GMC Sonoma owners have reported 4 problems related to defogger (under the visibility category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of GMC Sonoma based on all problems reported for the Sonoma.
The contact owns a 2003 GMC Sonoma. The contact stated that the defroster failed in the vehicle. The dealer stated that they needed a new havac control head, three mode actuators, and the storage tank and switch line needed to be flushed out. The current mileage was 102,000 and failure mileage was 100,000. Updated 12/17/08. Updated 12/18/08.
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There is no non heated fresh air that can come into vehicle while consumer is driving no matter what consumer does. Consumer had an accident in which vehicle rear ended another vehicle at about 5 mph. Contacted dealer, and dealer really did not have a remedy for problem. Air ventilator malfunctioned.
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Radio goes on and off, will turn on by itself, and sometimes could smell like a burning not knowing where it is coming from. Also, headlights will blink on and off. Inside lights and radio flicker. The dealer diagnosed that there was suspension problem and the passenger side heat source was inoperable.
The ventilation system in the vehicle works at start up but about 20 min. Later the forced air flow stops, the motor still makes the sound as if it is still in operation but there is no air flow, fog build up on the windshield can not be cleared causing poor visibility. Nlm.