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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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| | | | Joined: Sep 2008 Posts: 872 Shop Shark | | Shop Shark Joined: Sep 2008 Posts: 872 | My manuals for 1.5 ton Chevvys is to run 160 stock and if a heater is installed use 180.
The gauge will bounce around but should stick right around the t-stat set point unless idling for a long time, going up a hill (high power output, low forward speed for cooling).
When you turn off the motor is most likely will shoot up to 200+ unless you idle for a few minutes to let the motor cool. | | |
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