1990 Chevrolet 1500 Pickup Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 Chevrolet 1500 Pickup
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1990 Chevrolet 1500 Pickup ProblemsHighter Than Normal Idle Due to Vacuum Leak
The throttle body gasket may develop a vacuum leak which may result in a higher than normal engine idle. Failed gaskets will require replacement.
One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail. This can result in incorrect air delivery or temperature. If this occurs, fault code(s) stored in the HVAC control module should be available to assist with diagnoses.
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. Our technicians tell us that operating the engine with a coolant/oil mix can result in internal engine damage. Replacing the intake manifold gasket should correct these leaks.
1990 Chevrolet 1500 Pickup QuestionsMy brake lights stay on. I changed the brake switch. didn't help. What do I do? (1 answer)
it runs rough at low rpms but its ok at higher rpms
1990 Chevy 1500 4.3 V6 Kept having to get a jump to start it so I replaced the battery and after a few days it started needing a jump again to start it so I took the positive off the battery while the truck was running to see if it was the alternator and the truck stayed running with the positiv...