2021 Chevrolet Suburban: Is It Reliable?
Problems, Recalls & Buyer Verdict
Shopping for a used 2021 Chevrolet Suburban? This page highlights owner-reported complaint patterns and recall history so you can inspect the right systems before buying. Current data includes 167 complaints, with Engine Problems as the top reported area.
2021 Chevrolet Suburban Fuel Economy
✓ EPA Official DataEPA-rated fuel economy across 8 2021 Chevrolet Suburban trim configurations. The median figure is shown; range reflects all available trims.
Source: EPA FuelEconomy.gov. Figures reflect EPA lab testing; real-world results vary by driving style, load, and conditions. 8 trims analysed.
2021 Chevrolet Suburban Safety Ratings
NHTSA 5-Star Program2 variants tested — showing 2021 Chevrolet Suburban SUV 4WDOfficial crash test results from the NHTSA 5-Star Safety Ratings program. Stars reflect government-conducted tests; higher is safer.
Overall
21.9% rollover risk
Frontal Crash
Side Crash
Rollover
21.9% probability
Source: NHTSA 5-Star Safety Ratings. Ratings are based on government crash tests and may not reflect all trim levels.
Based on NHTSA complaint data, the 2021 Chevrolet Suburban has 167 owner complaints, 6 crash-related complaints, and 12 recall campaigns on record. The most frequently reported component is Engine Problems. NHTSA reliability signal: Severe Issues.
- Make
- Chevrolet
- Model
- Suburban
- Model year
- 2021
- NHTSA owner complaints
- 167
- Crash-related complaints
- 6
- Safety recall campaigns
- 12
- Top reported component
- Engine Problems
- Reliability signal
- Severe Issues
- EPA MPG combined
- 17
- EPA MPG city / highway
- 15 / 19
- Fuel type
- Regular Gasoline
- NHTSA overall safety rating
- 4/5 stars
- NHTSA frontal crash rating
- 4/5 stars
- NHTSA side crash rating
- 5/5 stars
- NHTSA rollover rating
- 3/5 stars
- Electronic stability control
- Standard
Most Common 2021 Chevrolet Suburban Problems
Top owner-reported complaint areas and where they often appear.
Engine Problems
Transmission / Drivetrain
Fuel/Propulsion System
Complaint patterns center on Engine Problems, Transmission / Drivetrain, Fuel/Propulsion System. Use these as a pre-purchase inspection guide, then verify recall and damage history on the specific VIN.
Should You Buy a Used 2021 Chevrolet Suburban?
The 2021 Chevrolet Suburban shows higher complaint activity for its model-year profile, so buyers should inspect known problem areas carefully before purchase.
Use the model-year trend to shortlist candidates, then confirm the exact vehicle condition with service records, recall status, and a VIN history report.
What to Check Before Buying a Used 2021 Chevrolet Suburban
Inspection Focus
- Inspect the engine for any signs of problems or prior repairs.
- Verify all open recalls at nhtsa.gov/recalls.
- Request service records for transmission and fuel system repairs.
- Have a mechanic inspect the vehicle before purchase.
Before You Close the Deal
- Inspect the engine for any signs of problems or prior repairs.
- Verify all open recalls at nhtsa.gov/recalls.
- Request service records for transmission and fuel system repairs.
- Have a mechanic inspect the vehicle before purchase.
Shortlist with model-year data. Decide with the exact VIN.
Before buying a used 2021 Chevrolet Suburban, run a VIN history report to verify accidents, title brands, odometer records, theft checks, and open recalls for the exact vehicle.
What the Complaint Data Suggests
Editorial interpretation of NHTSA public complaint data. Source: nhtsa.gov. Complaints are owner-submitted and do not confirm a defect. Methodology
Based on 167 complaints for the 2021 Chevrolet Suburban, issues are concentrated in the engine, transmission, and fuel systems. A recurring theme appears to be engine problems, which account for the largest share of complaints. Buyers may want to inspect these areas closely.
- Engine problems represent the highest number of complaints among all components.
- Transmission/drivetrain issues are the second most reported concern.
- Fuel/propulsion system complaints are also notable, with 20 reports.
- Engine Problems
- Transmission / Drivetrain
- Fuel/Propulsion System
All 2021 Chevrolet Suburban Complaints by Category
Every owner-reported complaint category filed with NHTSA for the 2021 Chevrolet Suburban. Use this as a pre-purchase inspection checklist.
| Component | Complaints | Crashes | Fires | Avg Mileage | Volume |
|---|---|---|---|---|---|
| Engine Problems | 79 | 2 | — | — | |
| Transmission / Drivetrain | 29 | — | — | — | |
| Fuel/Propulsion System | 20 | — | 1 | — | |
| Electrical Faults | 17 | — | 1 | — | |
| Uncategorized Issues | 12 | 1 | — | — | |
| Forward Collision Avoidance: AEB | 11 | 2 | — | — | |
| Brake System | 9 | 1 | 1 | — | |
| Fuel System | 7 | — | — | — | |
| Gasoline | 7 | — | — | — | |
| Seat Belt Issues | 7 | — | — | — | |
| Airbag Malfunctions | 6 | 2 | — | — | |
| Headlight/Taillight Failures | 5 | — | — | — | |
| Wheel Issues | 4 | — | — | — | |
| Lane Departure | 3 | 1 | — | — | |
| Steering Defects | 3 | — | — | — | |
| Unintended Acceleration | 3 | 1 | — | — | |
| Seat-Related Issues | 3 | — | — | — | |
| Suspension Failures | 2 | 1 | — | — | |
| Structural Problems | 2 | 1 | — | — | |
| Visibility/Wiper | 2 | — | — | — | |
| Back Over Prevention | 1 | — | — | — | |
| Hydraulic | 1 | — | — | — | |
| Chest Clip | 1 | — | — | — | |
| Buckle | 1 | — | — | — | |
| Harness | 1 | — | — | — |
Source: NHTSA Complaints Database. Complaint counts may exceed total complaints because one report can span multiple categories.
Real Owner Complaints
Read what owners actually reported to NHTSA for the 2021 Chevrolet Suburban. Type a keyword (e.g. “transmission”, “stalling”, “brakes”) to filter.
The transmission of the 2021 Suburban failed. While operating the vehicle down a state highway, out of nowhere the power was reduced significantly while in traffic. It would not go over 30 MPH after forcing itself to 30 MPH while driving down the busy highway. After struggling to…
The contact owns a 2021 Chevrolet Suburban. The contact stated that while driving at an undisclosed speed, the vehicle jerked abnormally while shifting into reverse(R) or drive(D). The contact stated that the vehicle lost motive power with the check engine warning light illuminat…
My 2021 Chevrolet Suburban experienced a sudden no start condition which required the vehicle to be towed for repair. A diagnostic inspection determined that both the fuel pump and the fuel pump control module had failed. I paid out of pocket for the full repair, including replac…
Lane departure assist, adaptive cruise control, auto emergency braking, adaptive high beam, forward collision warning system became unresponsive while driving on highway during trip. Had to take vehicle into GM dealership for ADAS camera replacement.
Had an engine replacement in dec of 2025 and had to pay for it since wasn’t under warranty or recall. And now my replacement engine which has a warranty now. Just failed in March 2026 which about 3 months later. Had metal shavings in engine and multiple cylinders misfiring. And n…
The contact owns a 2021 Chevrolet Suburban. The contact stated that while driving at various speeds, the steering wheel was difficult to turn to the left or the right. The contact stated that the failure was intermittent, but was a recurring failure. There was no warning light il…
My 2021 Chevrolet Suburban experienced a sudden and complete engine failure at approximately 79,000 miles. The vehicle became inoperable and is currently at a dealership pending evaluation. There were no prior warnings indicating an imminent catastrophic failure. A sudden engine…
I am submitting this complaint to report a serious safety issue involving my 2021 Chevrolet Suburban equipped with the 3.0L Duramax diesel engine. The vehicle has experienced a recurring problem related to the engine wiring harness. While driving, the vehicle will unexpectedly s…
On Friday, March 13, 2026, while traveling at approximately 60 mph on the highway, my 2021 Chevrolet Suburban equipped with an L87 6.2L V8 engine experienced a sudden and complete loss of motive power. The failure sequence began with a dashboard warning prompting me to "press the…
See attached document for complaint.
While driving the Engine warning light, service ESC light, and collision light all came on and an engine knock started. I also experienced a loss of power at the same time. Car was taken to local Chevy dealership for evaluation and repair. Dealership advised that they dropped the…
The contact owns a 2021 Chevrolet Suburban. The contact stated that while driving 35 MPH on the highway, the vehicle stalled. The contact pulled over to the side of the road. There was no warning light illuminated. The vehicle was towed to an independent mechanic, where it was di…
Rear Axle is grinding. Took vehicle into dealer and it is the well documented rear axle issue but this vehicle is not included in a recall. The differential fluid was replaced and figure 8s were done but there is still grinding. The rear axle also drags at times when in auto 4…
In April of 2022 with 26k miles my vehicle had its first engine failure, Chevrolet dealership had to replace engine lifters due to a known engineering defect with the 2021 6.2 L87 engine. Now in late February 2026 with 80k miles my engine has locked up and requires a brand new en…
While driving, the engine malfunctioned. There were no warning lamps, messages, or other symptoms prior to the malfunction. The vehicle has been inspected and repaired by a Chevrolet dealership.
The check engine and traction control light came on in my car. This was accompanied by a clanking sound, shaking. The panel said “ SERVICE ESC” “ service traction control” and “ forward collision system unavailable” The Chevrolet light logo on the back of my car will also not t…
My [XXX] Daughter lost the ability to put the vehicle in reverse while running errands on a Saturday. We had to push the truck out of the parking spot "backwards" in neutral in order to get the vehicle in a position to put it in "drive". She had been going in and out of shoppi…
The contact owns a 2021 Chevrolet Suburban. The contact stated that while driving 45 MPH, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended, and the vehicle decelerated unintendedly. Additionally, the vehicle failed to exceed 42 MPH. Later…
Engine failure at 86,000 miles with documented regular oil change and recommended services
My vehicle was taken in to shop due to recall recommendation I received in GM app for fuel pump control module . After repair was done my engine begin ticking the same day and failed a week later . I documented the whole thing and filed a claim with GM however the dealership tha…
Source: NHTSA Complaints Database. Real owner reports for the 2021 Chevrolet Suburban.
2021 Chevrolet Suburban Recalls
12 campaignsNHTSA recall campaigns for the 2021 Chevrolet Suburban. 12 recall campaigns are on record for this model year. Recalls are free to fix at authorized dealers, but completion status must be verified on the exact VIN.
2021 Chevrolet Suburban Buying FAQ
Buyer-focused answers based on real NHTSA complaint and recall data for this model year.
Is the 2021 Chevrolet Suburban reliable?▾
Severe Issues. NHTSA currently shows 167 owner complaints, 6 crash-related complaints, and 12 recall campaigns for this model year. The 2021 Chevrolet Suburban shows higher complaint activity for its model-year profile, so buyers should inspect known problem areas carefully before purchase. Treat this as a model-year signal, then verify the exact vehicle's condition and history before purchase.
What are the most common problems with the 2021 Chevrolet Suburban?▾
#1: Engine Problems (79 complaints). #2: Transmission / Drivetrain (29 complaints). #3: Fuel/Propulsion System (20 complaints)
At what mileage do problems start on the 2021 Chevrolet Suburban?▾
Mileage data is not available or insufficient for this model year.
How safe is the 2021 Chevrolet Suburban?▾
Complaint data is not the same as crash-test scoring, but it does highlight possible risk patterns. For the 2021 Chevrolet Suburban, NHTSA complaints include 6 crash-related reports and 1 fire reports out of 167 total complaints. 5 injury reports are also on file. For controlled crash-test ratings, check nhtsa.gov/ratings.
Does the 2021 Chevrolet Suburban have any recalls?▾
Yes. 12 NHTSA recall campaigns affect the 2021 Chevrolet Suburban. A major recall area is STEERING:STEERING CONTROL MODULE. 12 recall campaigns are on record for this model year. Always verify open recalls by VIN because completion status varies by vehicle.
Should I buy a 2021 Chevrolet Suburban?▾
The 2021 Chevrolet Suburban shows higher complaint activity for its model-year profile, so buyers should inspect known problem areas carefully before purchase. Use the model-year trend to shortlist candidates, then confirm the exact vehicle condition with service records, recall status, and a VIN history report. Pay extra attention to Engine Problems during inspection. Before committing, run a VIN history report to verify accidents, title brands, odometer records, and recall completion for the exact car.
Source: NHTSA (National Highway Traffic Safety Administration) complaint and recall databases, aggregated by VinSpector AI.
Wider context: See the full Chevrolet Suburban reliability report with year-by-year comparison.
Owner Reliability Rating
Rate the 2021 Chevrolet Suburban based on your ownership experience.
Add your rating:
Ratings are based on owner experience and are separate from NHTSA data shown above.
Check the Exact Vehicle History Before You Buy
Model-year complaints and recalls reveal patterns. A VIN report confirms whether the exact car has accident history, title brands, mileage issues, or open recalls.