Crew Cab and Suburban Frames - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Field and Son · 05-24-2009, 09:41 AM

Does anyone know if a 1976 era crew cab frame is the same as a suburban frame??

smashingchuck · 05-24-2009, 11:35 AM

not the same.

pig rig · 05-24-2009, 05:05 PM

the crew cabs wheel base is about 14' and the subs are about the same as a std cab

ghettoluxury · 05-25-2009, 07:21 AM

only the same to the back cab mounts

Dooley · 05-25-2009, 09:01 AM

Quote:

Originally Posted by Field and Son

Does anyone know if a 1976 era crew cab frame is the same as a suburban frame??

The Suburban has a 129.5" and the crewcab has a 164.5 wheelbase.

Robertw · 05-25-2009, 12:34 PM

so this wouldnt work for a crew cab short bed build just asking

smashingchuck · 05-25-2009, 01:39 PM

Quote:

Originally Posted by Robertw

so this wouldnt work for a crew cab short bed build just asking

nope.

Robertw · 05-25-2009, 10:00 PM

Quote:

Originally Posted by smashingchuck

nope.

didnt think so

ghettoluxury · 05-26-2009, 12:51 PM

Quote:

Originally Posted by Robertw

so this wouldnt work for a crew cab short bed build just asking

only if you use the front part of the burb frame and mate it to the back half of a shortbed frame, did this fo a friend a couple months ago

Tow Me · 07-15-2009, 04:51 PM

My dad and I just got done welding together a Suburban frame and a short bed truck frame. We measured it out perfectly so that we cut the frame in a straight section of the frame and were able to mount the rear cab mounts in the right place. All the holes line up even for the gas tank. Its like the factory short bed crew cab frame Chevy never made. I don't think it matters but mine is a 1/2 ton now. The old frame crew cab long bed frame was 3/4 ton.

I have never heard of anyone doing this, but my dad came up with the idea after seeing a guy that built crew cab rock crawler with a flat bed... all on a Suburban frame.

sailed2japan · 10-05-2009, 12:49 PM

That can be done, but you'll have a bed about 3-4' or so long.

Tow Me · 10-05-2009, 01:21 PM

Our frame does not require a 3-4' long bed. Its a standard short bed now. We measured for that exact reason. Its what a CCSB frame would be from the factory.

sailed2japan · 10-17-2009, 01:04 PM

Quote:

Originally Posted by Tow Me

Our frame does not require a 3-4' long bed. Its a standard short bed now. We measured for that exact reason. Its what a CCSB frame would be from the factory.

Yeah I was talking about putting a crew cab on a burb frame w/o mods. sorry I guess that was placed oddly.

Storm Chaser · 10-05-2009, 05:47 PM

There are a few crew cab short beds done by members of this site. Rick (TooManyToys) did one with a stepside bed.

Storm Chaser · 10-18-2009, 10:18 PM

Oh, I see. Well, as far as the cab goes, the front-most body mounts on the cab will go right to the same on the frame. This will locate your cab where it needs to be on the frame (naturally, the core support will be correct also. I know this much to be right, as I cut up a burb right next to my crew cab and measured it out for an idea I abandoned

What I don't know (cuz I didn't measure) is if the middle mounts on the cab line up on the frame right, and I'm pretty sure that the rear-most cab mounts will NOT line up with anything on the burb frame. It wouldn't be difficult to fab up some cab mount perches, and the front ones will locate the cab for you, so at least you have that.

Burb rear doors are the same as crew cabs, so you shouldn't have much trouble with the back tires getting into the cab, unless your tires are monstrous.

ghettoluxury · 10-19-2009, 12:21 AM

yes the middle mounts line up

sailed2japan · 10-19-2009, 02:23 AM

But the rears don't?

So just a set of custom rear mounts away from having a funky crew cab rock crawlin' off road riggamaroo?

Storm Chaser · 10-20-2009, 12:02 AM

Yea, the rear most cab mounts on the crew cab are just like the rear mounts on a standard cab- they are more inboard than the others, sitting on a crossmember. On a Suburban, the 'cab' doesn't end there (so to speak), and if I remember correctly, what would be the last set of mounts on a crew cab are still on the outboard side of the Burb frame (I may be wrong, so if anyone knows, let us know). If I'm not mistaken though, you should be able to take that crossmember from a truck frame and easily install it to the Burb frame for your rear mounts.

What are your plans for the bed?

ghettoluxury · 10-20-2009, 05:44 AM

Quote:

Originally Posted by Storm Chaser

Yea, the rear most cab mounts on the crew cab are just like the rear mounts on a standard cab- they are more inboard than the others, sitting on a crossmember. On a Suburban, the 'cab' doesn't end there (so to speak), and if I remember correctly, what would be the last set of mounts on a crew cab are still on the outboard side of the Burb frame (I may be wrong, so if anyone knows, let us know). If I'm not mistaken though, you should be able to take that crossmember from a truck frame and easily install it to the Burb frame for your rear mounts.

What are your plans for the bed?

Correct and yes the middle mounts are the correct height the ccsb we built we ised a 1/2 ton burb till about 6 inches behind the middle mount and a 1/2 ton shortbed from there out.

sailed2japan · 10-24-2009, 04:24 AM

does anyone know the difference between a 1/2 and 3/4 ton 'burb frame, if there is one?

Storm Chaser · 10-20-2009, 12:03 AM

Ghetto, are those middle perches the correct height also?

ghettoluxury · 10-24-2009, 03:16 PM

frames are the same height

sailed2japan · 10-25-2009, 02:24 AM

So the only difference between a 3/4 ton burb and a 1/2 ton is running gear? i guess they didn't plan on burbs carrying too much weight.

**1774btcrew** · 10-25-2009, 06:00 PM

Is there a reason you are so set on the Suburban frame for under a crew cab? If you already have a crew cab with a frame under it the easiest way is to just shorten the frame. I did mine and it came out excellent! it was within 1/16" of an inch from being exact from side to side. I put all half ton suspension under it. Mine has a 4bt with a 4L80 transmission and a Compushift controller with 3.73 rear gears. I love the truck!

sailed2japan · 10-25-2009, 06:34 PM

I'm not set on anythin I was just cntemplating different things and wondered if the 3/4 ton burbs had a heavier frame like 3/4 and 1 ton truck do. How much did you take out of the frame to make yours? I'd actually much rather like to have a 3/4 ton frame as I plan on running a 6bt of some sort. Do you have a build tread on your truck?

05-24-2009, 09:41 AM	#1
Field and Son Registered User Join Date: Nov 2008 Location: Fond du Lac, Wisconsin Posts: 425	Crew Cab and Suburban Frames Does anyone know if a 1976 era crew cab frame is the same as a suburban frame??

05-24-2009, 11:35 AM	#2
smashingchuck It'd be alot cooler if you did Join Date: May 2003 Location: Three Rivers, MI Posts: 2,345	Re: Crew Cab and Suburban Frames not the same. __________________ 78 Build Thread 4Runner Build

05-24-2009, 05:05 PM	#3
pig rig Registered User Join Date: Feb 2009 Location: washington the state Posts: 730	Re: Crew Cab and Suburban Frames the crew cabs wheel base is about 14' and the subs are about the same as a std cab __________________ my sports car rolls on six wheels only because I'm to fat to get in and out of new corvette http://hubgarage.s3.amazonaws.com/ph...ped_detail.JPG

05-25-2009, 07:21 AM	#4
ghettoluxury Registered User Join Date: Apr 2009 Location: Waynesfield Ohio Posts: 1,991	Re: Crew Cab and Suburban Frames only the same to the back cab mounts __________________ 1949 Five Window, 1973 Step Side, 2000 Z71

05-25-2009, 12:34 PM	#6
Robertw Registered User Join Date: Jun 2008 Location: muldrow ok Posts: 87	Re: Crew Cab and Suburban Frames so this wouldnt work for a crew cab short bed build just asking

07-15-2009, 04:51 PM	#10
Tow Me Glen Join Date: Sep 2008 Location: Roseburg, Oregon Posts: 331	Re: Crew Cab and Suburban Frames My dad and I just got done welding together a Suburban frame and a short bed truck frame. We measured it out perfectly so that we cut the frame in a straight section of the frame and were able to mount the rear cab mounts in the right place. All the holes line up even for the gas tank. Its like the factory short bed crew cab frame Chevy never made. I don't think it matters but mine is a 1/2 ton now. The old frame crew cab long bed frame was 3/4 ton. I have never heard of anyone doing this, but my dad came up with the idea after seeing a guy that built crew cab rock crawler with a flat bed... all on a Suburban frame.

10-05-2009, 12:49 PM	#11
sailed2japan Jonny Join Date: Apr 2008 Location: Outside the Box, Austin,TX Posts: 741	Re: Crew Cab and Suburban Frames That can be done, but you'll have a bed about 3-4' or so long. __________________ 1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR

10-05-2009, 01:21 PM	#12
Tow Me Glen Join Date: Sep 2008 Location: Roseburg, Oregon Posts: 331	Re: Crew Cab and Suburban Frames Our frame does not require a 3-4' long bed. Its a standard short bed now. We measured for that exact reason. Its what a CCSB frame would be from the factory. __________________ Glen Simpson Severed Ties - Oregon Roseburg, Oregon 1983 Chevrolet C10 - Ginger Photos 1970 Chevrolet C10 Suburban Build Page: 1970 Pale Shade of Brown Past Trucks 1981 GMC Crew Cab Short Bed Project Crewella: 1981 CCSB 1999 Chevrolet K2500 CCSB Photos

10-05-2009, 05:47 PM	#14
Storm Chaser Registered User Join Date: Oct 2006 Location: In the Indiana Corn Posts: 449	Re: Crew Cab and Suburban Frames There are a few crew cab short beds done by members of this site. Rick (TooManyToys) did one with a stepside bed. __________________ 1988 R2500 Crew Cab Immediate plans- get it running! Future plans- Rear disc swap & Hydroboost Dually conversion with shackle flip-n-switch 4x4 conversion with 52" springs Maybe some new body panels Who needs a car when they make crew cab trucks?

10-18-2009, 10:18 PM	#15
Storm Chaser Registered User Join Date: Oct 2006 Location: In the Indiana Corn Posts: 449	Re: Crew Cab and Suburban Frames Oh, I see. Well, as far as the cab goes, the front-most body mounts on the cab will go right to the same on the frame. This will locate your cab where it needs to be on the frame (naturally, the core support will be correct also. I know this much to be right, as I cut up a burb right next to my crew cab and measured it out for an idea I abandoned What I don't know (cuz I didn't measure) is if the middle mounts on the cab line up on the frame right, and I'm pretty sure that the rear-most cab mounts will NOT line up with anything on the burb frame. It wouldn't be difficult to fab up some cab mount perches, and the front ones will locate the cab for you, so at least you have that. Burb rear doors are the same as crew cabs, so you shouldn't have much trouble with the back tires getting into the cab, unless your tires are monstrous. __________________ 1988 R2500 Crew Cab Immediate plans- get it running! Future plans- Rear disc swap & Hydroboost Dually conversion with shackle flip-n-switch 4x4 conversion with 52" springs Maybe some new body panels Who needs a car when they make crew cab trucks?

10-19-2009, 12:21 AM	#16
ghettoluxury Registered User Join Date: Apr 2009 Location: Waynesfield Ohio Posts: 1,991	Re: Crew Cab and Suburban Frames yes the middle mounts line up __________________ 1949 Five Window, 1973 Step Side, 2000 Z71

10-19-2009, 02:23 AM	#17
sailed2japan Jonny Join Date: Apr 2008 Location: Outside the Box, Austin,TX Posts: 741	Re: Crew Cab and Suburban Frames But the rears don't? So just a set of custom rear mounts away from having a funky crew cab rock crawlin' off road riggamaroo? __________________ 1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR

10-20-2009, 12:02 AM	#18
Storm Chaser Registered User Join Date: Oct 2006 Location: In the Indiana Corn Posts: 449	Re: Crew Cab and Suburban Frames Yea, the rear most cab mounts on the crew cab are just like the rear mounts on a standard cab- they are more inboard than the others, sitting on a crossmember. On a Suburban, the 'cab' doesn't end there (so to speak), and if I remember correctly, what would be the last set of mounts on a crew cab are still on the outboard side of the Burb frame (I may be wrong, so if anyone knows, let us know). If I'm not mistaken though, you should be able to take that crossmember from a truck frame and easily install it to the Burb frame for your rear mounts. What are your plans for the bed? __________________ 1988 R2500 Crew Cab Immediate plans- get it running! Future plans- Rear disc swap & Hydroboost Dually conversion with shackle flip-n-switch 4x4 conversion with 52" springs Maybe some new body panels Who needs a car when they make crew cab trucks?

10-24-2009, 04:24 AM	#20
sailed2japan Jonny Join Date: Apr 2008 Location: Outside the Box, Austin,TX Posts: 741	Re: Crew Cab and Suburban Frames does anyone know the difference between a 1/2 and 3/4 ton 'burb frame, if there is one? __________________ 1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR

10-20-2009, 12:03 AM	#21
Storm Chaser Registered User Join Date: Oct 2006 Location: In the Indiana Corn Posts: 449	Re: Crew Cab and Suburban Frames Ghetto, are those middle perches the correct height also? __________________ 1988 R2500 Crew Cab Immediate plans- get it running! Future plans- Rear disc swap & Hydroboost Dually conversion with shackle flip-n-switch 4x4 conversion with 52" springs Maybe some new body panels Who needs a car when they make crew cab trucks?



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10-24-2009, 03:16 PM	#22
ghettoluxury Registered User Join Date: Apr 2009 Location: Waynesfield Ohio Posts: 1,991	Re: Crew Cab and Suburban Frames frames are the same height __________________ 1949 Five Window, 1973 Step Side, 2000 Z71

10-25-2009, 02:24 AM	#23
sailed2japan Jonny Join Date: Apr 2008 Location: Outside the Box, Austin,TX Posts: 741	Re: Crew Cab and Suburban Frames So the only difference between a 3/4 ton burb and a 1/2 ton is running gear? i guess they didn't plan on burbs carrying too much weight. __________________ 1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR

10-25-2009, 06:00 PM	#24
1774btcrew Senior Member Join Date: Jun 2009 Location: Phoenix AZ Posts: 4,603	Re: Crew Cab and Suburban Frames Is there a reason you are so set on the Suburban frame for under a crew cab? If you already have a crew cab with a frame under it the easiest way is to just shorten the frame. I did mine and it came out excellent! it was within 1/16" of an inch from being exact from side to side. I put all half ton suspension under it. Mine has a 4bt with a 4L80 transmission and a Compushift controller with 3.73 rear gears. I love the truck! Attached Images

10-25-2009, 06:34 PM	#25
sailed2japan Jonny Join Date: Apr 2008 Location: Outside the Box, Austin,TX Posts: 741	Re: Crew Cab and Suburban Frames I'm not set on anythin I was just cntemplating different things and wondered if the 3/4 ton burbs had a heavier frame like 3/4 and 1 ton truck do. How much did you take out of the frame to make yours? I'd actually much rather like to have a 3/4 ton frame as I plan on running a 6bt of some sort. Do you have a build tread on your truck? __________________ 1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR Last edited by sailed2japan; 10-25-2009 at 06:35 PM.

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