Gmt400 frame differences 4 L V8 with the 8. 5" 14 bolt) Both have the same number of leaf springs, but the overload leaf in Feb 24, 2016 · Found this information, and just wanted to post it here as I've seen a few threads ask/mention about it. How it looks is a different story. 93-94(without pwm pump)--5 solenoids 94 -95 with pwm pump--6 solenoids w/blue connectors, for extra pwm solenoid Hey everyone, I'm looking forward to swap my C2500 to 4x4, D60s in mind. I know I need a driveshaft, brake lines, a bed but as far as the frame what do I Oct 10, 2021 · The springs may have an extra leaf or might be a little thicker, and a slight increase in frame thickness as well I think. [1] The GMT 410, GMT 420, GMT 425, and GMT 430 variants were derived for full-size SUVs, including the 1992–1994 Chevrolet Blazer and 1995–2000 Tahoe, and the GMC Yukon from late 1991 to 2000. And a gmt800 looks vastly different than a gmt900 and so on. Jul 6, 2019 · Bed differences 88-98 Chevy trucks. suburbans avalanches tahoes have coil spring in the rear with 5 link, and fully boxed frames sections. The differences between heavy duty chassis and light duty chassis parts has bewildered the parts store clerks before (8 trips to the damn parts store to change front brake calipers and wheel bearings) so I have decided this time to order all my brake parts online. Anyway on to my question, I'm looking for the frame specs for 88-98 GM/Chevy trucks, 1500-3500, std, extended, four door, short and long bed trucks. I BELIEVE all this is correct, but feel Jan 14, 2016 · The primary difference between the two is the length of the taper/stud. The only problem is that the steel they used for the 2500 is 3/16. Nov 26, 2023 · What are the differences between GMT400 and GMT800 frames? The GMT400 and GMT800 frames are designs used in Chevy trucks. 3 4x4. C&C's are ladder straight and 34" apart once they kick up behind the cab, all the way to the rear. I can use OEM capacity springs, or beef them up a little (at the expense of a stiffer ride when Dec 9, 2017 · Frame, brakes, axles? Engines and transmissions are the same across the board, so what's different? RCLB K2500, K3500 Differences? Thread starter SPDMETL; Start Jan 7, 2020 · Anyways, I was looking for answer as to what the difference is between the 15 and 2500 trucks, as far as I could tell dimensions wise everything is just about the same. I had a 2500 Burb that had the semi floating axle, basically a larger version of the old GM trucks 12 bolt. Pretty new to this world, but am learning. You should dig deeper into it. Feb 13, 2011 · The 9. i figure if i buy a whole truck i will have everything i need like the May 1, 2018 · 2. difffernt frames for HD trucks than light duty trucks. A 2wd like in the pic goes up and out at the rear end. I hear rumors that the frame is thicker, which I beleive is true. It got sold so i'm still on the hunt. IE: Springs, thicker/bigger frame, larger rear axle (I thought there was a 10. Jan 7, 2020 · Are there any differences between the ladder frames of a 6. Because of he shape of the frame, the V6's mounts in the V8 position, & the actual mount points end up at the wrong angles. Sep 14, 2018 · Are there huge difference between 67 C20 long bed frame with 67 C10 short bed besides the length? Would it be direct swap? I have come across a C10 short bed frame and I would love to swap my long bed since it barely fits in my garage! Nov 27, 2024 · Driver's side frame is hurt on the bumper horn, both sides pushed up a bit. 7 in it, recently a 1998 2500 with the 5. 67-68 used the thinner washer type setup with a small hole in the frame, AND the metal supports on the frame are mounted higher. 70 shortbed stepside Dec 1, 2023 · GMT400’s really were amazing when they came out. Tons of differences between the GMT400's and GMT800's. Jun 29, 2022 · These brackets on the inner frame each side don’t even know what that’s for . tortion bars forward same as 1500s. In summary, the GMT400 pickups set a new standard with their aerodynamic design, advanced suspension technology, user-friendly four-wheel drive system, and improved safety features Dec 4, 2010 · Hi folks, Been away for a while but found my way back. Notice the cupholders on the half-tons disappeared and were replaced with said airbag. as far as difference between a 1500HD and a 2500 in NBS, I have no clue. The 73-80 has a upper bracket and the end of the frame rail is rounded. Nov 30, 2023 · The vans used a different setup, filler tube presses into a large grommet. 27" long tapered portion, and the ES409R is . Nov 29, 2017 · Upper control arm-to-frame nut -- 140 Lower control arm-to-frame nuts -- 121 There are a lot of variations among the GMT400 platform by vehicle, year, 2 or 4 Oct 1, 2024 · 1. As long as you tow smart you should be ok just pray d. Site Info and Forum Rules. t. However going the other way around can be more difficult, if you actually want the 4x4 to work I tried to find some pictures of the frames to compare them. That is, the difference between leaf and coil 2wd frames which are also different than 4wd frames. Pick which one you want/need and get the entire correct frame for your purposes and go from there. If it was me i would look up what your truck can tow and don't go over it. By the way, old school GMT400 frames were a lot thicker than GMT800 frames. aut manual Have same frame DIFFERENT crossmembers Jan 31, 2025 · I have a 1988 Chevy Silverado c1500 with the 8ft bed. e. I found one off of a 2500, or 3500 4x4 truck not sure what year truck it’s from because it’s just the bed. Mar 2, 2014 · When you look under a HD, the frame has the same gap between it and the cab as any other truck, thus the "body raise" is the 2" taller frame. Got stationed overseas and left my Blazer back at my moms while I'm here. Meet Dan Pettigrew AKA OBS Kenobi your Master Fabricator. both 3500s are 4. I ended up using a 1500 lift kit on this truck from rough country but never found anything on suspension/towability differences, just dimension specs. Mar 14, 2016 · I agree, you got to be lucky to just run across a GMT800 frame/roller for dirt cheap. front is another story. 3500HD trucks only came in 2wd From what I've seen, the only difference in frames for 2500 and 3500 SINGLE rear wheel is the 3500 has more in the leaf pack or factory overload springs. Just a word of caution, IMHO the 800 frames are more rust prone then the 400 frames. or change out the upper control arm with one from an 8 lug truck. 250 inch thick. 4L V8. And of course the rear frames between those trucks are waaay different. Likely just forward of the last cab mount/first bed mount. Jan 21, 2018 · The frame designs are the same, some thickness and some height differences between the light and heavy duty frames. Mar 3, 2024 · My 1989 Silverado was hit hard in the back end a few weeks ago. Something Nov 3, 2011 · What did impress was the 1996 k1500 I test drove. I was curious if there were differences between a 94 k3500 non hd compared to a 96 k3500 non hd Dec 4, 2010 · Hi folks, Been away for a while but found my way back. Plus I have a 93 GMC diesel truck bumper that fits just perfect. Apr 28, 2023 · My 94 K1500 6. in addition to these differences the rear end is usually narrower as well, about 8" narrower overall, to Feb 20, 2009 · The core supports are really the same dimension wise, it the head light bucket thing that is different. But I need to know what's all needed. Dec 2, 2009 · I will illustrate the history of the 5. Jan 4, 2021 · The GVWR being higher pretty much necessitates higher spring rates, better brakes, better differentials, etc. GMT400 Contact us; In contrast to the Hummer H1–designed and assembled by AM General, the Hummer H2 and Hummer H3 were developed by GM, receiving their own platform designations. Sep 29, 2021 · The C20 frame has the same curves section/ bump outs (circled in the picture) as the C10. That_91K1500; 98 bucket Seat frame repair. 5" rear semi-floating axle and 10. McDermott; GMT400 Contact us; Apr 26, 2021 · GMT400 V6 frame side engine mounts are different from the SBC/BBC ones. If the compressor locked-up, you will need to solvent-flush EVERYTHING, and replace the orifice tube and dryer, there will be shrapnel everywhere in the system. They got the bigger axle (14 bolt semi float) but they didn't get the same frame as the real 2500 trucks. 5" Crew Cab / Short Bed Wheelbase (in):154. Once it's built up I'd like to swap my current bed/cab/clip over to it. I've been receiving a lot of requests lately to retrofit all different genres of the GMT400. Its to the point where its easier and safer to graft a new frame onto this one. Sep 26, 2021 · If I recall correctly, the only difference is that in the last two inches or so, the 4x2 frame has a rounded blunt end to it, while the 4x4 frame is like an open C-channel at the very end so that the recovery hooks can be mounted inside the frame and poke foward through the bumper. 2 block and thought i could use the frame to cut up and use to extend the 1500 to accept a crew cab. However a GMT400 could probably be found all over the place, maybe not 3/4 ton/1 ton 4x4 but still. The frames are all different, ecsb frames are different from a rclb. 48 in. Nov 7, 2012 May 26, 2016 · they are the same, and often even the 2wd and 4wd frames are the same. Jan 6, 2011 · The frames, wheel bearings, steering, etc shows up as the same part numbers There were some differences in braking packages available over the years, a 9. The frame is tapered too, not dead parallel, so that adds some complexity. Not sure. A gmt400 looks vastly different than a gmt800. Richard Nov 3, 2011 · What did impress was the 1996 k1500 I test drove. The biggest difference I have seen in Vortec and TBI valve covers on a truck is the attachment bolts and the size of the PCV baffle boxes inside. 4) body mounts are different you need to use the ones for the year of your frame. 1 L Vortec 8100 V8, making it the only GMT400 vehicle to use this engine. Crew Cab / Long Bed Wheelbase (in): 168. Leaf spring frames do not have rivet holes in them for the coil style shock mount cross member / spring perch. 5L 1500 suburban but to keep the cargo and weight ratings acceptable (and probably overall longevity of the drive terrain components as well) they were actually light 2500s hence the 8-lug axles. My question is, is there a difference between the 2wd 4dr frames? Dec 2, 2009 · The NBS hoses will clip directly onto your frame-mounted brackets, but you will need a brass fitting to adapt your 3/16 steel lines to the hoses that are designed for 1/4 steel lines. 73. 5" Extended Cab / Short bed Dec 13, 2020 · Pretty much like the title says - Are there any differences between the early and later year 2WD frames? For some reason I remember the steering box mounting angle changing at a certain year. The ES2218R uses a 1. So, I can get a 99 2500 obs 8 lug rear frame cheap and easy. . 3) Dash pads are different. The GMT400 was used from 1988 to 1998, while the GMT800 was used from 1999 to 2006. 5" Extended Cab / Long Bed Wheelbase (in):155. bed off and on frame machine 2. 69-72 went with a larger hole and taller bushing type mount and the frame Jan 1, 2012 · Apologies for reviving an old post, I lost sleep looking for frame info last night. I could not find a thread on here that outlined the actual differences in the automatic transmissions of our trucks. From what i understand the only difference in the frames are the coil mounts, UCA mounts and the front 6" of a 2wd frame curves upward. I have a 1997 K3500 4x4 I would like to purchase some lower control arms to rebuild for a swap. Its in really solid shape too. I'm thinking about building up a swb frame to my liking w/ some PB and other suspension parts as a side project. The Bore and Stroke of the LO5 was 4. I have got a 1992 K2500HD truck and could get K1500 frame from 1994. I bought a 2500 for the 6. 7 was only an option for duallies in the 3500 class. SBC & BBC frame mounts are the same. While they may be similar in overall lengths, the extra chunks in the frames are in different locations Nov 30, 2018 · The rear is as easy as swapping the axle out. Something Feb 23, 2014 · The front differential is the smaller 1500 diff and the frame is built for that. The frame is a 1500 frame with a few minor extra braces/gussets. Jan 1, 2023 · 3500 frame differences. Standard cab Extended cab Quad cab Suburban Tahoe (2/4 door models) Escalade Denali Plus between the years 88-00 there was changes. 5" I would imagine that the best place to cut the 6 inches out of the frame is directly under that cab in the flat section. Upper control arm mounting points are also different between 1500 and 2500. I know the NV4500 fits fine, and the SM465 should as well since that trans was offered in those trucks. Thread starter easy5580; Start date Feb 5, 2023; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate Apr 23, 2020 · GMT900/GMT800 Body Mounts in GMT400 Frame. It is the radiator support on the '63-'66 and on the '67-'72 it is farther back and does not support anything except for a brakeline. Body lines and dimensions are different between each body style, with the gmt400 beds being the narrowest of the bunch. The heavy 2500 is basically a 1-ton truck with a few hundred lb lower payload. I BELIEVE all this is correct, but feel Apr 6, 2022 · A regular cab long is the same as an extended cab long box with 12'' (I am guessing) added to the frame under the driver's seat area. My 97 had a curt 14081 class 4 that sat right below the bumper tucked up higher shown below This one on my 93 is maybe some sort of a drop receiver maybe ? Was this standard or a c1500 /c2500/3500 style ? Seems tough enough just not sure I like the dropped So my frame completely disintegrated at the steering box. Apr 16, 2022 · There's a potential difference in repair process. You'll have to take length out between the cab and the upkick over the rear axle. It’ doesn’t look like it’s a welded connected portion of the receiver My entire frame is perfect this is only the last 8-10” at the ass end of the truck pretty much where the receiver bolts down …I think I’m gonna remove it and ***** things !! Nov 27, 2009 · Some of the brackets and cross members are different for sure,but you could change some of that. 3 V6 you will have to remove the V6 frame perches circled in red in the following photo. Site Updates and THE RULES. In a nutshell, an "F44" rpo code truck is a half ton frame (9. The key here is to use radiator mount bushings that match the FRAME, not the SUPPORT. Feb 5, 2023 · In my observations, 8 lug and crew cab are the delineators for frame thickness not 2500, 3500, or dually. Gmt400= 88-98 (the HD trucks went to 2000 and you can also have a 99 classic 1500) Gmt800= 99-07 (again in 07 you could have a gmt800 classic or the new style) Gmt900= 07-13 K2xx= 14-?? Dec 23, 2010 · Hello, does anyone's got some information about how much tougher the late 90's Dodge 2500 fram is compared to the 1500? Or is there any bigger difference beside the fact that the 2500 is longer? Nee a truck with a really tough frame, tougher than a land cruiser or G-Klass but most 250/3500 Dedicated to the GMT400 1988-1999 Chevy GMC Truck Parts OBS Performance. The spindle won't attach to the lighter duty upper ball joint so you'd have to re-drill the control arm for a different ball joint. I have been searching this morning briefly to see what I could dig but up not much other then the differences inside. The main differences between these frames are the design, suspension components, and steering systems. 25” (ring gear diameter) front differential and the 1500s have a 8. Feel free to comment or ask questions if you need anything. V6 mounts are further back on the frame than the V8's. Many of the posts I've read discuss differences between tonage not years. New posts GMT400. May 23, 2016 · Some good info here (in the beginning, he talks about the difference between the 88-93 and 94-98 brackets and gap issues): xc_hide_links_from_guests_guests_error_hide_media With the rear bumper, they are the same, but the brackets are different, so you will need to re-use your old ones. bolts up. It is not difficult at all, it could be done with a hacksaw if thats all you got. 73 geared. Even if I got the frame repaired, the cab doesn't look repairable and I'd still be stuck with a 'rebuilt' title at best. I imagine theres holes in the frame to mount the torsion bar xmc, as for the diff i cant remember if thats mounted off its own xmc or the engine cradle. add pressure and see how much walks out. They do sell a helper air bag that goes inside the rear coil springs that can level your load out for you. Feb 5, 2021 · I have the 2500HD and the differences are far more than just the frame. GMT400 frames were used from 88-2000 (give or take ending years depending on 1/2, 3/4, or 1 ton platform) model years They went to GMT800 frames starting in 98 with the 1/2 tons and added the 3/4 and 1 tons in the following years. This is a totally new chassis utilizing all-new Roadster Shop parts, and some off-the-shelf GM stuff as well. I drove a 1999 gmc sierra recently that was amazing, but I have no experience with the gmt800, and little with the gmt400. 188 - 0. The 3500 HD is in a class all its own and is "radically" different from all the Sep 20, 2023 · Welcome - There's very little difference in the frames across the years. Was going to be for my wife, but we had to upgrade to a full size passenger Express van. The 2wd trucks follow the same pattern as the 4x4 trucks, except they are 2wd in the front frame. I understand there are some differences between the two in the front but I can't find a list of those beyond 1) upper control arms / bj's are different, mounting points for the front diff may be different and mounts for the upper Jan 1, 2023 · Some of the brackets/suspension are a little different for duallies but frame is the same (as are all 8 lugs). Sep 14, 2017 · 67-72 Frame Differences The 1967 - 1972 Chevrolet & GMC Pickups Message Board 67-72 Frame Differences - The 1947 - Present Chevrolet & GMC Truck Message Board Network Register or Log In To remove these advertisements. Jul 22, 2020 · I have a 1993 gmc k3500 and I'm looking to upgrade my torsion bars because they are already sagged out and sitting on the bump-stops and they are 3/4 the way cranked in. The differences are mostly electronic 93 is the first year for the 4L60E. Richard Mar 5, 2021 · Neither of which are official terms in GMT400-land, however, you could consider these a 1500 with the F44 heavy duty suspension (comes with 9. 5 and 11 inch 14 bolt), larger hub bearings, etc. Adrian Apr 25, 2019 · Couple internet searches appear to confirm that k1500 and k2500 frames w/ suburban's are all the same width. The frame could be wider, that is my guess for the difference. 5TD frame is rotting out and I have an opportunity to get a K3500 frame that's in decent shape. not the heavy halfhave a frame made out of 1/8"? Nov 10, 2021 · In fact, the only thing you need from your old GMT400 is the drivetrain, bed, and cab. ( This is true even a a leaf 2wd) On a 4x4 frame the frame rails in this area are as straight as a board. The truck got backed into and I’m looking for a new bed. Could be wrong on some of it. The other guy's insurance has totaled it (no surprise), as the frame is bent under the cab area, and the bed slammed into the back of the cab. 5 " wide and made out of 1/8 steel. Bottom line will any 73-87 frame work? Any major differences between the years? Cab mounts, dimensions etc. 5" full-floating axle was also available in different configurations. May 21, 2007 · What is the difference between a K-5 blazer frame and a C-10 short bed frame of the same year, 70? (i. Is this true, and are there any other differences to be aware of? Home / 88-98 Full Frame. Quick View Roadster Shop Slammed SPEC Chassis - 88-98 GM Jul 21, 2020 · I understand that the wheelbase difference are as follows: 4 Door Tahoe/Yukon: 117. 66" long. Heck I used a 96 Yukon body parts to convert my 98 Chevy to a GMC and everything worked just fine. 2WD and 4WD frames used a different clamshell mount, the 2WD clamshell mount is mounted on a flat surface all the way around while the 4WD clamshell Sep 7, 2021 · The truck’s frame was broadened to accommodate the fuel tank within the vehicle’s body, addressing past safety issues associated with exterior-mounted gas tanks. The C&C rear axle is also about 8" narrower than a regular dually rear. 3. Designated the GMT825, the H2 was derived from the GMT820 (Chevrolet Tahoe/GMC Yukon), with its own midsection frame design and a rear frame shared with the 2500-series GMT800 pickup trucks. The only difference in control arms on 2WD GMT400's are the 2500's (8 lug, not the lighter duty 6 lug), and 3500's - got forged uppers (tubular appearance. From that weld to the back of cab-box kickup is the difference in the 8 foot Nov 21, 2014 · The frames themselves are different between the 6 lug and 8 lug 2500s, the front differentials, steering knuckles, and upper control arms do not interchange. 5 inches or so center to center. Sep 20, 2016 · The 4x4 frame is has tall rails under the cab and the c-channel portion is roughly 0. Worse than yours by far. The Vortec filler will fit TBI valve covers as long as the valve cover uses a threaded cap. Threads 7 Messages 20. The arch in the leaf springs has decreased to the point where it has been advised I have them replaced. 2500s/3500s utilize a 9. With a second frame it would be easier for me to start my resto. The frames is about 3/32" taller between the top and bottom of the frame rails and is made from slightly thicker steel. But as far as the bodywork and drivetrain mounting up, sure, if they're both same wheelbase and C1500's then yeah, they're close enough to same to make it happen. Nov 17, 2016 · There's no difference in frame. So you could use a SWB frame with the #4 position body mounts on top of the frame as I did (see tahoe build thread) and you would just need to build rear frame extensions with a slight z. I don't think 8 lug 2500 stuff would work on a 1500, but a measuring tape will be your friend there. From memory which is a little vague, I think the idler arm mount area is a little different, and very early trucks may not have the same sway bar bracket mount. Jul 30, 2018 · Shortening the frame can get tricky; hope you're a really good welder or know one you can depend on. Same as my daily, but it needs some tlc. I have only been able to find limited dimensions for the newer tie rod ends, so this is as far as I got with it. Under your truck, just below the brake pedal area, there's a factory weld that joins the c-channel frame to the boxed front section. 5. Jun 17, 2013 · The frames are the same, you could order the 2500 with the same springs/etc. Cab longbed, I want to cut the frame from longbed to shortbed. We live & breathe OBS and guarantee to provide only the highest quality performance parts for our customers. Jan 21, 2018 · ive got 2-1997 srw 3500s 350/4l80 9200gvw and a 1996 2500 454/4l80 8600gvw. May 27, 2015 · Depends on what you are talking about. Thickness of the frame gets thicker with the cab configuration. The LO5 was introduced in 1987 for use in GMT400 and still continued older body style K5 Blazers and Suburbans. This would address 80-90%, the crown, the rails being down, and some of the wrinkle at the front of the hitch. 7 showed up in my price range. Aug 21, 2022 · The frames are very different up front C vs. If you are in need of technical advice on one of our parts, we are here to help! Aug 10, 2017 · This could include raising the height of the "C" channel, making it wider, or having a frame with thicker horizontial sections than vertical sections. Once removed, you are able to install the V8 clamshell mount in its place. The 4L80 transmission, front and rear axles, springs, frame, front suspension, 8 lug wheels etc. Mar 2, 2020 · 1) The very front section of the frames where the bumper mounts are different. "The widths on the trucks are the same with the exception of the cab-and-chassis. The 3500 SRW was just a 2500 8 lug with a big block. I have enough resources to be cheaper than buying a new truck. they seems identical other than one 3500 has a set of triangle spring packs that are ridiculously beefy. Probably 2 towers. Mar 16, 2021 · Basically all the beds from 1989 with the gmt400 to 2019LD with the k2xx body styles will bolt up to the frame. thats the only difference i can find. 5" 2 Door Blazer/Tahoe: 111. So I would think if you can interchange parts that May 29, 2023 · I stand corrected as the 3500 is thicker and 1-1/2" to 2" taller (top of frame to bottom of frame) under the cab area of the 3500. My question is does a normal 1500 4x4. May 15, 2010 · Don't get me wrong, this 2500 is more truck than I'll probably ever need (DD and plowing 400 feet of personal driveway in the winter), I was just wondering what the differences may be, if any. The cabs are all the same, yes. Richard. Generally ladder straight frame rails instead of tapered, 34" apart, and an extra 4" added to the wheelbase - this facilitates upfitting of a large number of beds such as flatbeds, utility boxes, wrecker beds, etc. Hell, they still looked really good and modern when they were gone after 1999! Most reliable years are pre 1996, because those TBI motors really didn’t have much to go wrong with them… however the Vortec motors after 96 added like 50hp and drive better… but with more issues (i. 5 inch sf 14 bolt 3. Apr 6, 2022 · The issue on GMT 800/900 SUVs 1500 vs 2500 is coil rears vs leaf and transmission differences. o. Reactions: HotWheelsBurban and easy5580 Feb 5, 2023 Nov 6, 2022 · 2500 8 lug can be full floating axles or semi floating. 2) The position of the radiator support mounts 3) The very front crossmember. The SS was built based on a 1500 truck, with some heavier stuff borrowed from the heavier trucks. Any help is appreciated. Mar 6, 2015 · The differences between the '63-'66 and '67-'72 frames are 1) The front frame horns for the bumper. Heck, the GAWR (gross axle weight ratio) between a K2500 and a K3500 for the rear is 6,000 lbs (K2500) and 6,084(K3500). Cab and chassis is much beefier and the HD beefier yet. ) Aug 21, 2022 · There are some minor differences, gonna say the idler arm bracket mount is different, and possibly the sway bar mount. Any differences between these two trucks besides frame thickness and lugs on the wheels? May 6, 2025 · GMT400 - The Ultimate 88-98 GM Truck Forum. Apr 17, 2007 · Self explanatory when you inspect the two side by side. The GMT 400 and similar GMT 480 was the platform used for the Chevrolet C/K and GMC Sierra full-size pickup trucks beginning with the 1988 model year. The only difference between stepside and shortbed fleetside is the bed itself (duh), rear bumper (deeper edge cutouts for stepside Jun 26, 2023 · The 1500 frame is different from the 2500 and 3500 frame Very large differences in frames for 2wd vs 4wd. 3500 should be full floating axle. I will get back to you later today. Roadster Shop Slammed SPEC Chassis - 88-98 GM Truck. If anyone else has seen otherwise, please post up. K, as well as differences overall 1500 vs. Maybe because its a crew cab? Other than having a bigger differential and heavier duty springs everything appears to mount and be in the exact location as the 1500 aside from the differences above. Sep 27, 2010 · Anybody know the differences between the GMT400 rear axles and the GMT800 rear axles? Sep 28, 2010 #7 OldCracker29 I've been knocked down drug out and left for dead. 1) would a 4 door 2wd Yukon/Tahoe frame work (if i narrowed the frame in the middle?) 2) Would any 2wd truck frame work? RCSB possibly? or are the completely different? A couple side questions: ON 2 door Tahoe's, is a 4x4 considered a 2500 chassis, and subsequently taller than a 1500? Thanks for helping out the new guy. No big deal. 5L diesel engine V8, and 7. While the GMT 400 faced challenges like early ball-joint failures and a softer ride, its overall performance, fuel efficiency, and towing capacities marked a significant improvement over the "square body" generation. Q. We have 2 frame shops in town, both said the same thing; We'd love nothing more than to do such a simple, real frame pull BUT we are contracted to the insurance companies and can't say when we'll have time to do it. Click to expand Talk to "Someotherguy" on Fullsizechevy, he will tell you everything about the frame differences in 1500-3500 trucks, the 3500HD is a totally different frame I believe he said. Here's my example-Years alike: 96-98 Mar 21, 2024 · I am the proud, second owner of this 4x4 1/2 ton. They claim there are two types both forged and stamped steel. This bein said, im sure it could be done, just not sure how much work would be involved in making it fit. There's no direct-swap rotor, so you'd have to change the spindle. Set up to pull at a slight incline. Recently I've heard there are some differences between both platforms, some people say the K2500 chassis is thicker, or that it is reinforced/bulkier in the front and middle section. I was wondering if there are any differences in the frames between years. If the system held pressure, you wouldn't even need a re i would really like to have a 5-speed in my truck I've always wanted a ext cab 5-speed in my truck i was just wondering if i bought a rusted out truck between 96-98 with the 4. transversely the 2500s over to HD chassis. Jan 21, 2014 · I have been compiling this info for a while, finally got around to posting it. What engines are used in the GMT400 and GMT800? The GMT400 used various ranges of engines, such as 4. 3L V6, 5. They are not the normal 10. Its factory applications included: 1992/1993 Buick Roadmaster The GMT 400 and similar GMT 480 was the platform used for the Chevrolet C/K and GMC Sierra full-size pickup trucks beginning with the 1988 model year. So the row of body mounts on the square body will be too far inboard to line up with the frame. I was just going to upgrade it to the 10. Jan 16, 2019 · I am hoping somebody knows whats going on with lower control arm Identification. 4. I'd assume that the frame is "taller" than a C-10 frame, but every C-20 I've seen has had a frame that looks identical to my C-10. 5 K2500HD and a 6. Oct 4, 2021 · Are you going to shorten the frame to modify for a 6. Threads 7 Dec 1, 2012 · Don't think there would be a frame difference, maybe steering, but not frames. 3 5speed would the computer work on my 305. Oct 20, 2011 · The frames cant be that much different since parts are interchangable on them. The lowers, however, are the same and can be had made of stamped steel or forged steel. That would not matter if you need an entire frame for swap, but may want to know if you are cutting/replacing parts of the frame. 2500. e) length, wheelbase, strength, etc. A GMT400 Suburban can have, in some sections, thicker material than a GMT800 2500HD truck. . Oct 22, 2012 · Another noticeable visual difference was the addition (in 96) of passenger side front airbag. Not much difference between the 2500/3500 with the 7. The issue I've been facing is all the different interior/exterior variances. The 2500/3500 frame is taller than that under a 1500 and the front differential will not swap between the two. well the bolt holes on the seat frame are farther apart from front to back. The real difference as stated before is the frame rails themselves. Moving the V6 mounts to the V8 position doesn't work. Burb frames extend past the rear body for bumper mounts unlike the bolt-on center mounts on the trucks (burb outer bumper brackets still bolt on). frame machine tower to hitch via web straps etc. If the bearing locked-up, you need (at minimum) a new bearing. Sep 21, 2014 · Distance from frame rail to frame rail (Right-to-Left) is different by several inches. Almost nothing is compatible between the two platforms as far as bolt ons. its a 9. Aug 2, 2012 · The frame is 8" tall by 2. Nov 11, 2021 · Hello, hope all is well, i have a 96 k3500 454. Mar 13, 2017 · From my understanding, my sold the 6. Jan 3, 2024 · In 2001, the C3500HD chassis cab replaced the 7. I have a 1977 2wd SWB C10. The '89 may not even have a sway bar. I don't want to go stock as I run 9'-3 western plow with wings, it weights around 1-1,100lbs. Jun 3, 2014 · I could see doing this to a short bed to make a really short bed and keep the wheelbase, but i think the difference between the ext cab short bed and single cab long bed are very small. 10 gears, the 2500 is 3. Finding a K2500 Suburban in the yards is virtually impossible in my area. 5" 14 bolt), and the 2500 with the 7200 lb GVWR (6 lug, comes with 9. I'm looking for a later gmt400 our an early gmt800, so what's your alls experience past a test drive. Would anyone know what the dimension differences would be between these two? Did they carry over the same frame from the GMT400 to the GMT800 body style? Jul 24, 2024 · Does anyone know the cab and bed frame hight difference, and possibly where I could buy mounts since the GMT400 frame is wider than the Squarebody frame? I plan to use the 1997’s 350 and 5-speed transmission, but just do a simple body swap and harness adjustment, and any other advice would be greatly appreciated. It's been a while since I last measured, but the GMT400 frame rails (and their corresponding body mounts) are each about 3" further from centerline (6" overall), IIRC. On the other hand, the GMT800 vehicles were produced from 1999-2006. also, id part with one of Sep 1, 2016 · All 2WD GMT400's (except 3500HD of course, straight axle) have the same stamped lowers - 1500, 2500, 3500. Extended cabs have 6 cab mounts while regular cabs have 4. 7L V8, 6. Jun 30, 2014 · so ive got a 1988 k3500, and the rear end decided to eat the g80 spider gears. The 81-87 has a bracket that bolts between the bumper and the frame and the frame will need a piece trimmed off of it to clear the bracket. coolant Aug 23, 2011 · And it also looks like the tail shaft may be a little different where it would bolt to the 4wd transfer case. But this thread started out as Re: Difference between 4x4 and 2wd frames-Look here Mine is a 2wd frame and I was attempting to show the difference between two different kinds of 2wd frames. The boxing starts at the front and runs to a point just passed the front cab mount. 2500HD and 3500 use same frame but 3500 uses a heavier spring pack and heavier rated t-bars. Jan 21, 2018 · Also, the regular cab frame is a bit thinner than a crew cab frame. See where the frame is puckered in front/above the front bolt? This is exactly the frame damage that happens when you bump a trailer against a loading dock, hitch gets bumped at the drive-thru, someone bumps your trailer, etc. 5 ff 14 bolt, but im getting conflicting info online that the axles im looking at fit 90-98 gmt400's, so my question is whats the difference between the 88-89 and the 90-98 axles? Hey ya'll In the market for a 96-98 1500 4x4 with the 5. Mar 4, 2013 · The rear of the frame is in terrible shape. When you set the seat into the truck and align the two rear holes, the front holes in the seat frame are about 3 inches too far forward. Feb 21, 2016 · Hey guys. 0L V8, 5. The GMT400 vehicles were the 3rd generation GM pickup truck model, whereas the GMT800 vehicles were the 4th. 25 front diff) with heavier bars and heavier rear springs. Dec 1, 2019 · IF you are asking if the bracket will transfer from a GMT400 frame to a GMT800 frame, the bracket will not transfer. 5 front diff won't go into a 1500 frame without a set of drop brackets or hacking off a diff mount. Richard Oct 21, 2019 · Not sure if your post is a question because of my post. ( each take a different ball joint) One has a better Jan 24, 2019 · I also dont think the frames were as heavy. That means unless there is something interfering behind bumper or something in the way in terms of mounting that the frame widths match the 1500. What i found was interesting as it confirms that both C/K2500 and C/K3500 have the exact same frame. 5' bed of the SS? What about the 5 lug wheels? There's really a lot differences between the 1500 vs 2500/3500. don't pull Jan 24, 2024 · That taper at the rear is also one of the big differences between a C&C and a regular pickup. Jul 9, 2016 · A 4x4 frame can definitly be used in a 2wd truck. I also think it is probably easier to ls swap into a GMT400 frame than 73-87. 5 K1500? Both are SCLB frames. And pretty sure the SRW and DRW frames are the same. COM. Nov 17, 2015 · 1500 (6200? Gvw) and Light duty 2500 (7200? Gvw) were the same 6 lug but the gvw were different. I pried-off the bigger bracket and discarded it. The NBS brake hoses have 2 metal brackets crimped onto them for mounting the hoses along the way to the frame. Aug 2, 2008 · There is even a thickness difference between a 2WD 3500HD, and a 2WD 3600 (code name for Chassis Cab). Frame do not interchange between 2wd and 4x4 because of the front frame differences. You cannot readily bolt in a 9 If your GMT400 originally had a 4. Jul 3, 2013 · I have a bare 800 extended cab frame in my shop right now, I will go take a few rough measurements against my 400 extended cab frame. Edit - sorry the bellhousing is the same. Finding a proper shot of a c1500 frame turned out to be difficult, so bear with me K1500 frame Jun 15, 2012 · Difference in Frames. ive looked from stem to stern and cant find any difference in the frames, axles, or front control arms. That's what sagged it out it use Apr 4, 2022 · The passenger seat…. Jun 29, 2022 · Quick question/curious . A 99 Escalade is a GMT400, but a 2002 Silverado is not (though there are some token C3500 GMT400s from 2002 out there). I liked mine so much, that I actually bought another 2500 suburban, an 04 4x4 model. In the early model trucks (90 and earlier I think), these differences weren't there except for duallies. what is the difference between a 2500HD single wheel drive frame and a 3500 dually frame. 2) I had to drill new holes in the 84 frame to mount the 75 box for the second set of bed bolts from the cab (Never seen this mentioned anywhere!). Regards Jan Oct 3, 2023 · C&C have more of a universal design on the frame past the rear of the cab. The heavy duty 2500 was an 8 lug 8600 gvw that was completely different (frames, brakes, springs and stuff). So where GM placed the cab mount perches on the frames are in the same spots. 000 in x 3. From what I gather the 2500 is just like the old F44 gmt400 trucks which was the heavy half. v6 v8 no difference. Will the forward frame section (ahead of the control arm mounts) from any other trucks work? I'm guessing that the front section from a pickup is probably the Aug 2, 2012 · I have heard people say the 1/2 and 3/4 ton are the same frame but the 3/4 ton has extra bracing to the cross pieces and the 1ton is its own frame. They appear insignificant at first glance but surely some engineers at GM did the math on what they add to the overall package, or these differences wouldn't exist. I’m curious if there is any differences or if I can just bolt it up and be good. Extended cab frame is in between. 25” front differential. So after 2+ years, it sits. Sep 11, 2017 · I'm looking to start a project on my 89 4x4 ext. Jul 25, 2015 · The different body styles are very distinguishable. Thread starter coomer; Start date Apr 24, I have been compiling this info for a while, finally got around to posting it. Don't confuse a 2000 C/K2500 with a 1999 Silverado. Do you have any information about? Has anyone here done this conversion? Than you in advance. Sep 26, 2024 · Said many a times and had to work through argument after argument that the frames on these trucks(1500's) are for shyt. Attached is the frame specs from 1991 catalog from gm heritage center. If you are bound and determined to go forward with this I HIGHLY recommend that you find a complete truck and swap the body onto the undercarriage. I was curious if there were differences between a 94 k3500 non hd compared to a 96 k3500 non hd Feb 13, 2011 · The 9. There's a weld below the front door on all the trucks ,it where the C-channel changes to square tube part of frame. 7L here as it is the most common among GMT400 enthusiasts and owners. This 4L60E came out of a 2000 Silverado 5. ynhxpiqvgdskvfyeqaakzmtlyvghoilbpkgidcfvupkupojdca