Two problems related to ignition have been reported for the 2004 Chevrolet Silverado 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Chevrolet Silverado 2500 based on all problems reported for the 2004 Silverado 2500.
The contact owns a 2004 Chevrolet Silverado 2500 hd. While driving uphill at an unknown speed, the contact slightly tapped the ignition and the vehicle stalled. The battery warning indicator illuminated. The vehicle was not diagnosed or repaired. The manufacturer was notified. The failure mileage was 50,000.
Under normal driving conditions the hvac system switches from cooling fine to full heat mode. The hvac compressor is still running, however some type of damper servo malfunctions to let in hot air (poss from the heater core area) opens full and replaces the cold air with extremely hot air. It happens about every 7-10 miles on a bad day and once a day on a good day. The only remedy I have found for it is to pull over to the side of the road, place the vehicle in park, turn off the ignition, open the door to kill the interior power, close the door, restart the vehicle. This some how resets the damper servo to its proper operating range.