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 1991 Chevrolet 3500 Pickup
1991 Chevrolet 3500 Pickup
1991 Chevrolet 3500 Pickup Problems
The inside and outside door handles are prone to breaking.
The anti-lock brake system (ABS) front wheel speed sensors are prone to failure. When a sensor fails, the ABS warning light may illuminate and/or the ABS system may activate erratically.
Power brake systems using "hydro-boost" may leak power steering fluid from the hydro-boost unit located behind the brake master cylinder. Replacement of the hydro-boost unit is the common repair to correct this concern.
The power door lock actuators may become slow to operate or stop working completely and require replacement.
1991 Chevrolet 3500 Pickup Questions and Answers
4 wheel drive automatic transmission Speedometer works fine , Odometer does not. Is it electrical or is it driven by a cable?
Vehicle won't run. I have several error codes and am not sure what way to go. Codes are- 33,32,31,46,43,36
After driving for 15/20 miles the C.E.L comes on, if I stop, turn the engine OFF and then restart it, the C.E.L stays OFF for another 20/25 miles, then comes ON again...and I think I smell a "...
1991 chevy 3500 dually 4 speed straight transmission with a 454 engine.
How do you take a 4 speed straight transmission out of a 1991 Chevy 3500 dually 2 wheel drive truck with a 454 gas engine?