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Old 05-22-2020, 11:57 PM   #1
aotte1
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66’ GMC 4WD Frame Question

This is a 1966 GMC 4WD K10 Suburban. The photos below are of the rear frame where the suburban frame extension is riveted to the 1 ton frame used for the 4WD model.

Question is the square cut off tubing ( U shape) on the under side of the frame original to 4WD Suburban? Note: 4WD Suburban frames are different then 2WD frames. It is high lighted in yellow. If so what purpose? (spare tire, gas tank) Any photos of it complete. Alternate, it is not factory original, possible some type of support for aftermarket bumper. Will do a more detailed review of this feature, welds, cuts, position on frame, etc.

NOTE:The last photo shows on 1966 GMC Suburban 4WD where the the Suburban frame extension connect with the 1 ton frame. The suburban extension appears to be some what similar to 1/2 ton 2WD rear frame area. There are some difference, the upper and lower frame flanges are wider on 4WD extension. Will plan to post photos of differences.
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Last edited by aotte1; 05-23-2020 at 01:06 AM.
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Old 05-23-2020, 03:51 PM   #2
VictoriaHardware
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Re: 66’ GMC 4WD Frame Question

I have a '66 K10 Chevrolet Suburban. There is no evidence of a similar piece of tubing there. I'm guessing it's part of an old trailer hitch.
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Old 05-23-2020, 10:41 PM   #3
aotte1
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Re: 66’ GMC 4WD Frame Question

VH,
Thanks for reply. That makes sense.

Thanks
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Old 07-04-2020, 09:10 AM   #4
whateverpratt
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Re: 66’ GMC 4WD Frame Question

Any chance I could get you to post a few pics of the cab/body mounting brackets on your 4x4 frame? I'm specifically trying to figure out if the pickup truck rear cab mount is in the same location on the frame as the suburban/carryall
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'66 c10 rust bucket, 350 (pulled and sold, now waiting on 4bt install) nv4500 stock bellhousing, '85 c30 front suspension and 3/4 rear coils with 4.10 H072 rear axle
NV4500 install http://67-72chevytrucks.com/vboard/s....php?p=6488778
Suspension update http://67-72chevytrucks.com/vboard/s....php?p=8236775
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Old 07-30-2020, 02:52 AM   #5
aotte1
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Re: 66’ GMC 4WD Frame Question

Yes I will sorry for late response. I think that are different. Will post photos.
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Old 07-31-2020, 07:00 PM   #6
aotte1
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Re: 66’ GMC 4WD Frame Question

66 GMC Suburban/carryall 1/2 ton K10 photos frame body mountS.
Positions 1 and 2.

Will pull a tape measurement tomorrow, cl holes.
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Old 07-31-2020, 07:45 PM   #7
whateverpratt
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Re: 66’ GMC 4WD Frame Question

Thanks, that helps a lot
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'66 c10 rust bucket, 350 (pulled and sold, now waiting on 4bt install) nv4500 stock bellhousing, '85 c30 front suspension and 3/4 rear coils with 4.10 H072 rear axle
NV4500 install http://67-72chevytrucks.com/vboard/s....php?p=6488778
Suspension update http://67-72chevytrucks.com/vboard/s....php?p=8236775
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