1990 Chevrolet S10 Blazer Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 Chevrolet S10 Blazer

1990 Chevrolet S10 Blazer Problems

The heater core under the right side of the dashboard may leak engine coolant which can puddle on the passenger front floor. The loss of coolant may cause an engine overheating condition. Our technicians tell us that removal of the dash board is necessary to replace the heater on these vehicles.

A door window may move slowly or stop in mid travel due to a failing power window motor. The affected window may start working again after the motor cools off. Replacing the faulty window motor will commonly correct this concern.

The transmission output shaft seal may leak transmission fluid. On 2WD models, this leak can cause the transmission mount to become oil soaked, which will require replacement of the mount along with the leak repair. On 4WD models, if this seal leaks, the fluid will leak into the transfer case, causing it to become overfull.

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1990 Chevrolet S10 Blazer Questions

What kind of oil should I use to change the transfer case fluid

Sometimes it'll stall without putting it in drive. I can pull each plug wire off one at a time and it stalls,which makes me think each plug is firing. I recently replaced the coil. I cleaned the portal for the IAC and even replace the IAC. No change. This is a 4.3 V6 engine.

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1990 Chevrolet S10 Blazer Reviews

hello my s10 blazer has aproblem with high idle it will not idle down after i drive it a while

vehicle heats up to over 210 when driving down the road don't know why when idleing it drops below 210

it still runs because i take extreme care of it

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