The inside and outside door handles are prone to breaking.
Resources for the Repair and Maintenance of your 1991 GMC 1500 Pickup
1991 GMC 1500 Pickup
1991 GMC 1500 Pickup Problems
The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Running the engine with a coolant/oil mix may result in engine damage. Replacing the intake manifold gasket should correct this issue.
The windshield wipers may not work intermittently due to a faulty wiper motor control board. Our technicians tell us that lightly taping on the wiper motor when the fault occurs should temporarily get the wipers working again. Some vehicles were recalled for this problem and some were not. You will need to check with your local dealer to find out if a specific vehicle was included.
The fuel pump may fail causing the engine to stall and not restart. Our technicians recommend replacing the fuel filter every 30,000 miles to help prevent undue strain on the fuel pump.
The quick-connect fittings for the heater hoses tend to leak engine coolant. This problem commonly occurs because the metal housing has become brittle, which can break and cause leaks.
1991 GMC 1500 Pickup Questions and Answers
No gas will spray out of injections. How can I repair this?
Fuel injections are getting fuel but, the truck still will not stay started.
I also want to know where the ECM is located on the truck?
new fuel pump, new fuel filter, new rebuilt throttle body, new control module in the distributor, new fuel injuetors, new fuel relay....injections do not work......what am I I missing???