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Transmission and drivetrainPart report

2021 GMC Yukon XL Transmission and drivetrain Problems

Complaints
49about this part
Share
21%of 230 total for the year
Median mileage
66,000miles
Trend
RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.

NHTSA recorded 49 complaints about the transmission and drivetrain of the 2021 GMC Yukon XL, 21% of the 230 complaints for this model year. Where a mileage was given, the median is 66,000 miles. 2 recall campaigns on record are filed under a similar system.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“While I was driving home from the grocery store with my 4 kids our 2021 GMC Yukon XL (5.3L V8 engine), the vehicle suffered a sudden, catastrophic mechanical engine failure without warning. The engine began violently shaking, lost major propulsion, and dropped into a severe misfire state when we were coming down the highway. …”

NHTSA complaint #11742514, filed 2026-06

“My family and were traveling to visit family, and the transmission stalled on me on the interstate. I almost had a horrible accident with my kids in the vehicle. The vehicle is in the shop currently and dx with transmission issues. GMC needs to recall and or fix the transmissions in all of their vehicle.”

NHTSA complaint #11748113, filed 2026-07

“I have 60k miles on my 2021 yukon xl denali. the transmission went out in it in January. i have it in the shop in january for a new transmission. i got it back and the transmssion went out again in it. its currently in the shop. the transmission is a 10 speed and has been nothing but issues.”

NHTSA complaint #11729617, filed 2026-04

“In March 2025, a situation happened to me during a six hour round trip drive. I experienced a loss of acceleration. Vehicle engine felt it was stumbling when accelerating or seemed like I had ran something over. I don't remember seeing any lights coming on. Pulled over immediately, turned off the vehicle. Turned it back on and drove back home three hours worried it may happen again. I didnt see any warning lights on the trip.”

NHTSA complaint #11662492, filed 2025-05

“My 2021 GMC Yukon XL Denali is part of the April 2025 recall for the 6.2L V8 engine defect. The dealership confirmed the engine must be replaced, but the part is on backorder, potentially for several months. In the meantime, GMC only authorized a GMC Acadia as a courtesy vehicle. The Acadia is not comparable to our Yukon XL. We are a family of six, and while the Acadia has a third row, there is almost no cargo space with it in use. …”

NHTSA complaint #11684664, filed 2025-09

Related recalls

Related service bulletins

Transmission and drivetrain: other model years

YearComplaintsShare of year
202625%
202527%
20241216%
20233917%
20223319%
20214921%
20201328%
20191522%
2018916%
20173624%
20163316%
20153511%
201218%
201149%
200914%
200823%
200755%
200616%
200537%
200445%
200333%
200299%
200143%
200023%

Other parts of the 2021 GMC Yukon XL

Engine
141 complaints
Fuel system
34 complaints
Engine cooling
21 complaints
Electrical system
14 complaints
Other or unknown
8 complaints
Forward collision avoidance
7 complaints
Vehicle speed control
7 complaints
Brakes
6 complaints
Suspension
6 complaints
Visibility (wipers, defrost, mirrors)
6 complaints
Air bags
4 complaints
Steering
4 complaints

← All problems reported for the 2021 GMC Yukon XL

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology