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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!
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| | | | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | An electric temperature guage is connected to a heat variable resistor in the sending unit. The sending unit acts as a ground. More resistance reads cooler temp on the gauge. Direct to ground reads full hot.
The oil pressure gauge works the same but with a pressure variable sending unit. | | |
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