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Click on image for the lowdown. 
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11 members (GMCJammer51, Steveoreno, 4tttt8, Jay R, Joe H, dt235sd, Peggy M, 55shaker, FAST55, 1955 1 Series, Waveski),
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Global Mod,
Mod | | | Forums66 Topics128,180 Posts1,057,164 Members48,465 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Oct 2006 Posts: 1,847 'Bolter | | 'Bolter Joined: Oct 2006 Posts: 1,847 | the gauge in the full pressure trucks only goes to 60 psi. I may be wrong, but I am pretty sure the relief lifts at 45 psi. The GMC oil pumps are set at 60 (?) however. | | |
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