WP29P4A
Full Access Member
- Joined
- Jul 18, 2021
- Posts
- 889
- Reaction score
- 1,514
- Location
- Nevada
- First Name
- Mike
- Truck Year
- 1987
- Truck Model
- Sierra Classic V1500
- Engine Size
- 350 TBI
The 87 trucks with TBI have a test lead connected to the fuel pump relay to test the pumps. Flip the switch to the tank you want to test and apply power to the connector and listen for the pump. Flip the switch to the other tank to test the second pump.
