Driving the vehicle on the highway when I started to hear a ticking sound from the engine. After a few minutes, the check engine light came on and started flashing, traction control shut off and some system related to the rear end shut off. After inspection, it appears to have dropped a lifter.
2021 gmc Yukon engine problems
moderate 124 complaints filed with NHTSA · avg repair $3,100
Complaints
124
Recalls
0
Crashes
0
Avg fix
$3,100
What owners are reporting 8 most recent
Freedom, tire and automotive Inc. advised my 6.2LV8 engine has failed due to metal debris found in the new oil, indicating a mechanical failure of an internal engine component. I called GMC and they referred me to you.
Engine failure
While accelerating the vehicle began to make an audible liquid grinding sound and three error codes popped up, one after another. The engine light began to flash, however the vehicle kept moving. I limped roughly .5 mile to the closest service station where I subsequently had my vehicle towed to the dealership where it was purchased. Later notified the lifter and CAM failed. Mind you, this vehicle…
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 G…
I got 3 messages on the dash going off simultaneously 1. Service Traction Control System 2. Forward Collision System unavailable 3. Service ESC I could feel the truck bogging and shaking a little at this point Then soon after the check engine light was flashing and it was noticeably misfiring and rough idling. I pulled some codes at Oreillys and got back 1. P0300 misfire 2. P050D cold start r…
I was driving 55 mph and the engine failed without any prior warning. I was partially blocking traffic while waiting for a tow truck. The car was taken to a repair facility and diagnosed. Spun rod bearings on cylinders 1 and 2 damaged the crankshaft. I purchased this car $49,000 45 days ago and have made one payment on a car that is not drivable and parts are not readily available. There is a GM …
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.
Common questions
How serious is the engine problem on the 2021 gmc Yukon?
It's a documented issue but not catastrophic. 124 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Other problem areas on this vehicle
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Severity ratings are derived from reported crashes, fires, injuries, and fatalities.
Repair cost estimates are independent-shop national averages and may differ in your area.
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