Transfer Case problems of the 2003 GMC Envoy

Bought my GMC in April of this year 2007. Never had to use the 4x4. Unfortunately with 9 inches of snow tried the 4x4 for the first time and it did not work. Took it to the dealer and they said it was the transfer case was not working and needed to be replaced a 600 estimated service.

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.

I have a GMC Envoy 4wd, on 2 occasions the vehicle has locked the gear into 4wd and 4hi. Vehicle will not respond to command to shift gears to normal driving in 2wd. In turn this leads to problem with the vehicle braking system--vehicle takes too long to stop during normal braking. The vehicle also becomes very unstable on the road--keeps shifting sides making hard to keep the vehicle in a straight alignment during driving. I had the vehicle inspected by a GMC authorized dealer in November, 2005 at which point they found out that there was a problem with the transfer case which causes it to break apart. This in turn causes all the other systems in the vehicle to malfunction because it's a computerized system. The transfer case was replaced which temporarily fixed the problem until Feb, 2006 and the same problem recurred. I have made GMC aware of the problem and they referred me to the dealer. On speaking with the dealer I became aware that this is an ongoing problem with GMC Envoy and the dealer is aware of the problem. The only way GMC is resolving the problem is referring customers to the dealer for a replacement on the transfer case--which happens to be the same one that keeps malfunctioning. At this point GMC does not have a different transfer case that will resolve the issue once and for all. GMC is also willing to fix your vehicle as long as it's under warranty but once it's out of warranty and the problems with the transfer case persist, you have to pay out of pocket. GMC is aware of this problem with the transfer case but they are not letting the consumers know.

Electronic problem with 4wd was supposedly corrected in 2004, transfer case for 4wd was replaced in April 2005, and 4wd failed again during first day trying to use it during icy conditions after it was "repaired" in April. Had to drive on dangerous, slick roads without 4wd from fairbanks to palmer, ak. This is a major safety issue in alaska where winter driving can be very hazardous without 4wd. Have had it into dealer several times for loud squeak under vehicle when making turns or going over bumps at slow speeds. No corrective action by dealer. Could not get vehicle out of "park". Had to have it towed to dealership. They disconnected something and told me to be careful because whatever they did would allow the vehicle to be put into "drive" without having brakes engaged! had to drive it this way for several weeks until they got replacement part. Have had other problems with climate control, wind noise around windows, and more. None repaired satisfactorily.

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.

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 Envoys act together!!!! I am going through NY state lemon law now. Wish me luck!.

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.

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.

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.

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.

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.

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

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.

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