2020 Chevrolet BLAZER problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
213 owner complaints analyzed
3 distinct recall campaigns
49,000 mi median reported failure mileage
Scope: 2020 model year. Data snapshot: . 31 complaints include usable failure mileage.
Most common problems
Electrical System is the most frequently named component, appearing in 73 of 213 complaints (34.3%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Steering behavior | 79 | 37.1% |
| Transmission and shifting | 42 | 19.7% |
| Electrical and battery issues | 28 | 13.1% |
| Braking behavior | 12 | 5.6% |
| Engine operation | 6 | 2.8% |
| Fuel system concerns | 1 | 0.5% |
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 |
|---|---|
| Electrical System | 73 |
| Power Train | 71 |
| Engine | 68 |
| Unknown Or Other | 55 |
| Steering | 40 |
| Service Brakes | 10 |
| Fuel/Propulsion System | 4 |
| Suspension | 4 |
Electrical System: 73; Power Train: 71; Engine: 68; Unknown Or Other: 55; Steering: 40; Service Brakes: 10; Fuel/Propulsion System: 4; Suspension: 4
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 12 |
| 25,000 to 49,999 | 4 |
| 50,000 to 74,999 | 8 |
| 75,000 to 99,999 | 5 |
| 100,000 to 149,999 | 1 |
| 150,000 and above | 1 |
Under 25,000: 12; 25,000 to 49,999: 4; 50,000 to 74,999: 8; 75,000 to 99,999: 5; 100,000 to 149,999: 1; 150,000 and above: 1
Under 25,000 miles has the most reports with usable mileage (12). 182 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 | 2 |
| 2021 | 7 |
| 2022 | 9 |
| 2023 | 13 |
| 2024 | 52 |
| 2025 | 84 |
| 2026 | 46 |
2020: 2; 2021: 7; 2022: 9; 2023: 13; 2024: 52; 2025: 84; 2026: 46
Pattern summary
Electrical System leads the component reports. Steering behavior appears in 79 complaint narratives. Transmission and shifting appears in 42 complaint narratives. Electrical and battery issues appears in 28 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 11405615 · 2021-03-30 (March 30, 2021)
IN 2 OCCASIONS MY VEHICLE CAME TO A COMPLETE STOP AND TURNED OFF ON ME. I WAS THINKING IT WAS A SAFETY FEATURE BUT AFTER THE 2ND TIME I WAS CONCERNED. TOOK IT TO DEALERSHIP AND THEY FOUND NOTHING WRONG WITH IT. ON ANOTHER OCCASION I WAS LEAVING MY HOUSE WHEN MY STEERING WHEEL GOT SUPER HARD AND MADE IT VERY DIFFICULT FOR ME TO TURN THE WHEEL. TOOK IT TO DEALERSHIP AND THEY FOUND NOTHING WRONG, ACCORDING TO THEM TRUCK WAS PERFECTLY FINE.
Owner-reported narrative. 6,000 miles reported. Look up ODI 11405615 at NHTSA ↗
Owner report 11490610 · 2022-10-24 (October 24, 2022)
My vehicle idiot lights were flashing and the car felt as if it was going to stall on the road. Dealer said it was a faulty P6. Now when driving the car the entertainment unit locked up. Radio could not be changed, volume lowered. Pedals on steering column don't work. Even when car was shut off the radio still played and would cut off. Called my dealership. The earliest my Chevy dealer can look at it is next week.
Owner-reported narrative. Look up ODI 11490610 at NHTSA ↗
Owner report 11343879 · 2020-08-07 (August 7, 2020)
WITH APPROXIMATELY 1500 MILES ON THE VEHICLE, THE BLAZER'S AUTOMATIC TRANSMISSION FAILED WHILE DRIVING. I WAS STOPPED AT A RED LIGHT. WHEN THE LIGHT TURNED GREEN, I PROCEEDED SLOWLY THROUGH THE INTERSECTION IN A LEFT TURN. AS SOON AS I LEFT THE INTERSECTION, JUST AS THE VEHICLE WOULD TYPICALLY UP-SHIFT, THE RPM SPIKED, THE VEHICLE JOLTED FORWARD, AND THE CHECK ENGINE LIGHT CAME ON. AFTER THE INITIAL JOLT, THE VEHICLE WOULD NOT SHIFT OUT OF FIRST GEAR. I FOUND A SAFE PLACE TO PARK AND STOPPED THE ENGINE. UPON RESTARTING, THE ENGINE LIGHT REMAINE…
Owner-reported narrative. 1,500 miles reported. Look up ODI 11343879 at NHTSA ↗
Owner report 11470265 · 2022-06-21 (June 21, 2022)
The contact owns a 2020 Chevrolet Blazer. The contact stated that after driving into the garage, the engine was turned off but the transmission was left in the drive position. The contact mentioned that the brake was intended to engage in order for the vehicle not to move forward or backward. After exiting the vehicle moments later the vehicle began to roll backward out of the garage. The contact immediately attempted to stop the vehicle from rolling into the neighbor's home by grabbing the driver's side mirror. The contact was able to prevent …
Owner-reported narrative. 4,400 miles reported. Look up ODI 11470265 at NHTSA ↗
Owner report 11405620 · 2021-03-30 (March 30, 2021)
TL* THE CONTACT OWNS A 2020 CHEVROLET BLAZER. THE CONTACT STATED WHILE DRIVING 20 MPH, THE VEHICLE STARTED OVERHEATING. THE CONTACT THEN DROVE THE VEHICLE TO THE SIDE OF THE ROAD AND NOTICED THAT THE VEHICLE WAS LEAKING OIL. THE VEHICLE WAS THEN TOWED TO AN UNKNOWN DEALER. THE CONTACT STATED THAT SEVERAL UNKNOWN WARNING LIGHTS WERE ILLUMINATED. THE VEHICLE WAS TAKEN TO CHEVROLET OF COLUMBUS (2825 MERCHANT MILE, COLUMBUS, IN 47201) WHERE IT WAS DIAGNOSED WITH RODENT DAMAGE TO THE WIRING HARNESS. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER HAD…
Owner-reported narrative. 300 miles reported. Look up ODI 11405620 at NHTSA ↗
Owner report 11514633 · 2023-03-30 (March 30, 2023)
My 2020 Chevy Blazer began demonstrating possible problems with the transmission in November 2021 which have continued to date. The RPMs will rapidly increase and the car will feel as if it is jolting forward. If driving below 20 mphs, when I try to accelerate to a higher speed, the car will drag and then skip forward. I have videos showing this and have taken it to the dealership on two occasions but it couldn't be replicated and no codes show during diagnositics. The car is currently being repaired (at the dealership since 3/18/22) due …
Owner-reported narrative. Look up ODI 11514633 at NHTSA ↗
Owner report 11453468 · 2022-02-22 (February 22, 2022)
The service advisor at the Chevrolet dealership denied a repair to my abs control module because it was a “known issue”. He told my wife and I our car is unsafe to drive And still wants to give it back to us. Other Gm vehicles have recalls open for the same issue one needs to be open for this. Abs lights and multiple others no brakes or random braking.
Owner-reported narrative. Look up ODI 11453468 at NHTSA ↗
Owner report 11659014 · 2025-05-05 (May 5, 2025)
What component or system failed or malfunctioned, and is it available for inspection upon request? Multiple components in the engine timing and transmission system have failed. These include: Camshaft actuator solenoid valve failed twice (at ~30,000 and ~60,000 miles), each time with different DTC codes. Camshaft positioning sensor failed, triggering P0024 (“timing advanced and bouncing around”). Timing chain tensioner spring failed, requiring re-timing. Camshaft carrier case gasket experienced a major oil leak at 59,000 miles. Thermostat …
Owner-reported narrative. Look up ODI 11659014 at NHTSA ↗
Owner report 11559855 · 2023-12-13 (December 13, 2023)
The contact owns a 2020 Chevrolet Blazer. The contact stated that while refueling the vehicle, the contact removed the pump handle from the filler neck, and one of the fuel flappers detached. The contact was concerned about fuel leaking from the fuel tank. The vehicle was taken to the dealer, where it was diagnosed that the filler neck and fuel filler housing needed to be replaced; however, the fuel filler housing was on backorder. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approxim…
Owner-reported narrative. 29,800 miles reported. Look up ODI 11559855 at NHTSA ↗