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.
Resources for the Repair and Maintenance of your GMC Rally Wagon 2500
GMC Rally Wagon 2500 Models:
GMC Rally Wagon 2500 Problems
The Fuel Pump May Fail Causing the Engine to Stall or Crank Over But Not Start
Engine --
Verified
The fuel pump may fail causing the engine to stall and not restart. Our technicians recommend replacing the fuel filter every 30,000 miles to help prevent undue strain on the fuel pump.
Coolant Leak & Engine Overheating
Engine --
Verified
A coolant leak may develop from the water pump. This can result in an engine overheating condition. A leaking water pump will require replacement.
Driveability Problems Due to Internal Distributor Fault
Engine --
Verified
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.
Highter Than Nornal Idle Due to Vacuum Leak
Engine --
Verified
An engine vacuum leak may develop from the throttle body gasket causing a higher than normal idle speed. Failed gaskets should be replaced.
GMC Rally Wagon 2500 Questions and Answers
Ladelle, 1990 GMC Rally Wagon 2500, 5.7L V8, Escondido, CA
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.
rally84, 1990 GMC Rally Wagon 2500, 5.7L V8, Marysville, CA
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?
mesio29, 1990 GMC Rally Wagon 2500, 5.7L V8, Evans City, PA
I just changed our heater fan and i get air but no heat just air
Marge B, 1993 GMC Rally Wagon 2500, 5.7L V8, Bunker Hill, IL
key was broke off n ignition and I removed it with tweezers and set off anti theft alarm (that I didn't know it had). I need to know how to reset it so it can b driven again as it is a wheelc...
Phella, 1991 GMC Rally Wagon 2500, 5.7L V8, Chicago, IL
the vents in the front will blow warm air for a couple seconds then it get cool.while the rear vents blow heat all the time
Write a Review About Your Car
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.
GMC Rally Wagon 2500 Model Years
Recent GMC Repair Estimates