aasleson
Full Access Member
- Joined
- Mar 27, 2025
- Posts
- 112
- Reaction score
- 521
- Location
- Minnesota
- First Name
- adam
- Truck Year
- 1986
- Truck Model
- k30
- Engine Size
- 6.2
To make that C65 fuel gauge work correctly, remove the resistor bolted to the back of the gauge, replace it with the resistor from your original fuel gauge.
The variable resistor in the C65 tank has a longer range of resistance (longer movement). The different resistors have a different color painted line.
This was one of GM's innovations when they first came out. It also did not need a small voltage regulator to power it. Kept the fuel needle from bouncing around too.
Thank you for the info! I will do that, I was going to pull the speedo from the burb and the temp gauge from the c30 that my 454 came from
. Now I need to find an appraiser, fill out paperwork, and hope that they agree and give me some sort of refund.