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#1 |
Senior Member
![]() Join Date: Feb 2001
Location: Killen, Alabama USA
Posts: 3,574
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GMC rear bumper bracket help!!!
I'm in the process of converting my 72 Sierra Grande from a lwb to swb. I used a doner frame instead of cutting. The doner frame is a 69 or 70 GMC shorty. I'm installing a factory style chrome rear bumper but the holes do not line up?!? I've got a 69 Chevy frame here for comparison and the distance between the mounting holes is different and the actual location of the holes is different (I measured from the rear of the frame up to the first mounting holes and they are different). Did GMC's - or Chevy with leafs - use a different bumper bracket on short wheel bases? Thanks for any help.
Joshua
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72 Cheyenne Super swb. Factory 402/400,tach,posi,AM/FM, A/C. Adding cruise, 8-track 72 Cheyenne Super swb. 350/350 A/C, bucket seats 72 Cheyenne swb. Factory 402/400, tilt, posi, A/C 72 Cheyenne Super K-10. 350/4 spd., posi. 72 Suburban 350/350 tilt, tach, AM/FM, A/C, luggage rack 72 GMC Sierra lwb. 350/350, A/C. medium green/olive interior |
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#2 |
Registered User
Join Date: Jun 2008
Location: Ontario Canada
Posts: 139
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Re: GMC rear bumper bracket help!!!
the short and long wheel base frames with leaf spring suspension use different inner rear bumper brackets due to the shackle bracket location on the frame, it gets in the way on a swb where as the lwb frame extends far enough that it's not an issue. You'll need the proper brackets for a swb leaf spring truck. I found out after a lot of research that pretty much all the brackets are interchangeable between the years and GMC/chevy except for a swb leaf spring truck, it pretty much has it's own.
Here's what they'll look like, notice the inner brakets look similar but just a bit different. I forget the part number but several places carry them for around $60 Last edited by dakman; 02-22-2010 at 07:51 PM. |
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#3 |
Registered User
Join Date: Sep 2005
Location: Canton North carolina
Posts: 3,079
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Re: GMC rear bumper bracket help!!!
The innner brackets are the same brackets used for swb 4x4 and swb leaf spring gmc. They are roughly 65-75 dollars. Wes has a set as do some others, but regular inners will not work, they must have the inner structural support added as pictured previously.
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67 blue step side- bb 68 gold and white swb cst anniversary 68 custom swb hot rod Ls swap 69 swb cst 6 cylinder/ overdrive 69 black/black cst bb swb 70 orange and white cst Canada built truck swb bb 71 black and white super swb bb 71 red and white super swb 72 green and white super swb 4x4 62 nova wagon 400 series Ls swapped 68 Camaro 327/4 speed- 1 owner, original paint 66 Volkswagen bettle 69 auto stick Volkswagen Beetle |
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