GMC Yukon owners have reported 97 problems related to vehicle speed control (under the vehicle speed control category).
When driving whether highway or city streets, the car will without notice slow down to about 15mph. A code of "reduced engine power" is displayed on the dash. The car will not go any faster than 15mph, even with you foot on the gas petal. I have had the car in the shop more times than I can count. They keep replacing different parts thinking that it would fix the problem. Almost within a week after being in the shop the same thing happens again without notice. I have noticed that other people are having the same problem. I treasure my kids and I do not want this to happen whenever I am on the freeway going 60 or 70 mph and a semi truck runs into the back of me whenever this happens without any notice. Apparently GMC does not know how to fix this problem. There needs to be a recall on this particular GMC model. Is it gong to take the loss of someone's life before the NHTSA takes a stand on this isssue. I have spent over $2000. 00 in repair bills and have the same issue just this past week. I believe that GMC should isssue a recall on this problem and they repair at the their cost.
See all problems of the 2004 GMC Yukon.
There is an error message that displays on the dash for myself and thousands of others who own GMC/chevy trucks with these motors. They have a defective throttle position sensor with the truck where it says "reduced engine power". I've found 2 technical service bulletins that somewhat address the issue, but many people take their trucks to mechanics and dealerships to get the issue fixed and spend thousands of dollars in repairs and troubleshooting to get the issue resolved, to no avail. The 2 technical service bulletins that I found were #pip3089b (dated 10/31/2006) and #pip3042a (dated 8/30/2004). I've seen on many many forum posts about this issue and possible fixes, which when I read deeper into them, seem to not be true fixes.
See all problems of the 2003 GMC Yukon.
I keep having the display say "reduced engine power". I'll be driving on the highway, doing 65 in rush hour traffic, when all of the sudden the accelerator no longer accelerates and it displays "reduced engine power" on the gauge cluster display. From what I've seen online it appears to be an issue with the throttle position sensor on thousands of other similar vehicles with the same engine, chevy suburban's, silverado's, tahoe's, etc. I replaced the throttle position sensor and the harness (because I heard the harness might also be an issue) and I am still having the same problem with my truck. It has done it over a dozen times on one trip back from work (80 miles for me). I have to pull over to the side of the road (if possible) and turn off the truck, then wait a short period of time, then turn the truck back on. This usually fixes the issue, but it did not help me when it happened to me in the tunnel and I was going 5 mph (top speed during the "reduced engine power" mode, once your drifting stops (because you drift, it doesn't engage the brakes). I was extremely worried that I wouldn't make it out of the tunnel without get rear ended, and once I made it out, I was just outside of the tunnel awaiting roadside assistance, it was very frightening, with my daughter in the car.
While driving today at a speed of 55 mph in somewhat heavy traffic my service traction control and stabilitrack indicator came on as well as a message on the dash saying the same. At which time my vehicle came to slow down and I lost power. I pulled over and and shut the car down and upon restart noticed that not only did white smoke come from my exhaust but the car had a rough idle the same indicators were still on and the engine light had now come on as well and was flashing. I was able to make it home with a rough limp however when I came to a stop felt as though the car was hesitant to keep running or take off. When applying gas there was a thump from the rear wheels like the transmission was not sure how to engage.
See all problems of the 2007 GMC Yukon.
Tl-the contact owns a 2008 GMC Yukon. The contact stated that while driving at approximately 25 mph, while approaching a stop sign the brake pedal was depressed but the vehicle did not stop. The gas pedal was depressed but the vehicle did not accelerate. Another vehicle crashed into the front passenger of the contact's vehicle. The air bags did not deploy. The contact suffered a concussion and the pregnant front passenger sustained back injuries and received medical attention. A police report was filed. The vehicle was towed to an independent mechanic where it was not diagnosed or repair. The manufacturer was not made aware of the failure. The failure mileage was approximately 100,000. Sg.
See all problems of the 2008 GMC Yukon.
I will be driving and my truck will just lose power. I push on the gas pedal and it goes no where. I have to coast off the highway and then I can stop and turn it off for a few minutes then start it back up with the check engine light on. I have changed the tps 2 times, the entire throttle body, and the mass air flow sensor and it's still doing it.
Traveling at about 25 mph in a residential neighborhood, the engine and stabilitrak lights came on and power abruptly cut out. Luckily no one was behind me and I was safely able to pull to the side of the road. I can only image what might have happened if this had occurred on a busy freeway or a crowded intersection.
Tl-the contact owns a 2010 GMC Yukon. The contact stated that while driving approximately 30 mph, the reduced engine power, stabilatrack, and engine warning lights illuminated. The vehicle was unable to accelerate over 10 mph. The contact had then coasted over the emergency lane and shut the engine off. The vehicle had then restarted and the engine warning light was continuously illuminated. The vehicle was taken to the dealer for a diagnosis. The technician diagnosed that the throttle body needed to be replaced and an induction cleaning needed to be performed. The dealer also stated that the failure was common on the vehicle. The vehicle was repaired and the manufacturer was notified of the failure. The approximate failure mileage was 32,730. Pam.
See all problems of the 2010 GMC Yukon.
Low speed activation of abs brakes, on dry pavement, extending the stopping distance to an unanticipated length. Although a collision did not occur, the problem is on going. This sounds like the same circumstances which are included in the manufacturer's recall 05v379000. Even though we are not located in one of the 14 states included in the recall, our state does and has used salt and other corrosive substances to clear roadways of ice and snow for many years.
See all problems of the 2000 GMC Yukon.
I took my daughter to volleyball practice and when I stopped at a red light the car was accelerating even though I had my foot on the brake pedal and it moved on a jumping mode to the front. I got so scared. The car moved forward we could have been involved on an accident on an intersection or hit the car in front of us. As that happened I noticed in dashboard the rmp counter was moving up as if it was were accelerating. It was pretty scary my kids and I don't feel safe to ride on the only car we own. I had a mechanic tell me I should take it to the dealer because it's a safety hazard. That it seem to him as a throttle system failure and it was very dangerous. When I turn vehicle on it happens too.
This is twice that I've received the p2138 throttle body sensor code, which causes reduced engine power and has subsequent issues around stabilitrack/awd. The first time was in the middle of an intersection, we limped out of the intersection at 3 mph. Today, my wife limped home from the store. This is extremely frustrating and should have been recalled a long time ago!!.
While driving on the highway and keping up with traffic, I noticed my speed was 75mph. Slowing down to the posted speed limit I was suddenly getting passed up by everyone. It wasn't untill I exited the highway and while waiting at a stoplight I noticed the speedometer was reading 10mph (while standing still). Checking GMC and Chevrolet forums online, this seems to be a common problem and a definate safety concern. The reading on the speedometer while in park now varies between 10-20 mph, and I have absolutely no idea how fast I'm actually travelling while driving. I've made an appt with the dealer to have it checked out, and I'm sure the repairs will be expensive!.
Tl- the contact owns a 2011 Yukon xl. The contact was driving approximately 60 mph when the accelerate got stuck and the vehicle speed increased. The contact pressed the brakes and the brakes failed so the contact used the emergency brake which slowed the vehicle down, but the vehicle would not stop so the contact jumped out of the vehicle at approximately 35 mph which in a half mile the vehicle crashed. The vehicle was towed and the manufacturer was not contacted. The failure mileage was 70,000. Rk.
See all problems of the 2011 GMC Yukon.
Without warning, check engine light, reduced power and stability system shut down dash board engine light came on and stayed on. Had engine code scanned (p2138, p0102) still problem is not resolved. Dealer was no help just wanted to sell parts that may fix it.
Without warning we experienced a total brake failure due to loss of brake fluid. Pedal went completely to the floor and it caused our vehicle to lose total speed control.
See all problems of the 2002 GMC Yukon.
Vehicle has been serviced several times since first occurrence in September 2014. "reduced engine power" and service engine soon signals appear on vehicle panel causing engine power to be reduced in a matter of seconds. Has happened to me going 10mph, 55mph, and 70mph on highway, causing a near rear collision because I lost power so quickly. I have had it serviced 6 or 7 times since September 2014 and this issue is not getting resolved. Throttle body sensor replaced twice, throttle body harness replaced, all wires, and sensors have been cleaned and thoroughly inspected. Reduced engine power occurs weekly even after being serviced.
My brakes would engage but they will not disengaged and my brakes are buringing and smelling like burnt rubber. Breaks are also sticking. The electrical system keeps blinking on and off. Replace fuse but still not working. Not displaying the correct speed on dash board I'm going slower than the speed say.
I started my car and while I was in park the speedometer said 70mph. While I was driving it would register over 120mph. I had no idea what speed I was truly going. This is a scary feeling especially with my three children in the car. I tried turning off the car putting it in drive and back to park thinking perhaps it was stuck, but nothing works. I see this is a common problem. . . Help??.
As I was driving on 95n of college park, MD, my vehicle power seem to shutdown on the highway and the "reduce power engine" message appeared in my instrumentation panel. Fortunately I was close to the emergency pull off of the left lane to get out of traffic. I turned the truck off and back on, and the message went a way. I was able to continue to with my journey. However, just recently, it has done it again, this time my speed was around 35mph. Once again, I turned it off, than on and the message went away and I had power in my accelaration again. This is very dangerous. I'm taking it back in to the mechanic to have them look at it.
I had just left the free way went onto a 2 lain road we were driving about 50 mpr then we lost engine power,all the dash lights came on ,we pulled over the car killed,didnt know what to do ,so we waited a bout 8 minets then turned the key, the car started and we went on our way,a few minets later it did the same thing, it did it 2 more times, took it to the shop was told it was a gas tank sensor ,$500. 00 stoud at the shop,and the car still has the problem,what happens if the engine reduces power while do 65 mpr down the free way, ? I think we have a big safty consern here, and gm needs to know, if they dont all ready know. . .
I was getting ready to pull out of my driveway and bring my child to preschool when I noticed there wasn't power when I stepped on the gas. Reduced engine power is what I read on my dashboard!!!! I returned to my garage because I was unable to drive him to school. I am very upset!! this looks as if it's an ongoing problem with GMC. I made an appointment to have my vehicle looked at, and I am waiting to find out more about this issue. I will be just as upset if there is a large out of pocket cost. This should be recalled, there are so many others with this same problem, I was just fortunate to be home.
2007 Yukon xl - traction control came on causing a reduction in power while traveling. This is a safety concern that should be addressed by general motors. This is a very serious safety issue that needs to be looked into, before somebody gets hurt or killed. Gm needs to recall their products that are involved.
Wife driving truck to work " reduced engine power", message came on the dash, and also said traction control was disabled. Power was reduced gradually to ten miles per hour. She floored the gas, nothing. Turned it off, restarted it, nothing. Engine light and traction disabled lighted were illuminated. Also the rear mirror temperature display flickers all the time. Drl burn out almost daily. Gmcs have major electrical issues before people start dying. Imagine a car shutting down on you while on the highway. That an accident waiting to happen. The rear wiper works when it feels like working, there is also a message about fixing the ride control. For all the bail money GMC got, they should recall these mistakes they made.
I was driving approximately 65 mph uphill when my engine and traction light came on. My speed was immediately reduced to about 35 mph even though I tried to accelerate. I drove home about 8 miles at a reduced speed because I had my children in the truck and it was raining. I took the truck to a mechanic the next day and he replaced the throttle body. I picked up the truck that evening and as I was driving home the same thing happened again. I took the truck back to the mechanic, the check engine light and tc light was on again however he said that there was nothing wrong. His thought was to replace the throttle body again. Two replacements later, the problem remains.
I have heard of several accidents because of reduced engine power. It slows the vehicle down and people behind them rearended them because it is a sudden drop in speed and there is no time to slam on the brakes please get this fixed before a child is injured or killed thank you.