1990 Chevrolet G Series Van (G20) Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 Chevrolet G Series Van (G20)

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.

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.

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My Chevy g20 has engine failure. Engine is almost out but it's not fitting through dog house, new engine is in crate ready to be installed next to engine. transmission is leaking and may need replacement. Needs all new wiring in engine area, Needs entire front end dissembled to replace engine...

instructions say that it is necessary to install a set screw in the sector gear before disassembling it from the regulator is this really necessary

This just started happening after I got an oil and coolant change. Had previously changed the starter recently.

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SEAT BACK OF THE REAR BENCH SEAT MAY BREAK AWAY FROM THE SEAT CUSHION IN AN ACCIDENT.IMPROPERLY TORQUED TIE ROD CLAMP FASTENERS COULD ALLOW THE TIE ROD TO LOOSEN AND EVENTUALLY SEPARATE.

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i have a 1990 chevy g20 van and since iv had it i took it for a test drive the first day i have had it and only went about a mile and a half from home and started going up hill is when i had lost power and costed to the side of the road and would start it had sounded like i was out of gas>when i had finally made it home finally after getting it towed i had a mechanic come out and look at it and...

I had the same issue as with the idle, turned out to be a combination of a bad EGR valve and I replaces the pick up coil in the distrbutor for 22.00, just knocked out the dist. gear pin with a punch and hammer, put the new one on and it purred like a G20 kitten. Before you do that though check your fuel pressure to be between 9-13 if its lower that may be the prob.

I had the same thing happen on our 1991 g20. Found a fuse for the fuel pump was all it was! Hope this helps!

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