1990 Chevrolet G Series Van (G20) Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 Chevrolet G Series Van (G20)
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1990 Chevrolet G Series Van (G20) ProblemsIntake Manifold Gasket May Leak Coolant or Engine Oil
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 distributor may develop internal faults. This can cause a rough running engine or stalling condition, the Check Engine Light may or may not illuminate. Our technicians tell us that the distributor should be overhauled or replaced to correct this concern.
1990 Chevrolet G Series Van (G20) QuestionsWhat are the shift points in MPH for the auto transmission, ie. 1st to 2nd MPH? (1 answer)
I recently had the automatic transmission rebuilt. The engine revs and the transmission does not shift out of 1st to 2nd until 20 MPH. The tech says this is about correct. I sense that the engine is reving too much in all the gears when shifting up. What are the approximate proper shift poin...
While trying to replace my thermostat, I tried to remove the intake manifold and one of the bolts broke off. Now I must figure out how to remove this bolt without damaging my intake manifold.