1989–1991 GMC S6
Common problems, technical service bulletins, fluid specs and labor times — verified for your car.
Top Problems (5)
Faulty Fuel Pump
high
AI-written
Transmission Issues
medium
AI-written
Leaking Power Steering System
medium
AI-written
Faulty Ignition Switch
medium
AI-written
Water Leaks
low
AI-written
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