The power door lock actuators may become slow to operate or stop working completely and require replacement.
Resources for the Repair and Maintenance of your 1991 GMC 2500 Pickup
1991 GMC 2500 Pickup
1991 GMC 2500 Pickup Problems
Power brake systems using "hydro-boost" may leak power steering fluid from the hydro-boost unit located behind the brake master cylinder. Replacement of the hydro-boost unit is the common repair to correct this concern.
The inside and outside door handles are prone to breaking.
The anti-lock brake system (ABS) front wheel speed sensors are prone to failure. When a sensor fails, the ABS warning light may illuminate and/or the ABS system may activate erratically.
A coolant leak may develop from the water pump. This can result in an engine overheating condition. A leaking water pump will require replacement.
1991 GMC 2500 Pickup Questions and Answers
I have checked the fuses inside relays and maxi fuse outside and they are all good. I get no power to the switch but I can jumper to the motor and it does spin.
We have changed the spark plugs, wires TPS, distubutor cap fuel filter and rotor. We checked the onboard codes and it said the TPS was bad, but we have put a new TPS in and it still does the same t...
I think the question is pretty self expanitory...thank you