A coolant leak may develop from the water pump. This can result in an engine overheating condition. A leaking water pump will require replacement.
Resources for the Repair and Maintenance of your 1990 GMC Rally Wagon 2500
1990 GMC Rally Wagon 2500
1990 GMC Rally Wagon 2500 Problems
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.
An engine vacuum leak may develop from the throttle body gasket causing a higher than normal idle speed. Failed gaskets should be replaced.
The alternator may fail causing the battery to go dead. The charge light on the dash may or may not illuminate. The alternator may also develop an abnormal noise. A failed alternator will require replacement.
An oil leak may develop from the distributor o-ring seal requiring replacement of the seal.
1990 GMC Rally Wagon 2500 Questions and Answers
I put the steering box back in the van, but now it turns sharper to the right than the left. Dose it take shims in between the frame and the steering box? I don't remember taking any off.
I actually have a 1984 GMC Rally STX, but I figure the vehicle and years are close enough. Where can I purchase a used/new pump seal for my Turbo 700R4 transmission?
1990 GMC Rally Wagon 2500 Reviews
Got a 1 owner 1988 5.7L GMC Van from my GF's father who passed away. 85,000 miles and would still look new if it wasn't for the paint fading. This thing runs great and everything works, I love it. Her dad maintained this thing well.