GMC Vandura 3500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your GMC Vandura 3500
GMC Vandura 3500 Problems
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.
A coolant leak may develop from the water pump. This can result in an engine overheating condition. A leaking water pump will require replacement.
GMC Vandura 3500 Questions
When I start my truck in the morning it will not shift out of low gear. when it gets to 170 degrees I can shut the truck off and turn it back on and it will shift normally. But if I do not shut the truck off it will not come out of low gear.
he can't find a wiring diagram and needs to know how to fix the horn.