2021 Chevrolet Blazer Other or unknown Problems
- Complaints
- 24about this part
- Share
- 17%of 141 total for the year
- Median mileage
- 4,400miles
- Trend
- RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA recorded 24 complaints about the other or unknown of the 2021 Chevrolet Blazer, 17% of the 141 complaints for this model year. Where a mileage was given, the median is 4,400 miles. 1 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“My wife and I were just driving and suddenly the motor started stopping installing. We managed to get over toward the curb and shut the motor off and restart it. Then it ran normal. When it did stall out, and we made it to the curb, it shut itself off. That was yesterday then this morning it started to do it a little bit when we left the house.”
NHTSA complaint #11771904, filed 2026-10“Power Liftgate randomly opens when driving or parked. Even when the power switch is turned to off the liftgate will unlock randomly either parked or driving. I have contacted the dealer and GM no recall currently exists. Dealer recommended replacing the latch mechanism which I have ordered to replace myself.”
NHTSA complaint #11607401, filed 2024-08“Midway home I got a message on my dashboard “steering assist reduced - drive with care”, but my power steering was still functional. I parked my car in the driveway, shut it off, and the cooling fans started blowing excessively. This continued for 5-ish minutes before shutting off on its own. Then I noticed that the engine temp gauge wasn’t working. Unsure if this is a problem with the thermometer or the sensor currently.”
NHTSA complaint #11662198, filed 2025-05“At 48,000 miles, check engine light came on and loud fan sound continued after turning car off. Took car to dealership where I was informed I needed a new radiator and it is not covered by warranty.”
NHTSA complaint #11721657, filed 2026-03“Request for Recall Review – 2021 Chevrolet Blazer Steering Assist and Cooling Fan Issue Hello, I am writing to report a recurring issue with my 2021 Chevrolet Blazer and to request that this concern be reviewed for possible recall or warranty coverage. The vehicle frequently displays an “Action Required: Steering Assist is Reduced. Drive with Care” message while driving. Additionally, after shutting off the vehicle, the engine cooling fan continues to run for up to 20 minutes, as if the vehicle is overheating. …”
NHTSA complaint #11692416, filed 2025-10Related service bulletins
- 11037555Sep 26, 2026This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
- 11037253Sep 4, 2026This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
- 11036392Aug 20, 2026This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
- 11035340Jul 21, 2026PI to help diagnose A/C concern
- 11034769Jun 23, 2026This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.
- 11032764May 11, 2026Pi created to provide GM dealers with information on gathering information for projection issue
- 11032763May 11, 2026This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
- 11030974Apr 1, 2026This preliminary information communicates information about how to determine if a wheel and tires size change is available.
- 11030532Mar 21, 2026Improvements to OnStar functionality.
- 11030092Mar 9, 2026This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
Other or unknown: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 9 | 26% |
| 2024 | 9 | 17% |
| 2023 | 3 | 7% |
| 2022 | 9 | 17% |
| 2021 | 24 | 17% |
| 2020 | 57 | 25% |
| 2019 | 54 | 29% |
| 2007 | 1 | 11% |
| 2004 | 1 | 2% |
| 2003 | 1 | 1% |
| 2002 | 7 | 3% |
| 2001 | 10 | 3% |
| 2000 | 17 | 3% |
| 1999 | 12 | 3% |
| 1998 | 14 | 2% |
| 1997 | 27 | 4% |
| 1996 | 14 | 1% |
| 1995 | 36 | 3% |
| 1994 | 8 | 1% |
| 1993 | 3 | 1% |
| 1992 | 2 | 1% |
| 1991 | 2 | 1% |
| 1990 | 2 | 6% |
| 1988 | 1 | 3% |
| 1987 | 1 | 3% |
| 1984 | 1 | 11% |
Other parts of the 2021 Chevrolet Blazer
42 complaintsElectrical system
40 complaintsBrakes
21 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