1990 Chevrolet 2500 Pickup Questions

Unanswered 1990 Chevrolet 2500 Pickup Questions

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Just replacement fuel pump check service engine light intermittent go off when engine shut off and restarted
I suspect there's a wire missing from the sylenoid. It has positive from battery and the purple wire going into firewall. Been trying to find wiring diagram only for starter and ignition. I have no idea what else can ...
I have an 1985 Chevy truck. The master cylinder went bad causing the fluid to leak out of the back reservior causing the brake warning light to come on. I know the switch is located on a crossmember under the radiator...
1984 Chevrolet custom classic C20 5.7 L. Engine started smoking under hood. Checked under hood and noticed slight oil leak on valve cover gasket and water leak in radiator. About mile from home engine started knocking...
how does the relay work
heater blower works but defrost doesn't,speed control is working
This is actually a 1989. I don't think it should matter...but 1990 was the earliest option. Anyway...standard chevy truck with the digital temp adjustment. I'm about 50% on being able to adjust it up or down. Some...
air conditioner would cycle on & off continuously never really cooling now it needs new fluid
Can you give me a comparable cost for replacing the Actuator, Temperature/Defrost /AC/Value.