really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
2 / 0
Average Mileage:
47,945 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2008 GMC Yukon engine problems

engine problem

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2008 GMC Yukon Owner Comments

problem #4

Jun 102015


  • 100,000 miles


The contact owns a 2008 GMC Yukon. While driving at approximately 25 mph and approaching a stop sign, the brake pedal was depressed but the vehicle did not stop. The accelerator 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 repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 100,000.

- Denver, PA, USA

problem #3

Mar 142012

Yukon 8-cyl

  • 64,000 miles
When traveling on a very busy interstate, I backed off the gas and went to accelerate when my vehicle went to reduced engine power. Thankfully, the car made it to the next exit which had a GM dealer. They replaced the acceleration pedal position sensor. The car was purchased new in March 2008. This issue happened the first time in March 2012. 2 years later in March 2014, this issue happened again. The same part was replaced. We contacted Chevrolet and filed a formal complaint. We were told they would probably not do anything, it's scary that a gas pedal has been replaced I a vehicle twice in 6 years.

- Huntersville, NC, USA

problem #2

Sep 222008

Yukon 8-cyl

  • 500 miles
This is in regards to GMC bulletin #pip4112J : sag or hesitation on acceleration (normal operation characteristics) - (Jul 21, 2011). I've been having this problem since day one and took the SUV to many dealers but dealers could not verify the concern until now. The 2008 GMC Yukon XL denali would stop accelerating for 2-3 seconds when the gas pedal is pressed. Most of the time it is when I am trying to pass a lane, trying to enter highway, trying to climb a mild hill or trying to avoid a potential accident. After the delay, the transmission would down shift and I think it down shifts to either 1st or 2nd gear causing the SUV to roar like crazy and shoots out like a cannon. I had an incident where the cops gave me a warning with the lights and siren probably thinking that I was driving recklessly. There were also incidents where I've had the gas pedal pressed down about 80%-90% trying to climb a mild elevation and either the engine and or transmission started to choke. It was so bad that the denali almost came to a full stop. You really have to experience this on your own to understand how scary and nerve wrecking it is when you have vehicles about to Ram you from behind because the SUV simply would not accelerate. Many times, I had to swerve back in to original lane in fear of causing a serious accident. Because of this, I don't even let my wife drive the vehicle. Service manager was kind enough to research on this matter and found bulletin #pip4112J and he can't really do anything. I've been explained that due to large power from the engine, he has seen the rear of the vehicles break apart. I fully understand the service manger's position on this but I think this is a major safety concern and someone can seriously get hurt by this.

- Sunnyside, NY, USA

problem #1

Mar 232009


  • 27,279 miles
Reduced engine power intermittently and without warning vehicle will not go above 35 mph. Has occurred five times with a different "fix" each time. One of the times it occurred my teenage son was driving on the interstate and had to pull over. Another time it happened my daughter was driving the vehicle and fishtailed taking a corner and had continued deceleration going up the bridge. Major safety issue!

- Indialantic, FL, USA

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