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Old 05-24-2009, 09:41 AM   #1
Field and Son
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Crew Cab and Suburban Frames

Does anyone know if a 1976 era crew cab frame is the same as a suburban frame??
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Old 05-24-2009, 11:35 AM   #2
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Re: Crew Cab and Suburban Frames

not the same.
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Old 05-24-2009, 05:05 PM   #3
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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
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Old 05-25-2009, 07:21 AM   #4
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Re: Crew Cab and Suburban Frames

only the same to the back cab mounts
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Old 05-25-2009, 09:01 AM   #5
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Re: Crew Cab and Suburban Frames

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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.
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Old 05-25-2009, 12:34 PM   #6
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Re: Crew Cab and Suburban Frames

so this wouldnt work for a crew cab short bed build just asking
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Old 05-25-2009, 01:39 PM   #7
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Re: Crew Cab and Suburban Frames

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so this wouldnt work for a crew cab short bed build just asking
nope.
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Old 05-25-2009, 10:00 PM   #8
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Re: Crew Cab and Suburban Frames

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nope.
didnt think so

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Old 05-26-2009, 12:51 PM   #9
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Re: Crew Cab and Suburban Frames

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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
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Old 07-15-2009, 04:51 PM   #10
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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.
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Old 10-05-2009, 12:49 PM   #11
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Re: Crew Cab and Suburban Frames

That can be done, but you'll have a bed about 3-4' or so long.
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Old 10-05-2009, 01:21 PM   #12
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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.
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Old 10-05-2009, 05:47 PM   #13
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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.
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Old 10-17-2009, 01:04 PM   #14
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Re: Crew Cab and Suburban Frames

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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.
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Old 10-18-2009, 10:18 PM   #15
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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.
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Old 10-19-2009, 12:21 AM   #16
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Re: Crew Cab and Suburban Frames

yes the middle mounts line up
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Old 10-19-2009, 02:23 AM   #17
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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?
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"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."
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Old 10-20-2009, 12:02 AM   #18
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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?
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Old 10-20-2009, 12:03 AM   #19
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Re: Crew Cab and Suburban Frames

Ghetto, are those middle perches the correct height also?
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Old 10-20-2009, 05:44 AM   #20
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Re: Crew Cab and Suburban Frames

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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.
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Old 10-24-2009, 04:24 AM   #21
sailed2japan
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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?
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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."
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Old 10-24-2009, 03:16 PM   #22
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Re: Crew Cab and Suburban Frames

frames are the same height
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Old 10-25-2009, 02:24 AM   #23
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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.
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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."
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Old 10-25-2009, 06:00 PM   #24
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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!
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Old 10-25-2009, 06:34 PM   #25
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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?
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"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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