1990 GMC Vandura 3500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 GMC Vandura 3500
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1990 GMC Vandura 3500 ProblemsIdling Problems Due to Vacuum Leak in Throttle Body Gasket
An engine vacuum leak may develop from the throttle body gasket causing a higher than normal idle speed. Failed gaskets should be replaced.
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.
A coolant leak may develop from the water pump. This can result in an engine overheating condition. A leaking water pump will require replacement.
1990 GMC Vandura 3500 QuestionsThank you I have code 15 and code 22 on my 88 Vandura. Can you help me identify? (1 answer)
Thank You in advance
i have no heat. I replaced the heater control valve in front of the heater core outlets (wich I flushed) she comes up to operating temp just fine. Should have good heat but nothing. Is it possibly something in the heater controls?? All my doors work when I use the controls and the heater valve ...