Ignition Problems of Chevrolet 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.

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Interior heat & a/c blower motor fan suddenly turned on full without warning. Could not turn off. Would not stop even with key removed from ignition.

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The contact owns a 2001 Chevrolet Silverado 2500 hd. While passing two tractor trailers at 55 mph, the vehicle shut off. The contact was able to slow the vehicle down and maneuver to the shoulder. He waited until the vehicle restarted. The dealer stated that the ignition sensor was faulty and a hole would need to be cut in the floorboard to make the necessary repairs. The contact refused to sustain more damage to the vehicle. The failure mileage was 58,000 and current mileage was 70,000.

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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.