2021 Chevrolet Blazer Brakes Problems
- Complaints
- 21about this part
- Share
- 15%of 141 total for the year
- Median mileage
- 429miles
- Trend
- RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA recorded 21 complaints about the brakes of the 2021 Chevrolet Blazer, 15% of the 141 complaints for this model year. Where a mileage was given, the median is 429 miles.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The vehicle’s brakes failed while I was driving. I was luckily able to steer the vehicle off the road narrowly avoiding hitting another car. We had the vehicle towed to a Chevy dealer and they told us the fault was due to a low voltage battery. They would also not drive the vehicle until the battery was replaced because it was giving an error message of “brake system failure”. The dealer is the only place that has inspected the vehicle at this time. The warning messages appeared at the time of failure and not before. …”
NHTSA complaint #11655932, filed 2025-04“I am reporting a serious safety concern involving my 2021 Chevrolet Blazer, which experienced brake failure while driving, without any warning lights or diagnostic alerts from the vehicle’s onboard system. This created a highly dangerous situation for myself and others on the road. Prior to this incident, I brought the vehicle to the dealership after consistently hearing squealing or screeching noises when braking. The issue was dismissed and attributed to a change in federal regulations limiting the use of copper in brake pads—without any further inspection. …”
NHTSA complaint #11667583, filed 2025-06“While driving my 2021 Chevrolet Blazer LT on the freeway with my wife and child, the “Brake Assist” warning came on and the brake pedal suddenly became extremely stiff. I was going about 65 mph, and it became difficult to slow down safely. We were terrified. This created a serious safety hazard, as I almost couldn’t stop in time and could have caused a crash or gotten someone killed. The check engine light came on as well. I had previously taken the vehicle in for a similar rattling or braking noise back in 2021 and was told it was “fine.” Now the issue seems to have gotten worse. …”
NHTSA complaint #11676544, filed 2025-07“My 2021 Chevrolet Blazer experienced brake failure while driving, without any warning lights or diagnostic alerts from the vehicle’s onboard system prior to. This created a very dangerous situation for myself and others on the road, including my family who was in the car as well. Prior to this incident, I brought the vehicle to the dealership not long after purchasing it because I was constantly hearing screeching noises when braking. I thought it was rather soon to need new brakes, considering I purchased the vehicle brand new, but the issue was dismissed without any further inspection. …”
NHTSA complaint #11670018, filed 2025-06“The brakes failed on my SUV as I was driving on a city street. Yes it is available for inspection. Losing my breaks almost caused a collision with the car in front of me but due to the distance between the cars and the low speed at the time, I was able to avoid collision and detour into a parking lot where I cruised to a stop with the help of a parking lot space concrete stop. The problem was not reproduced by me but the service center computer diagnostics confirmed break issues. The service center says that the cause was low voltage of the car battery which affected the brakes. …”
NHTSA complaint #11625772, filed 2024-11Related service bulletins
- 11017508Apr 3, 2025This service bulletin provides a procedure to add deadener to the batter tray bracket to correct customer concerns of a Service Engine Soon (SES), Reduced Power, Service Brake…
- 11017173Mar 21, 2025This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for analysis.
- 11014230Jan 31, 2025This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
- 11012931Jan 9, 2025This technical bulletin provides repair information to correct a customer concern of hearing front brake grind/groan noise after sitting overnight.
- 11011990Nov 26, 2024This service bulletin provides a procedure to clean the back side of the rims and rotors and to correct the customer concern of wheel clicking.
- 11011709Nov 5, 2024This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
Brakes: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 7 | 21% |
| 2024 | 14 | 27% |
| 2023 | 10 | 23% |
| 2022 | 8 | 15% |
| 2021 | 21 | 15% |
| 2020 | 11 | 5% |
| 2019 | 14 | 7% |
| 2007 | 1 | 11% |
| 2006 | 1 | 5% |
| 2004 | 7 | 14% |
| 2003 | 8 | 10% |
| 2002 | 23 | 9% |
| 2001 | 51 | 16% |
| 2000 | 63 | 11% |
| 1999 | 70 | 16% |
| 1998 | 69 | 10% |
| 1997 | 156 | 20% |
| 1996 | 443 | 38% |
| 1995 | 531 | 43% |
| 1994 | 434 | 70% |
| 1993 | 377 | 74% |
| 1992 | 206 | 74% |
| 1991 | 129 | 58% |
| 1990 | 8 | 25% |
| 1989 | 7 | 18% |
| 1988 | 2 | 5% |
| 1987 | 1 | 3% |
| 1986 | 3 | 16% |
| 1985 | 5 | 17% |
Other parts of the 2021 Chevrolet Blazer
42 complaintsElectrical system
40 complaintsOther or unknown
24 complaintsTransmission and drivetrain
19 complaintsFuel system
18 complaintsSteering
15 complaintsForward collision avoidance
8 complaintsTires
5 complaintsSuspension
4 complaintsEngine cooling
3 complaintsLane departure
3 complaintsAir bags
2 complaints
← All problems reported for the 2021 Chevrolet Blazer
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology