2021 Chevrolet Suburban: Problems & Reliability
AVOID2021 Chevrolet Suburban: AVOID — 207 owner complaints, 1.7× the Suburban median year by raw count; top issue: engine (92 complaints).
CarWhere's verdict score for the 2021 is 3.99, where 1.00 is a typical Suburban year once complaints are weighted for severity and spread over time on the road; the avoid line is 1.60, so this year clears it by 2.39. Severity drives it: 80% of those complaints report a crash, fire or injury or involve a safety-critical system (engine, powertrain, steering, brakes or fuel).
Sources: NHTSA owner complaints (ODI), recall campaigns and manufacturer service bulletins, CarWhere verified buyer prices · Model years 2013–2024 compared · Updated 2026-11-07 · By CarWhere Research · Methodology
207
NHTSA complaints
1.7×
vs. median Suburban year
1,360
Service bulletins
12
Recall campaigns
Most-reported 2021 Chevrolet Suburban problems
Engine is the clear leader, named in 44% of complaints.
| Component | Complaints | Share of 2021 complaints |
|---|---|---|
| Engine | 92 | 44% |
| Powertrain / transmission | 40 | 19% |
| Fuel / propulsion system | 22 | 11% |
| Electrical system | 20 | 10% |
| Unknown or other | 14 | 7% |
A complaint can name more than one component, so shares can add up to more than 100%.
2021 Chevrolet Suburban recalls
12 recall campaigns on federal record for the 2021, reported between Nov 25, 2020 and Apr 24, 2025.
| NHTSA campaign | Reported | Component |
|---|---|---|
| 25V274000 | Apr 24, 2025 | Engine & cooling › Engine › Hard parts internal/mechanical |
| 24V797000 | Oct 24, 2024 | Powertrain / transmission › Automatic transmission › Control module › Software |
| 22V827000 | Nov 3, 2022 | Exterior lighting › Lighting control module › Software |
| 22V617000 | Aug 11, 2022 | Seat belts › Critical fasteners |
| 22V036000 | Jan 27, 2022 | Powertrain / transmission › Driveline › Driveshaft |
| 21V739000 | Sep 23, 2021 | Fuel system, gasoline › Delivery › Fuel pump › Control/drive module |
| 21V455000 | Jun 17, 2021 | Steering › Steering control module |
| 21V421000 | Jun 10, 2021 | Air bags › Srs malfunction warning lamp/light |
| 21V190000 | Mar 18, 2021 | Seat belts |
| 20V811000 | Dec 23, 2020 | Seat belts |
| 20V792000 | Dec 17, 2020 | Seat belts |
| 20V735000 | Nov 25, 2020 | Seats |
2021 Chevrolet Suburban service bulletins
The manufacturer has filed 1,360 technical service bulletins with NHTSA for the 2021 — close to the 1,306 of the median Suburban year from 2013 to 2024. Coded bulletins most often cover electrical system (370), engine & cooling (275), powertrain / transmission (182). Bulletins are repair instructions for dealer technicians, not recalls.
The 2021 vs. the year before and after
From the 2020 to the 2021, owner complaints jumped 5.2× (40 → 207) — a step backward. The 2022 that followed fell 39% (207 → 127), so the 2022 has the lighter record so far.
| Model year | Verdict | Complaints | Bulletins | Recalls | Avg. buyer-paid |
|---|---|---|---|---|---|
| 2020 Suburban | SOLID | 40 | 840 | 4 | — |
| 2021 (this page) | AVOID | 207 | 1,360 | 12 | — |
| 2022 Suburban | AVOID | 127 | 1,163 | 4 | — |
Prices are averages of CarWhere verified buyer transactions (shown when 3+ deals exist for the year). Full year-by-year table: Chevrolet Suburban years to avoid.
What to check on a used 2021 Chevrolet Suburban
Engine (92 complaints on the 2021): cold-start it yourself and listen for ticking or knocking; check for oil leaks, low coolant and a lit check-engine light, and ask for oil-change records.
Powertrain / transmission (40 complaints on the 2021): test-drive from cold through every gear and feel for slipping, harsh or delayed shifts and shudder; ask whether the transmission fluid has been serviced.
Fuel / propulsion system (22 complaints on the 2021): smell for fuel around the car, watch for hesitation or stalling, and check for a lit check-engine light.
Electrical system (20 complaints on the 2021): test every light, window, lock, the infotainment screen and the charging system, and have the car scanned for stored fault codes.
Recalls: confirm all 12 campaigns above were completed on this VIN.
Know what to pay for the right 2021 Chevrolet Suburban — then negotiate it
Years-to-avoid tells you which year. Search live listings to see the target price and what verified buyers actually paid for it.
- Verified buyer-paid target price for your exact make, model & trim
- DealDrive AI negotiator reads any dealer quote and writes your counteroffer
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Found a 2021 Chevrolet Suburban for sale? See what the seller isn't telling you.
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FAQ
Is the 2021 Chevrolet Suburban reliable?
2021 Chevrolet Suburban: AVOID — 207 owner complaints, 1.7× the Suburban median year by raw count; top issue: engine (92 complaints). CarWhere's verdict score for the 2021 is 3.99, where 1.00 is a typical Suburban year once complaints are weighted for severity and spread over time on the road; the avoid line is 1.60, so this year clears it by 2.39.
What are the most common 2021 Chevrolet Suburban problems?
By NHTSA owner complaints, the most-reported areas on the 2021 Chevrolet Suburban are engine (92, 44%), powertrain / transmission (40, 19%), fuel / propulsion system (22, 11%). The manufacturer has 1,360 service bulletins on file for this model year.
How many recalls does the 2021 Chevrolet Suburban have?
12 recall campaigns on federal record for the 2021 Chevrolet Suburban, most recently 25V274000 (Apr 24, 2025, engine & cooling); 24V797000 (Oct 24, 2024, powertrain / transmission); 22V827000 (Nov 3, 2022, exterior lighting). Recall completion is VIN-specific, so check the exact car.
How do I check a specific 2021 Chevrolet Suburban before buying?
Decode the VIN free at carwhere.com/tools/vin-decoder to confirm the build, then run the $9.99 CarWhere Full VIN Report for the exact VIN — recall, complaint, and service-bulletin record for this model year, the original window sticker where the manufacturer publishes one, and a market price check from verified buyers. One-time purchase, no subscription.
Sources & method
Complaint, recall and service-bulletin counts for the 2021 Chevrolet Suburban come from NHTSA's Office of Defects Investigation; the verdict is CarWhere’s severity-weighted, time-on-road-adjusted score compared with the model’s own median year. Complaints are owner allegations, not verified defects. Full methodology.