One problem related to defogger has been reported for the 2003 Chevrolet Silverado 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Chevrolet Silverado 1500 based on all problems reported for the 2003 Silverado 1500.
Hvac system suddenly started blowing hot air while on ac position. The only way it could be stopped was to stop the truck, shut off engine & re-start engine.