Vehicle Data Hub

2021 Chevrolet Suburban problems

NHTSA has received 268 complaints about the 2021 Chevrolet Suburban, and 37% of them involve engine. Next are drivetrain & axles (14%) and fuel system (12%).

At a glance

Complaints
268 filed with NHTSA
Most reported
Engine 37% of complaints
Crashes and fires
12 and 3
Injuries and deaths
13 and 0
Typical mileage
69,000 miles 46 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%.

When problems show up

Complaints by mileage, 2021 Chevrolet Suburban Complaints by odometer reading in 20,000-mile steps. The median is about 69,000 miles. 0k to 20k miles: 7 complaints 20k to 40k miles: 10 complaints 40k to 60k miles: 2 complaints 60k to 80k miles: 7 complaints 80k to 100k miles: 10 complaints 100k to 120k miles: 6 complaints 120k to 140k miles: 2 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: 69,000 miles
Based on 46 complaints that include mileage. 41% 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 miles7
20k to 40k miles10
40k to 60k miles2
60k to 80k miles7
80k to 100k miles10
100k to 120k miles6
120k to 140k miles2
140k to 160k miles1
160k to 180k miles1
180k to 200k miles0
200k+ miles0

What the data shows

Of the 46 complaints that include odometer readings, half describe a problem before roughly 69,000 miles. For engine specifically, the median reported mileage is about 104,000 miles (19 complaints with mileage).

Safety-related details: 12 complaints mention a crash; 3 complaints mention a fire; 13 injuries reported.

Looking only at complaints filed within five years of the model year (so older and newer years are comparable), the 2021 ranks 10th most-complained-about out of 35 model years of the Chevrolet Suburban with enough data (268 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.

I was involved in a 40 MPH frontal impact collision with another vehicle. The initial impact occurred on the driver side front corner of the vehicle. During the initial collision me head swung sideway striking the b post window area and knocked me unconscious for a short time. I then t-boned a truck and finally came to rest against another vehicle. At no time did my airbags (front or side) deploy. Nor has my vehicle even registered that I was involved in a collision.

Reported at 9,500 miles, May 2021 CrashInjury

We were stopped at a red light on florida state road 54 turn lane to go on us 75 when the other car rear ended us and drove us into the car in front of us. No air bags deployed. Florida highway patrol crash number 88482185. We only had the vehicle for 10 days.

Reported at 361 miles, March 2021 Crash

The contact owns a 2021 Chevrolet Suburban. The contact stated that while operating the vehicle, the infotainment center malfunctioned and displayed a black screen. The contact stated that the backup camera was inoperable. The contact stated that due to the failure, the vehicle was unable to receive over-the-air updates from the manufacturer that were safety-related. The cause of the failure was not yet determined. The local dealer and manufacturer were notified of the failure, but no assistance was provided.

Reported at 88,000 miles, February 2025

The contact owns a 2021 Chevrolet Suburban. The contact stated that while driving 20 MPH, the radio display screen was blank. Additionally, the vehicle turned on and off independently, the doors locked and unlocked independently, and the liftgate closed independently. The contact stated that the power running board failed to operate as needed and failed to activate on the front driver’s and passenger’s sides of the vehicle. The failure had occurred on several occasions. A dealer was contacted.

Reported at 68,448 miles, November 2025

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