Cooling Fan problems of the 2004 GMC Envoy

The contact owns a 2004 GMC Envoy. The contact observed while driving the speedometer displayed an inaccurate reading regardless of the speed being traveled. In addition, there was a malfunction with the headlights remaining "on" when deactivated. The failure occurred intermittent. The fan clutch failed unexpectedly. The vehicle was taken to an independent mechanic for inspection. The fan clutch was replaced. The contact had concern of the safety risk involved. The failure mileage was 50,000. The current mileage was 57,000.

I purchased a 2004 Envoy with 18,000 miles in the summer of 2006. Beginning in January 2007, my 3 year old son let me know that he was cold while riding in the back seat and begged that I turn off the air. Turns out that the vent in the back of the car was blowing ice cold air on my son. The temperature outside was approximately 10 degrees. I called and scheduled a time to take my car into the dealership, as it was still under warranty. I found out that the vehicle had a "bulletin" stating that GMC was familiar that there was heat failure in the back of the cars, but the company was choosing not to do a full recall. Instead, they were waiting for customers to discover the problem and bring it in for repair. They had to install a special pump, however, this still did not fix the problem. Instead, it just modified the temperature of the air from approximately 20 degrees to maybe 50 degrees. Not a lot of comfort in a minnesota winter. I was informed that bottom line, it was a design flaw with the vehicle, and that I could just try to force the air from the front of the car to the back seat. What is the point of having vents in the back of the car, and having a separate heating element specifically for the back of the car? I purchased this car because I thought that with the vents in the back, it would help heat the car faster in the winter, helping to keep my son warm. I do not believe that heat should be a luxury, and am disappointed that GMC would not do more to correct the problem. I want it to be known to the general public that this is a problem in the Envoy and trailblazer, especially for families with small children who do not have a voice to let their parents know the icy air blowing on them.

Headlights, driving lights and all interior lighting dim and flicker approx every 30 seconds. Has been this way for over 10 days, dealer cannot diagnose problem until the "service engine soon" light comes on, which it hasn't. It is nearly impossible to drive at night with dim, flashing, headlights, and is confusing to other drivers. Also, a fan can be heard blowing off & on approx once every minute, and this is with the vehicle completely turned off and the key out of the ignition. This is constant, I'm concerned the battery will be dead and the car won't start, or that the lights will completely go out while I am driving at night. Rear passenger door locks suddenly stopped working with the remote and the door unlock switch on the driver's door. I have to climb over the front seat into the back to physically unlock the door to remove my children from the car.

2004 GMC Envoy developed the following problems: vehicle stalled, turn signals stopped working, blower fan stopped working, and the srs light remains lit. The turn siganls stopped working due to a short in the flasher. The powertrain control module was replaced due to the ses light iluminating. The blower motor fan failed 4 times due to a short in the wires and control head. The vehicle overheated, but the problem could not be diagnosed. The lcd displays, knobs become extremly hot after hours of driving.