66’ GMC 4WD Frame Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**aotte1** · 05-22-2020, 11:57 PM

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.

**VictoriaHardware** · 05-23-2020, 03:51 PM

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.

**aotte1** · 05-23-2020, 10:41 PM

VH,
Thanks for reply. That makes sense.

Thanks

whateverpratt · 07-04-2020, 09:10 AM

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

**aotte1** · 07-30-2020, 02:52 AM

Yes I will sorry for late response. I think that are different. Will post photos.

**aotte1** · 07-31-2020, 07:00 PM

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

Will pull a tape measurement tomorrow, cl holes.

whateverpratt · 07-31-2020, 07:45 PM

Thanks, that helps a lot

05-22-2020, 11:57 PM	#1
aotte1 Registered User Join Date: Oct 2013 Location: lousiville Ky Posts: 2,645	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. Attached Images Last edited by aotte1; 05-23-2020 at 01:06 AM.

05-23-2020, 03:51 PM	#2
VictoriaHardware Senior Member Join Date: Nov 2012 Location: Southeast Michigan Posts: 792	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.

05-23-2020, 10:41 PM	#3
aotte1 Registered User Join Date: Oct 2013 Location: lousiville Ky Posts: 2,645	Re: 66’ GMC 4WD Frame Question VH, Thanks for reply. That makes sense. Thanks

07-04-2020, 09:10 AM	#4
whateverpratt Registered User Join Date: Jul 2013 Location: Deltona, FL Posts: 235	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 __________________ '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

07-30-2020, 02:52 AM	#5
aotte1 Registered User Join Date: Oct 2013 Location: lousiville Ky Posts: 2,645	Re: 66’ GMC 4WD Frame Question Yes I will sorry for late response. I think that are different. Will post photos.

07-31-2020, 07:00 PM	#6
aotte1 Registered User Join Date: Oct 2013 Location: lousiville Ky Posts: 2,645	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. Attached Images

07-31-2020, 07:45 PM	#7
whateverpratt Registered User Join Date: Jul 2013 Location: Deltona, FL Posts: 235	Re: 66’ GMC 4WD Frame Question Thanks, that helps a lot __________________ '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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