Re: 1972 GMC Custom Camper Towing Capacity
I tried to find a towing capacity but only found load capacity chart.
These trucks had 3 different rear axles. So, it would be hard to say which one came on your truck. I have the same truck, mine has 4:10 gears and has the corporate rear differential. Equipped with a 350/350 drivetrain setup.
I think your rear bumper was stock, as mine is also welded to the frame. I hate the look, but when I towed a car trailer with it, I figured that bumper wasn't going anywheres.
The heaviest car I towed, was my '70 Chevy Camaro. Believe me, I noticed it behind me. This old truck struggled up one grade. I figure, the Camaro alone weighs approximately 3800 lbs. Plus the car trailer.
Hope this info helps.
Here is a pic of the rear step bumper.
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'72 GMC custom camper 350/350
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