Most common 2021 Chevrolet Trailblazer problems
Share of the 196 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Chevrolet Trailblazer complaints by model year
Best Trailblazer years: 2021, 2022. Years to avoid: 2005, 2002, 2006, 2004. Compare all years →
2021 Chevrolet Trailblazer recalls (4)
Equipment › Mechanical › Accessory scissor/screw/bottle jack/lift › Stand
General Motors, LLC. (GM) is recalling certain 2020-2022 Buick Encore GX and 2021-2022 Chevrolet Trailblazer vehicles. The emergency jack, if not positioned as directed in the vehicle owner's manual, can fracture while in use.
Remedy: Dealers will replace the jack, free of charge. Interim owner notification letters informing owner of the safety risk are expected to be mailed July 26, 2021.
Service brakes
General Motors LLC (GM) is recalling certain 2020 Chevrolet Corvette and Cadillac CT4, CT5 and XT4, 2021 Chevrolet Trailblazer, and 2020-2021 Buick Encore GX vehicles. Sensor connection contamination in the electronic brake boost system may cause an interruption of communication between the sensor and the brake boost system.
Remedy: GM will notify owners, and dealers will replace the electronic brake boost module, free of charge. The recall began December 9, 2020.
Seats › Critical fasteners
General Motors LLC (GM) is recalling certain 2020 Buick Encore GX and 2021 Chevrolet Trailblazer vehicles. The rear attachment bolts of one or both front seats may not have been installed.
Remedy: GM will notify owners, and dealers will inspect seat attachments for both front seats and install attachment bolts as needed, free of charge. The recall began October 1, 2020.
Equipment › Other › Labels
General Motors LLC (GM) is recalling certain 2021 Chevrolet Trailblazer vehicles factory-equipped with optional 17-inch sport terrain tires. The certification label on these vehicles does not provide the tire size and cold tire pressure information for front and rear tires, as required.
Remedy: GM will notify owners, and will mail corrected labels for customers to apply, free of charge. The recall began July 1, 2020. Owners may call Chevrolet customer service at 1-800-222-1020.
What 2021 Chevrolet Trailblazer owners say
Electrical system all 41 →
The contact owns a 2021 Chevrolet Trailblazer. The contact stated that while driving at various speeds, the vehicle made an abnormal popping sound before the power steering and brakes failed. Additionally, the brake pedal became extremely sensitive while gently being depressed causing the vehicle to abruptly stop. The contact had to restart the vehicle to correct the failure. The failure was intermittent. The vehicle was taken to the dealer however, the dealer could not duplicate the failure. The vehicle was taken to another dealer, Frontier Motors Incorporated (31406 US-18, Winner, SD 57580) on numerous occasions and diagnosed with electrical system failure. The dealer reprogrammed the power steering angle sensor and rear differential clutch sensor; however, the failure recurred. The vehicle was not repaired and remained at the dealer. The manufacturer was made aware of the failure. …
The contact owns a 2021 Chevrolet Trailblazer. The contact stated that while driving at an undisclosed speed, the AUTO-STOP was not functioning properly. Additionally, the doors would not unlock on two separate occasions. Additionally, the keyless ignition button would not turn off the vehicle until the contact applied pressure while pressing on the button. The contact also stated that the tire pressure sensor was faulty. The check engine warning light and reduced power message was displayed on the instrument panel. The vehicle was taken to the dealer on two separate occasions and the dealer informed the contact that the AUTO-STOP function was unprogrammed due to the weather however, the dealer was unable to duplicate the failure. The dealer reprogrammed the AUTO-STOP software and tire pressure sensor however, the failure recurred. …
Transmission & drivetrain all 41 →
The contact owns a 2021 Chevrolet Trailblazer. The contact stated while driving 65 MPH the contact struck a deer on the front passenger side causing minor damages to the vehicle. No one was injured. The contact was able to stop on the side of the road. The contact smelled a burning odor and noticed that smoke was coming from the floor of the vehicle on the front passenger side near the seat belt assembly. The contact and the passenger were able to exit the vehicle, but after exiting the vehicle burst out in flames. The fire department was able to extinguish the fire. A police report was filed. The vehicle was towed. The manufacturer was not notified of the failure. The failure mileage was 20,000.
The contact owns a 2021 Chevrolet Trailblazer. The contact stated after parking the vehicle and pressing the Push to Start button to turn off the vehicle, an alarm sounded and the message "Shift to Park" was displayed. The contact shifted out of park(P) and slammed the gear shifter into park(P). The contact was then able to park and to turn off the vehicle. The contact stated that the failure recurred intermittently while parking on a level surface. The contact stated that on several occasions the failure required turning off and restarting the vehicle to successfully park the vehicle. Additionally, the contact stated that the failure occurred while attempting to park on an incline. The contact stated that the vehicle was unable to be parked on an incline after several attempts. The dealer was notified of the failure and an appointment was scheduled for diagnostic testing. …
Engine & cooling all 39 →
The contact owns a 2021 Chevrolet Trailblazer. The contact stated that while the vehicle was parked, the vehicle was turned off however, the blower fan independently activated. No warning light was illuminated. The contact's husband had just parked the vehicle upon arriving at the place of employment. The contact's husband is a certified mechanic. The vehicle was diagnosed with coolant intrusion and a misfire in the engine. The contact was informed that the spark plugs needed to be replaced; however, the spark plugs had to be ordered. The vehicle was not repaired. The vehicle was driven to the residence. The contact's husband parked the vehicle and turned the vehicle off. The vehicle failed to start as intended and was towed to the dealer to be diagnosed and the dealer determined that there was a crack in the head gasket. …
The contact owns a 2021 Chevrolet Trailblazer. The contact stated that while driving at an undisclosed speed, the AUTO-STOP was not functioning properly. Additionally, the doors would not unlock on two separate occasions. Additionally, the keyless ignition button would not turn off the vehicle until the contact applied pressure while pressing on the button. The contact also stated that the tire pressure sensor was faulty. The check engine warning light and reduced power message was displayed on the instrument panel. The vehicle was taken to the dealer on two separate occasions and the dealer informed the contact that the AUTO-STOP function was unprogrammed due to the weather however, the dealer was unable to duplicate the failure. The dealer reprogrammed the AUTO-STOP software and tire pressure sensor however, the failure recurred. …
2021 Chevrolet Trailblazer engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 1.3L 3-cyl turbo | CVT | FWD | 29 / 33 / 31 |
| 1.2L 3-cyl turbo | CVT | FWD | 28 / 31 / 29 |
| 1.3L 3-cyl turbo | 9-speed automatic | AWD | 26 / 30 / 28 |
EPA ratings. Class: Small SUV.
Frequently asked questions
Is the 2021 Chevrolet Trailblazer a good car?
Based on 196 owner complaints filed with NHTSA, the 2021 Trailblazer rates better than average: 49% fewer complaints than a typical year of the Trailblazer at the same age. It is one of the best Trailblazer years by this measure. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2021 Chevrolet Trailblazer?
The electrical system — 41 complaints, 21% of all complaints for this model year, most often about ignition › interlock/lockout. Next are the transmission & drivetrain (41) and engine & cooling (39).
How many recalls does the 2021 Chevrolet Trailblazer have?
There are 4 recalls for the 2021 Chevrolet Trailblazer, the most recent from June 10, 2021 (stand). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Chevrolet Trailblazer?
The best years by complaints, compared at the same age, are 2021 and 2022. Years to avoid or approach with caution: 2005, 2002, 2006 and 2004. See the full Chevrolet Trailblazer years comparison.
At what mileage do 2021 Chevrolet Trailblazer problems happen?
The median mileage reported in complaints is about 20,000 miles; 81% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.