2003 GMC Yukon XL 1500 Electrical system Problems

“While traveling to work my vehicles check engine light came on and the reduced power warning came on at which time I had complete loss of acceleration, complete loss of braking, and complete loss of steering power. I then had to coast to a stop and attempted to restart the vehicle 6 times before I was able to get the reduced power warning to go off and was able to drive although the check engine light stayed on. This is the 2nd time this has happened to me in 2 days with the loss of power. …”

“When traveling at any rate of speed, the reduce engine power light comes on at I lose all power. I must try and pull over at a safe place, stop the car, turn off ignition and wait 10-15 second before starting and just hope it will return to normal mode. This can happen many times in one day and then it may not happen at all for long periods of time. Very dangerous! I have been driving 70 MPH and had to immediately try and pull over out of speeding traffic, onto a shoulder and stop my car with my children.”

“In oct 06 my speedometer started sticking and 120+ even when sitting still. I checked with a local shop and was advised it would need to be recalibrated which involved taking the dash apart sending it off and being without a vehicle for 5-7 days. I couldn't do that at the time. Several weeks later it just started working again and had worked fine until 12/22/06 and now it is doing it again all the time. I just think for what these vehicles cost these kind of problems should be taken care of. …”

“My speedometer began acting erratically, indicating 80 MPH when sitting at a stop light, sticking while accelerating or decelerating. Sometimes it indicates 20 MPH when I am on the freeway. I researched this on the internet and discovered over 1,000 posts from chevrolet and Gmc owners with the same problem. Apparently there is an effort from owners to demand a recall. I didn't discover this until just after I was involved in an accident. I checked my speed as I approached an intersection and thought I was going a safe speed (I was under the posted limit). …”

“I pulled out of my driveway in my 2003 Gmc yukon xl and only went a short distance when I noticed the engine was very sluggish and the dic showed reduced engine power . I turned around and went home. I shut the vehicle off. When I started it up a little while later it was fine. I called the dealership where I purchased it and they said that this was common and it was due to refueling with the vehicle running or a loose gas cap...neither of these had happened in my case. The next day I had my three children in the vehicle and was driving south on rt. 95 when the vehicle just shut down. …”