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7.7

pretty bad
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
6,071 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.

2021 GMC Yukon engine problems

engine problem

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2021 GMC Yukon Owner Comments

problem #19

May 262024

Yukon

  • miles

A D V E R T I S E M E N T S

Twice in a five day span vehicle stalled out, acting like it is not getting fuel. Each time it took several minutes of trying to restart and getting below fuel tank to give it a couple knocks to get it to start. Both times there was atleast a half tank of gas. Each time the car was running well when it suddenly slowed down on its own, the first time I was on a busy street resulting in the need for a tow and I had my grand baby with me. The second time it was an isolated road and surprisingly I had cell service to call for assistance. The tow truck driver told me he thought it was the fuel pump. I looked up my vin but it isn-??t listed as one of the affected vehicles in the GMC Yukon recall, however it certainly seems like it is. I had no warning of any type with each incident, the car simply acted as if it ran out of gas. I have an appointment with a local garage. Additionally when this happens the vehicle does not let me shut it off. The engine isn-??t running but I can-??t power down the electronics system.

- Lockwood, NY, USA

problem #18

Mar 292024

Yukon

  • miles
Total engine failure due to bearing issues in the bottom half of the engine.

- Valpraiso, NE, USA

problem #17

Jan 312024

Yukon

  • miles
FUEL PUMP POWER CONTROL MODULE SKU NUMBER 13537053 brand new GMC denali less than 9000 miles had serviced for 5 previous recalls drove for a week. Truck completely shut down on road no power will cause serious or death if person is on highway as engine turns off and car shuts down due to electric shift cant put car in neutral not even with key from key fob so if get vehicle towed cant even shift into neutral big fail on gm part and will cause major issues as vehicle just shuts off do to this issue no service light. Major accident waiting to habit and back ordered parts on a expensive machine

- Lake Stevens, WA, USA

problem #16

Jan 012024

Yukon

  • miles

A D V E R T I S E M E N T S

My family and I purchased this vehicle brand new in August 2021. We live in Phoenix Arizona and bought it from Earnhardt Buick & GMA in Mesa, AZ. While driving the vehicle in the last few weeks I personally could smell a strong odor of fumes in the cabin when the A/C or Heater were on. After a few days of noticing it my nose got numb to the odor as I dismissed it and kept driving the vehicle. After about a week, I had my two kids in the vehicle, they both noticed and made comments on how strong the odor of fumes were. We decided to not utilize the A/C or the Heater and contacted the dealer for investigation and repairs. This is a very serious health hazard as I and my family were exposed to exhaust fumes entering the cabin. For a few days and nights I suffered headaches and some dizziness as I was driving mostly the vehicle. We did take it to Earnhardt Buick & GMA in Mesa, AZ for investigation and repair. The maintenance supervisor confirmed that indeed somehow the exhaust had some crack that allowed fumes to enter the ventilation system. The Vehicle is now under repair at the dealership. I was notified by the maintenance advisor that this defect would not be cover under warranty as the vehicle is out of manufacture warranty. I Also had purchased an extended warranty (Platinum) which they had stated "bumper to bumper", but this also does not cover the manufactures defect. There were no warning lights associated with this problem. I would strongly recommend that inspections be made, especially if some drivers have problem with smell and odors. This is a big health hazard. Thank you for your attention. [XXX]. [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Chandler, AZ, USA

problem #15

Jan 032024

Yukon

  • 67,150 miles
The contact owns a 2021 GMC Yukon. The contact stated while driving 25 MPH, upon accelerating from a light, the vehicle began to shake and decelerated and failed to accelerate and exceed 25 MPH. The vehicle accelerated, jerked, and stalled. The check engine warning light was illuminated. The vehicle was taken to the local dealer, where it was diagnosed that the fuel pump control module needed to be replaced. The mechanic informed the contact that the parts were on backorder. The vehicle was not repaired. The contact stated that the failure was related to NHTSA Campaign Number: 21V739000 (Fuel System, Gasoline). The manufacturer was notified of the failure and opened a case. The failure mileage was approximately 67,150.

- Elkton, MD, USA

problem #14

Nov 202023

Yukon

  • miles
On Monday, November 20, 2023, I was operating my vehicle on Interstate 80 in western Nebraska when suddenly and without any notice, apparently an engine lifter in cylinder 8 failed causing the vehicle to lose power while in heavy semi-truck traffic, while operating at approximately 80 mph, forcing me to avoid a collision. Since the incident, I have become aware that this is a known problem with GMC, and that they have extended their power train warranty under certain circumstances because so many engine lifters are failing, many without notice or warning. My vehicle is serviced every 6,000 miles at a GM dealer and also operates the OnStar system. Neither the dealer nor OnStar detected the failure or warned me of any issues that cause a stall while in traffic. Fortunately, I am an experienced driver and was able to safely pull the vehicle off the highway.

- West Bend, WI, USA

problem #13

Nov 212023

Yukon

  • miles

A D V E R T I S E M E N T S

While traveling on the interstate at 70 mph with husband and child inside, the vehicle started shaking and stalled. Had to glide off onto an exit ramp where the vehicle stopped and would not restart. Onstar ran diagnostics and came back with code P129F.

- Largo, FL, USA

problem #12

Aug 232023

Yukon

  • miles
This GMC Yukon underwent an over the air update in remote Wyoming and was almost undriveable due to steering problems and brake malfunction. Also engine and transmission problems. It has been awaiting repair, but I have been informed that no fix is available because of transmission defect. No parts available We were nearly stranded.

- Missoula, MT, USA

problem #11

Dec 092021

Yukon

  • miles
My transmission had to be replaced back in December of 2021, and now I have taken my truck back to the dealership for transmission problems again, the transmission is slipping again, driving rough and now im getting a safety restraints message and the airbag picture is coming

- Corona, CA, USA

problem #10

Mar 202023

Yukon

  • 17,000 miles
The contact owns a 2021 GMC Yukon. The contact stated while stopped at a traffic signal, the engine started revving without the accelerator pedal being depressed. The contact stated that the vehicle occasionally independently accelerated. The contact state that the failure also occurred while the vehicle was in park(P). The contact stated no warning light was illuminated. The contact had not taken the vehicle to a local dealer or independent mechanic. The vehicle had not been diagnosed or repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 17,000.

- Timmonsville, SC, USA

problem #9

Oct 182022

Yukon 8-cyl

  • 24,000 miles

A D V E R T I S E M E N T S

The contact owns a 2021 GMC Yukon. The contact stated that while driving approximately 30 MPH and accelerating to approximately 40 MPH, another vehicle suddenly pulled in front causing the contact to apply the brakes. While attempting to apply the brakes, the brake pedal went to the floor. The traction control, ABS, ECF, and check engine warning lights were illuminated. The contact then pulled over to the side of the road where the vehicle eventually coasted to a stop. The contact drove the vehicle slowly to the residence. The contact had the vehicle towed to the dealer who diagnosed that the brake master cylinder and ECF needed to be replaced. The vehicle had not been repaired. The manufacturer was made aware of the failure and opened a case. The approximate failure mileage was 24,000.

- Washington, MI, USA

problem #8

Jul 162022

Yukon

  • miles
Total Engine Failure. Cause UNKNOWN, Driving on highway from family vacation. For 1-2 miles prior to incident car begins running rough, High RPMs, Engine pressure rising. Receive a warning on dash. 'Engine shutting down. No prior warnings or issues in the vehicle life. Pull over' Engine will not restart. Have to call two tow drivers, neither are able to get engine into neutral to tow. Second tow driver uses makeshift skids to pull car onto tow truck. Is towed to nearest GMC dealer. At next business day the car is inspected and prognosis is total engine failure. This was a 2021 just over a year old with 22,000 miles. Vehicle shut down every person in vehicle could have been injured if we had been unable to pull over to a safe location, were driving 70mph on highway.

- Dallas, TX, USA

problem #7

Aug 012022

Yukon

  • miles
On a road trip out of state we stopped for gas. We got back on the road and few miles out the car suddenly slowed and gave a message on the screen something about acceleration. We pulled over and next the reverse didn-??t work. We stayed overnight then next day the reverse still did not work. We were able to place in drive and continue on but we don-??t have fully functioning reverse mode.

- Tokio, ND, USA

problem #6

Apr 292022

Yukon

  • 5,400 miles
The contact owns a 2021 GMC Yukon. The contact stated that while the vehicle was idling in a drive-thru, the vehicle lost motive power and stalled. The contact stated that no warning lights were illuminated. The contact stated that he was able to restart the vehicle and drove the vehicle with no issues however, the next day the failure recurred. The vehicle was towed to the dealer where the failure was diagnosed as a power control module malfunction. The contact stated that the power control module was replaced under warranty. The contact stated that failure recurred several weeks later. The vehicle was towed back to the dealer where the failure was unable to be replicated. The vehicle was test-driven at the dealer for about 50 miles and no repairs were completed. The contact stated that the failure recurred for the third time and was awaiting a tow to the dealer. The contact related the failure to NHTSA Campaign Number: 21V739000 (Fuel System, Gasoline) however, the contact was unsure if the vehicle was included or had been previously repaired under the recall. The manufacturer was notified of the failure and a case was opened. The contact stated that he was awaiting a call back from the manufacturer. The approximate failure mileage was 5,400.

- Oak Lawn, IL, USA

problem #5

Apr 232022

Yukon

  • miles
We have a 2021 Yukon Denali. It has just over 12,000 miles on it. My wife called me In a frenzy today saying the motor was making a poping noise and it was pulling her on the interstate. She was very concered, but managed to make it home From Her 15 mile exit. When she got home, it was evident that the lifters are to blame For This incident. GMC needs to recall all these 2021 GMC Yukons with all these lifter problems. Very unsafe. We plan on getting rid of the vehicle.

- Lacassine, LA, USA

problem #4

Mar 102022

Yukon

  • miles
My blind spot warning light and signal doesnt work all the time. for example, if a pass a car, or a car passes me at a speed of more than 5 miles per hour, there is no notification from the blind spot warning light in the mirror, or an audalble signale either. i have taken the car to the GMC dealership 3 times and i was told that is normal, and nothing is wrong. I own other GMC models and i have never experianced this intermitant issue.

- Mentor, OH, USA

problem #3

Sep 242021

Yukon

  • miles
Engine failed on my new vehicle. GM is aware of faulty lifters produced over roughly a 3 month period. My vehicle has been confirmed to have those faulty batch lifters. At this time GM is only replacing lifters on the side of the engine that failed. The local dealership is having 2-3 of these come into the service shop per day. This is a major problem and I am being told it could be 2 months before I get my vehicle back. When I get the vehicle back I want it fixed properly and safe to drive. I don't want my family broken down on the side of the road due to GM knowingly not replacing a faulty product let alone the inconvenience of not having the vehicle again for repairs.

- Henrico, VA, USA

problem #2

Sep 082021

Yukon

  • miles
GMC Yukon Denali SUV 2021, push rods and lifters in motor are bad, this could have cause an accident due to SUV stopping in traffic or on the highway. Please help with this safety issue. The GMC Denali SUV 2021 only has 7000 miles on it, it new. I thank you in advance for you support. Regards George L Patterson

- Opp, AL, USA

problem #1

Nov 042020

Yukon

  • 1,800 miles
We were coming back from a trip with my children and this vehicle was barely 2 weeks old with 0 miles and we were on a highway when all the emergency lights on the dash went off. It was flagging the electrical system, the engine, the brakes. Honestly all the lights possible went off. The vehicle was lagging and it felt force when we pushed on the gas. Our hands were gripping the steering wheel to keep it in lane till we could get off.

- Aurora, CO, USA

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