2020 Chevrolet SUBURBAN problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
44 owner complaints analyzed
4 distinct recall campaigns
30,000 mi median reported failure mileage
Scope: 2020 model year. Data snapshot: . 13 complaints include usable failure mileage.
Most common problems
Engine is the most frequently named component, appearing in 17 of 44 complaints (38.6%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Transmission and shifting | 12 | 27.3% |
| Braking behavior | 7 | 15.9% |
| Steering behavior | 7 | 15.9% |
| Electrical and battery issues | 4 | 9.1% |
| Fuel system concerns | 2 | 4.5% |
| Engine operation | 1 | 2.3% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Engine | 17 |
| Power Train | 10 |
| Electrical System | 7 |
| Steering | 4 |
| Unknown Or Other | 4 |
| Fuel/Propulsion System | 3 |
| Service Brakes | 3 |
| Vehicle Speed Control | 3 |
Engine: 17; Power Train: 10; Electrical System: 7; Steering: 4; Unknown Or Other: 4; Fuel/Propulsion System: 3; Service Brakes: 3; Vehicle Speed Control: 3
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 6 |
| 25,000 to 49,999 | 1 |
| 50,000 to 74,999 | 1 |
| 75,000 to 99,999 | 4 |
| 100,000 to 149,999 | 0 |
| 150,000 and above | 1 |
Under 25,000: 6; 25,000 to 49,999: 1; 50,000 to 74,999: 1; 75,000 to 99,999: 4; 100,000 to 149,999: 0; 150,000 and above: 1
Under 25,000 miles has the most reports with usable mileage (6). 31 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2020 | 6 |
| 2021 | 3 |
| 2022 | 1 |
| 2023 | 3 |
| 2024 | 6 |
| 2025 | 16 |
| 2026 | 9 |
2020: 6; 2021: 3; 2022: 1; 2023: 3; 2024: 6; 2025: 16; 2026: 9
Pattern summary
Engine leads the component reports. Transmission and shifting appears in 12 complaint narratives. Braking behavior appears in 7 complaint narratives. Steering behavior appears in 7 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 11623855 · 2024-11-06 (November 6, 2024)
On October 27, coming back from a family trip at 10 PM at night on a major highway, the suburban all of a sudden quit. Traveling at 70 miles per hour, all of a sudden, when pressing the gas pedal, the car would not accelerate and the RPM gauge was erratically moving. The car started to slow down till it eventually just quit and it would not go anymore. We were stranded in the middle of the highway with cars coming and going both ways. It was scary, it was dark, and dangerous. A tow truck was called and they told the suburban to a Chevrolet deal…
Owner-reported narrative. Look up ODI 11623855 at NHTSA ↗
Owner report 11640868 · 2025-02-05 (February 5, 2025)
The contact owns a 2020 Chevrolet Suburban. The contact stated while driving 10 MPH and depressing the accelerator pedal, the vehicle failed to respond as needed. No warning lights were illuminated. The contact pulled over and turned off and restarted the vehicle however, the failure persisted. The contact stated that the dealer was contacted. The vehicle was towed to a dealer and was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. The VIN was not included …
Owner-reported narrative. 93,000 miles reported. Look up ODI 11640868 at NHTSA ↗
Owner report 11307573 · 2020-02-06 (February 6, 2020)
2020 CHEVROLET SUBURBAN. UPON VEHICLE START: STEERING ASSIST, TRAILER BRAKE SYSTEM, STABILITY TRACK ALL INOP. TACHOMETER AND SPEEDOMETER INOP. NO REVERSE GEAR. WHEN IN DRIVE, ONLY FIRST GEAR OBTAINABLE AND MANUAL SHIFT MODE INOP. SEAT HEAT INOP. TURNED OFF AND RESTARTED APPROX FIVE TIMES AND ISSUES REMAINED. UPON SIXTH RESTART ISSUES NO LONGER PRESENT. DROVE 15 MILES HOME. VEHICLE SAT 2 HOURS, THEN RESTARTED AND OPERATED NORMALLY FOR 1/2 HOUR OPERATION, THEN TURNED OFF. VEHICLE OPERATED NORMALLY TWICE WITHIN TWO HOUR PERIOD…
Owner-reported narrative. 775 miles reported. Look up ODI 11307573 at NHTSA ↗
Owner report 11349569 · 2020-08-15 (August 15, 2020)
WHEN ADAPTIVE CRUISE IS ENGAGED, THE SYSTEM HESITATES WHEN LEAD VEHICLES SLOWS AT A SLOW RATE (NO BRAKE LIGHTS OBSERVED ON LEAD VEHICLE), REQUIRING OPERATOR TO APPLY BRAKES. WHEN ADAPTIVE CRUISE CONTROL IS ENGAGED DURING HIGHWAY DRIVING, INTERMITTENTLY, MEDIUM SLOWING OF LEAD VEHICLE (BRAKES APPLIED) THE VEHICLE DOES NOT REACT IN TIME TO AVOID COLLISION WITHOUT ACTIVE AND HEAVY BRAKE APPLICATION (JERKING DRIVER AND/OR PASSENGER) TO AVOID COLLISION. ABOVE 65 MILES AN HOUR THE ADAPTIVE CRUISE CONTROL DOES NOT LEAVE ADEQUATE DISTANCE BETWEE…
Owner-reported narrative. 200 miles reported. Look up ODI 11349569 at NHTSA ↗
Owner report 11424349 · 2021-07-12 (July 12, 2021)
While turning at driving speed I feel as if I loose control of the steering for a split second. The front wheels feel like they begin to turn without me turning the steering wheel. This has happened at least a dozen times in the 6000 miles I have put on the car. It is extremely dangerous especially on wet roads. I have not reported this to GM. I was searching the internet for a recall and found your website.
Owner-reported narrative. Look up ODI 11424349 at NHTSA ↗
Owner report 11522047 · 2023-05-15 (May 15, 2023)
My car shut off two times while driving. When you google the issue, it auto populates meaning that this is a very common issue with GM. It starts back to 2015 searches as well. GM needs to recall their suburbans for their cars turning off while driving which caused me to lose power steering, power brakes and anything that requires electrical.
Owner-reported narrative. Look up ODI 11522047 at NHTSA ↗
Owner report 11645902 · 2025-03-03 (March 3, 2025)
engine replacement at 120,000 miles. I was told by Mechanic that the 2020 Suburban's have a problem with the fuel injector wiring harness dry rotting and the sensor changing the engine from V8 to V6 when on highway going bad causing misfire in engine and ruining the engine.
Owner-reported narrative. Look up ODI 11645902 at NHTSA ↗
Owner report 11590849 · 2024-05-26 (May 26, 2024)
Fuel injector failed and pumped too much gas into cylinder causing gas to get into engine oil and ruin engine. GM claims they are building the replacement engine, but won't give any estimate of when it will be fixed. Other dealers that are receiving these engines will not sell the engine to my dealer. I believe there is a bigger problem that GM will not admit to and they should be held accountable. Four months is too long for this situation to exist!
Owner-reported narrative. Look up ODI 11590849 at NHTSA ↗
Owner report 11723053 · 2026-03-09 (March 9, 2026)
The contact owns a 2020 Chevrolet Suburban. The contact stated that while driving at an undisclosed speed, the vehicle failed to accelerate as intended while depressing the accelerator pedal, and the vehicle stalled. A passerby helped the contact to push the vehicle into a parking lot. There was no warning light illuminated. The contact left the vehicle in the parking lot. The following day, the vehicle restarted as intended. The contact stated that on a separate occasion, the vehicle failed to start. The Push to Start button occasionally becam…
Owner-reported narrative. 90,000 miles reported. Look up ODI 11723053 at NHTSA ↗