The inside and outside door handles are prone to breaking.
Resources for the Repair and Maintenance of your 1990 GMC 1500 Pickup
1990 GMC 1500 Pickup
1990 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.
1990 GMC 1500 Pickup Questions and Answers
I recently purchased a used 1990 GMC 1/2ton pickup (SL Sierra) with a 5.0L engine and 2wheel drive and am seeking to determine the proper gear oil to use in the 5 speed manual transmis...
stalling or irratic idle, is this the fuel injector
replaced bad master cylinder and flushed brake lines, due to really bad brake fluid. but, still no brake fluid at rear end. brake light is illuminated on dash. I'm looking at possibly bad A...
My #6 piston rod keeps spining its rod bearing. What could it be?