I was making a slow left hand turn from a stop sign and my 2003 GMC Envoy drive train had locked up causing the vehicle to come to a dead stop in the middle of the road. When this occurred I noticed the lights flashing for the 4WD and 4lo switch even though the switch had not been touched. The vehicle corrected itself and 15 sec later as I was making a left turn into my driveway the vehicle drive train locked up once again. To remedy this I put the car in park and there was a loud clunk and the lights went out and operation went back to normal.

- Canton, OH, USA

The consumer experienced a problem with the four wheel drive. The owner says that the light for servicing comes on and the vehicle has been to the dealer for servicing on 9 occasions in the last 18 months. The dealership doesn't seem to know what the problem is all about. The diagnosis are as followed: On three occasions no problem was found, there were three transfer case repairs, there was a faulty ignition switch found related, wiring had to be replaced and a vdb was installed.

- Kaysville, UT, USA

4-wheel drive light, my 2003 $35,000 Envoy's service 4-wheel drive light came on the first time at 574 miles. The second time at 4,242 miles. The third time at 6,490 miles. The fourth time at 9,387 miles. It was then towed in for a fifth time just after that for several other problems. It went through three ignition switches in one week. It has had the transfer case modules, actuators, front hubs and more done. It has been reprogramed each time as well. I have only owned the vehicle for 9 months. I contacted GM about this and was told about a repurchase then told no. I hate my Envoy and I will never purchase another GM product!!!!!!! everyone that asks me about it I tell them my story so I hope it gets around how bad this is and how bad this sucks! my dealership has been helpful but the reps from GM suck! I was never given a reason as to why the GM rep (moiz ahmad) said "no" and I was told that he not only doesn't have to give a reason that he doesn't have to call me when I asked for him to. And... they will not give me any information to even contact this guy. "they don't have to". then when I complained that this was "unexceptable" and asked to speak with a supervisor the supervisor hung up on me!!! I was not very suprised to see that I am not the only one with this problem. I looked up the service bulletins and recalls (at alldata.com) and there were several bulletins on this. GM needs to get the Envoy act together!!!! I am going through NY state lemon law now. Wish me luck!

- Warsaw, NY, USA

While driving the 4 wheel drive automatically engaged. The consumer tried to manually disengage it several times. The dealership was notified, but has been unable to resolve the problem. Please provide any additional information.

- Hickory, PA, USA

When vehicle started up, 4-wheel drive light came on. Diagnosed as no codes stored in atcm. Old atcm programming scanned for codes no codes stored. Reflashed atcm with new update.

- Clinton, IN, USA

When the light went out on the 4-wheel drive, the consumer had to the shut vehicle off and restart the 4-wheel drive. During snow conditions, the owner found out the vehicle would not shift to 4 wheel drive when the indicator light was on. In order to restore 4 wheel drive the vehicle must be shut down and started again until it lights up. The vehicle has been worked on three times with no repair orders provided.

- Meadville, PA, USA

While driving down freeway my check 4WD light came on. So now it is in the dealership for 2 days, with only 1600 miles on the vehicle... no 4 wheel drive ever used yet...it not going the way I expected for the price of this vehicle.

- Rowland Heights, CA, USA

The 4-wheel drive intermittently malfunctioned. Dealer indicated to the consumer that the manufacturer was aware of the problem, but had no remedy.

- Fairbanks, AK, USA

My husband and I purchased a 2030 Envoy slt in May 2003. The 4 wheel service light has come on twice. The first time, it was repaired. The 2nd time it came on, we were told we have no 4 wheel drive. We have been in contact with GMC customer service dept (1-866-996-9463, our representative is brandy johnson and our ref $ is 1-127444813). The resolution; we need to wait until the service 4 wheel drive light comes on again so we can take it into the dealer (if they are open) so a "code" can be read. I feel with winter coming, this issue has now turned into a safety issue as we will use this vehicle daily to take our son to daycare and go to work. I would appreciate any input you could assist me with as I strongly feel this vehicle should be replaced.

- East Berlin, PA, USA

With about 1100 miles on my brand new car, the 4WD light came on. Not happy about this purchase.

- Dayton, NJ, USA

When my vehicle had less than 200 miles on it the check four wheel drive light came on. Whe had only had the car for less than a week. I asked the dealer and they said that as long as it was running fine the would put it on the computer at my 3,000 mile checkup. A few weeks later I started hearing a rubbing noise. I brought it in and they took it for a test drive. They told me that they had swiched it from 2 wd to 4WD high and the noise was gone. It was not. The next day I switched it into AWD and there was no noise. That afternoon the front wheels locked up on me when I was going about 30 mph. We had the vehicle towed back to the dealership. They told us that the front differental was litteraly falling apart and have now said they are going to replace the transfer case. The milage on our Envoy is 1263. Needless to say, I am not happy. I purchased a new vehicle so I would not have problems. I have only had it for a month.

- Leicester, MA, USA