Three problems related to power train have been reported for the 2003 Chevrolet Avalanche. The most recently reported issues are listed below.
This is the second transmission, the clip that holds the transmission line to the radiator breaks allowing the line to come off resulting in all transmission fluid being lost and resulting in destroying transmission.
The vehicle was stopped at a 2-way stop. Upon turning right, my foot went from the brake to the gas pedal and got hooked on a piece of metal extending from the arm of the accelerator. This caused my foot to be trapped below the brake pedal but attached to the gas pedal. The vehicle spun back and forth while trying to get my foot off the accelerator. I hit a truck coming from the opposite direction from which I was turning pinning it to the guard rail. Although both trucks had stopped, the tires on my truck were still spinning because my foot was still hooked on the accelerator and wedge below the brake pedal. Only after I turned the key off could I put the truck in park. In order to get out of my truck I had to unlace my shoe and pull my foot out, then pry it off the side of the accelerator, leaving a hole in the side of my shoe.
I have had several issues with my 2003 chevorlet Avalanche z71 only 62,000 miles. My problems started around 8,000 miles with the rear brakes going bad. I have replaced the front and rear brakes four (4) times since I have owned it. The abs speed sensors have been replaced once and need replaced again. The speedometer is stuck at 120 mph, the u joints have been replaced and now the transmission has gone out. I feel that chevorlet should fix these problems under a warranty/recall.