GMC Sonoma Repair and Maintenance
A guide to problems, costs, maintenance and repair for your GMC Sonoma
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GMC Sonoma ProblemsThe Fuel Pump May Fail Causing the Engine to Stall or Crank Over But Not Start
The headlight switch used on the GMC Sonoma is known to fail through normal operation. Since the headlight switch is also integrated into the interior lights, a malfunctioning switch can cause issues with interior lights as well.
- Symptoms of a failed headlight switch include:
- Headlights and taillights failing to turn on or off
- Interior lights flicker, or fail to turn on or off
- Gauge cluster lighting off or flickering with headlights on
- Parking light malfunctions
This issue is well known with General Motors Trucks and SUVs, and is solved by testing and, if needed, replacing the headlight/dimmer switch. Bad grounding wires at the tail-lights, and dirty/corroded tow package wires can also lead to some of these issues.
The HVAC blower motor may stop working at one or more speeds due to a faulty blower motor resistor block. Our technicians recommend to confirm the resistor is at fault by first checking the operation of the switch.
GMC Sonoma QuestionsThe battery warning light on the dash comes on goes out repeatedly. What's causi (1 answer)
The battery light comes on for a few seconds then goes out then comes on then goes out. It just keeps doing it.
won't even try to turn over, if battery gets fully charged and key in on position for about 5 minutes then will start but only will run for a day or two
I changed fuel pump because it stopped working. installed new style ac delco pump assembly. fuel gauge worked just fine before that. new connector and wire splicing is correct. truck engine is running not a good gauge reading
GMC Sonoma RecallsAir Bag Labels May Be Incorrect
Vehicles may have an air bag warning label with incorrect statements. This is against the Federal Motor Vehicle Safety Standard. Owners will be sent corrected labels and installation instructions. The recall began June 4, 2004. The GM recall number is 04021.
The payload as listed on the vehicle certification label exceeds the actual limitations of the vehicle. If the weight limitations of the vehicle are exceeded, the vehicle will not operate as designed, and may cause a safety issue. Owners will be sent a revised vehicle certification label that is accurate.