1993 GMC Rally Wagon 3500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1993 GMC Rally Wagon 3500
Verified by mechanics, reported by drivers like you
1993 GMC Rally Wagon 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.