One problem related to defogger has been reported for the 2005 GMC Sierra 3500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 GMC Sierra 3500 based on all problems reported for the 2005 Sierra 3500.
The contact owns a 2005 GMC Sierra 3500. The contact stated that the heater and defrost failed numerous times, the heater wiring harness was replaced five times, but the failure wasnt corrected. The dealership wasn't able to diagnose the exact location of the failure. The manufacturer will not assist with the repair, because the vehicle warranty expired. The vehicle wasn't repaired. The failure mileage mileage was 38,000 and the current mileage was 41,000.