The contact owns a 2005 GMC Envoy. The contact stated that the automatic door locks failed to lock and unlock the vehicle. In addition, the rear hatch door failed to unlock when initiated. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was 88,000.

- East Freetown, MA, USA

In June of 2007 I could not close either of the rear doors on my vehicle. They failed approximately two hours apart. I was transporting two grand children at the time. Thank heaven they were young enough to require car seats. We were at the mercy of strangers on the highway. With donated rope to secure the doors we made it home. The dealer replaced both door lock assemblies. I paid $125 for labor only. The dealer must have replaced the door lock assemblies with the same faulty part. On 10/12/10 the left rear door failed again! after tying the door and using duct tape to secure it I drove the 30 miles to the nearest dealer. Although I had to pay $295.35 to replace the left rear door lock assembly the dealer was able to do it immediately. I am now carrying rope and duct tape in anticipation of failure of the right rear door lock. My vehicle is well taken care of. Maintenance is followed religiously. (there is nothing in the manual to indicate door locks should be checked. Lubricated but not checked for possible failure.) these failures are in no way my responsibility. This is a faulty design that can very well end in injury. I would have assumed that GM would have been concerned and if not issue a recall take responsibility for the defective locks. Have dealer service departments check these locks when vehicles are brought in for normal maintenance. Not only do they not take responsibility they actually replace the locks with the same lock assembly that is doomed for failure.

- Caledonia, WI, USA

Car switches into all 4W and higher by itself. I had been to a dealership 3 times in one year for which they were unable to find the problem. Now my warranty is up. After that I took it to a transmission shop where they supposedly fixed the problem for over 800.$ a week later it did it again. Now I have the 4WD disconnected for safety reasons. I would be driving on the freeway at 60-75 mph and if would switch and not come out no matter what I do. I have owned this vehicle for almost 5 years and it has done this the whole time. I am a single mom and I drive my 17 and 7 year old around in this car. Even with it disconnected it still tries to switch. There is no specific time, temperature, or other reason this happens. It has happened when I turn on the car and sometimes I can go a couple of weeks and other times it happens daily. I also have had my lights not go on for no reason and also the doors lock and can only be unlocked by using the key. And the hatchback will not open at all when this happens. Electrical?? help!!

- Tucson, AZ, USA