SJSnelling
Junior Member
- Joined
- Jul 31, 2018
- Posts
- 7
- Reaction score
- 2
- Location
- North Charlestown NH
- First Name
- Steven
- Truck Year
- 1987
- Truck Model
- 3500 High Sierra
- Engine Size
- 350 TBI
1987 GMC TBI dual tanks
Fuel gauge was reading above full on both leaking tanks. I ordered replacement tanks and pumps. Installed the left.
Fuel gauge continued to read above full on both tanks. After viewing a schematic, I traced wires and found two (pink and tan) had been cut in the engine compartment. Cleaned and connected those. Fuel gauge now reads empty for both tanks. If I unplug the right (leaker) tank electrical connector, the gauge shows over full on that tank, and empty on the new tank.
I'm not certain how to proceed with troubleshooting. Any suggestions would be greatly appreciated.
Fuel gauge was reading above full on both leaking tanks. I ordered replacement tanks and pumps. Installed the left.
Fuel gauge continued to read above full on both tanks. After viewing a schematic, I traced wires and found two (pink and tan) had been cut in the engine compartment. Cleaned and connected those. Fuel gauge now reads empty for both tanks. If I unplug the right (leaker) tank electrical connector, the gauge shows over full on that tank, and empty on the new tank.
I'm not certain how to proceed with troubleshooting. Any suggestions would be greatly appreciated.