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 ProblemsFlush brake fluid every 60,000 miles
An engine vacuum leak may develop from the throttle body gasket causing a higher than normal idle speed. Failed gaskets should be replaced.
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 ...