Problem overview
Some Chevrolet Express 3500 owners report experiencing issues with the rear heater only operating on high, which is likely due to a failed blower motor resistor block. This component is crucial for controlling the speed of the blower motor, and its failure can prevent the adjustment of fan speed. Owners may find that the heater becomes stuck on the high setting, necessitating the replacement of the blower motor resistor block to restore proper functionality and allow the rear heater to operate at varying speeds.
1 person reported this problem
1 commentChevrolet Express 3500 vehicles with this problem
1 model year affected
Average mileage: 120,000 miles
(120,000 - 120,000)
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