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Click on image for the lowdown. 
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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!
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#13433 02/16/2004 5:18 PM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | Atmospheric radiator means unpressurized, or atmospheric pressure only.
Break-in oil was usually in the engine in delivered vehicles. Not sure about GMC, but Chevies had it.
Fred
52 3600
69 C-10
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