Vehicle Data Hub

2021 GMC Yukon XL problems

The 2021 GMC Yukon XL has 317 complaints on file with NHTSA. The largest share (51%) concerns engine. After that come drivetrain & axles (15%) and fuel system (10%).

At a glance

Complaints
317 filed with NHTSA
Most reported
Engine 51% of complaints
Crashes and fires
2 and 2
Injuries and deaths
5 and 0
Typical mileage
64,000 miles 60 complaints with mileage

Source: NHTSA owner complaints

Where the complaints are

Share of this model year's complaints by the part of the car involved. One complaint can name more than one part, so the shares can add up to more than 100%.

  • Engine 51%
  • Drivetrain & axles 15%
  • Fuel system 10%
  • Electrical system 4%
  • Forward collision avoidance 3%
  • Cruise control 2%
  • Wipers, windshield & visibility 2%
  • Brakes 2%
  • Suspension 2%
  • Air bags 1%

When problems show up

Complaints by mileage, 2021 GMC Yukon XL Complaints by odometer reading in 20,000-mile steps. The median is about 64,000 miles. 0k to 20k miles: 10 complaints 20k to 40k miles: 8 complaints 40k to 60k miles: 8 complaints 60k to 80k miles: 19 complaints 80k to 100k miles: 5 complaints 100k to 120k miles: 5 complaints 120k to 140k miles: 3 complaints 140k to 160k miles: 1 complaints 160k to 180k miles: 1 complaints 180k to 200k miles: 0 complaints 200k+ miles: 0 complaints 040k80k120k160k200k miles Typical: 64,000 miles
Based on 60 complaints that include mileage. 43% were reported before 60,000 miles. The amber marker shows the median: half of these complaints happened before that mileage.
View the numbers
MileageComplaints
0k to 20k miles10
20k to 40k miles8
40k to 60k miles8
60k to 80k miles19
80k to 100k miles5
100k to 120k miles5
120k to 140k miles3
140k to 160k miles1
160k to 180k miles1
180k to 200k miles0
200k+ miles0

What the data shows

Among the 60 complaints that report mileage, the typical (median) problem appeared at about 64,000 miles. For engine specifically, the median reported mileage is about 73,000 miles (31 complaints with mileage).

Safety-related details: 2 complaints mention a crash; 2 complaints mention a fire; 5 injuries reported. Its complaints are less severe on average than those of 92% of model years in our database.

Looking only at complaints filed within five years of the model year (so older and newer years are comparable), the 2021 ranks 2nd most-complained-about out of 24 model years of the GMC Yukon XL with enough data (317 complaints in that window). It is also covered by 12 safety recall campaigns.

What owners wrote

A few complaints as filed, shortened and with personal details removed. The first ones are among the most serious reports for this model year; the rest are typical.

Make left turn and distracted by kids in the back. Looked back and felt a crash. Collided with a traffic signal pole and caused major/total damage to vehicle. Driver side airbag DID NOT deploy causing injury to neck, shoulder, and lower back.

July 2021 CrashInjury

Large fire started at rear of car. Car was parked on driveway and no one was inside. Noticed a burning smell before fire started. Could not locate any smoke. Vehicle rear burst into flames 20 minutes later. Fire department responded quickly and was able to put out the fire before it reached the house. Vehicle is totaled. Vehicle was inspected by fire department and police after fire was extinguished. They believe the fire was electrical. Vehicle is currently being inspected by insurance company.

March 2023 Fire

The contact owns a 2021 GMC Yukon XL Denali. The contact stated that while driving at 70 MPH, the transmission unexpectedly downshifted into neutral (N). The vehicle was taken to the dealer, where a test drive was performed and the failure recurred. The vehicle was towed back to the dealer, where it was diagnosed with internal engine failure and determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure.

Reported at 35,204 miles, January 2023

The contact owns a 2021 GMC Yukon XL. The contact stated that when the vehicle was started, there was a loud sound coming from the engine compartment. The contact stated that when the vehicle was driven around the block, the sound was still present coming from the engine compartment. The vehicle was taken to an independent mechanic where an oil change was performed but the failure persisted. The vehicle was then taken to the residence.

Reported at 100,371 miles, May 2025

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