Wrench.Pro

2021 Chevrolet Blazer: raw data

Every record we hold for this vehicle, as plain tables, with nothing added. The consumer page shows the same records with the maintenance schedule, price ranges and nearby shops around them.

vehicle2021 / chevrolet / blazer
known issues7 clusters (reviewed 2026-08-21)
complaints133 on file (2021-03-15 → 2026-09-17)
recalls1
investigations0
fars10 occupant deaths, crash years 2010-2024 (legacy-code)
indexedyes
licenseCC BY 4.0 (derived)

Known Issues clusters all years →

Thermostat / ECT sensor failure with post-shutdown fan run-onENGINE AND ENGINE COOLING, ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN28 complaints2024-10-17 → 2026-07-21blazer-2021-thermostat-ecct-cooling-fan
  • 11703920 "Steering assist reduced" message was displayed. At the same time the temperature gauge stopped working and after I shut the car off, the motor fan ran full force for 10+ minutes. Shows no check engine light
  • 11627479 P0128, AC not working, Steering Assist Reduced, and Temp Gauge not working. Problem caused by faulty ECT wiring. First the problem is the ECT is a two wire (signal + and -) 26 gauge wire running through the ignition coil wire harness
  • 11646473 The contact stated that upon turning off the vehicle, the fan remained engaged for approximately 10 minutes. Additionally, the contact stated that the A/C system was intermittently inoperable. The contact stated while driving at an…
Fuel pump control module failure causing stallFUEL/PROPULSION SYSTEM14 complaints2022-02-19 → 2026-07-09blazer-2021-fuel-pump-control-module
  • 11684653 I was driving down 776 (a busy highway)Blazer completely shut off, so scary almost got hit by a semi, I don’t know how he managed to get around me , I jumped out of car! Sure…
  • 11670138 Fuel pump module. Driving highway speeds lost all engine power as car sputtered to a stop. Luckily car srill ran enough to maintain power steering and brake function. No warning lights.Thought it was bad fuel as I had filled the tank the prior…
  • 11631586 I went to restart the vehicle to leave and I noticed the check engine light on. Since the vehicle seemed to be driving okay I thought I could make it home and check the car's computer to see what the issue was. As I was leaving the parking lot I…
Transmission slipping, loss of gear, and complete failurePOWER TRAIN10 complaints2021-10-07 → 2026-07-21blazer-2021-transmission-powertrain-failure
  • 11577420 I was driving on the highway when my car started operating like it was in neutral. RPMs was high but the car started to stall and slow down and because of it I had to immediately pull over. The car would not go into gear. I attempted to put it in…
  • 11733441 The transmission (powertrain) developed a delay when shifting into reverse, followed by harsh engagement. The condition worsened over time and resulted in a complete loss of reverse. The vehicle will not move when shifted into reverse
  • 11648760 there was an abnormal roaring sound coming from the engine compartment. There was no warning light illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the transmission. The contact was informed there were metal fragments inside
Steering assist reduction and steering gear failureSTEERING9 complaints2024-01-29 → 2026-05-19blazer-2021-steering-assist-reduced
  • 11635399 I have a 2021 Chevy Blazer that has 31,0000 miles and my steering locked up. I was driving and barley got into a parking lot. Told by a certified dealer it is the power steering gear and possible the power steering module. No parts available and no…
  • 11738765 The vehicle showed an error on the dash which stated "Action Required Steering Assist is Reduced Drive with Care" I tool the vehicle to the dealer I purchased it from McClusky Chevy at Kings Auto Mall in Mason Ohio. They informed me that the error code is…
  • 11539220 The contact stated while driving 69-70 MPH, the steering wheel strongly pulled to the left side and into the roadway median. There was no warning light illuminated. The contact stated that the vehicle hit the median and bounced, facing incoming traffic
Brake system failure including vacuum pump and pedal stiffnessSERVICE BRAKES11 complaints2021-05-04 → 2025-07-30blazer-2021-brake-system-failure
  • 11676544 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
  • 11670018 After the brake failure, service technicians discovered that the vacuum pump had failed, causing the brakes to fail which led to engine damage by projecting shrapnel into the engine. This has rendered a $35,000 car purchase useless after 4 years of use
  • 11675890 Brakes bottomed out. Message on my dash board said “Brake System Failure reduce speed to 62” and the brake went on the way to the floor
Infotainment system "Update Failed" rendering screen inoperableELECTRICAL SYSTEM2 complaints2025-03-19 → 2025-03-31blazer-2021-infotainment-update-failure
  • 11650964 I got home from work, locked my car up for the night with everything working perfectly fine, then came out to leave for work the next morning to find “update failed. Return to dealer” on the infotainment screen. I did some pretty extensive…
  • 11649907 when I start my vehicle, my infotainment screen that I use for GPS and other features that are included in the safety of the car, and the screen just says, “Update Failed, Return to Dealer.”. The service advisor at Chevy says that this happens and…
Camshaft carrier oil leak attributed to sealant applicationENGINE2 complaints2024-05-07 → 2026-04-28blazer-2021-camshaft-carrier-oil-leak
  • 11734437 Both camshaft carriers failed due to a manufacturing defect. According to NHTSA bulletins 21-NA-240 and PIP5755, the oil leak from the cam carrier is caused by improper sealant application during manufacturing. Although the dealer addressed the issue, it was clearly not a…
  • 11731606 The vehicle had an oil leak from both the left and right camshaft carriers. The dealer confirmed the issue and carried out the necessary repairs. Because the leak was not easily detectable, it could have led to engine failure while driving

NHTSA complaints (summary) all years →

countearliest_datelatest_datecrash_flaggedfire_flaggedtop_components
1332021-03-152026-09-1761ENGINE:41; ELECTRICAL SYSTEM:38; UNKNOWN OR OTHER:20; SERVICE BRAKES:19; POWER TRAIN:18

Recalls all years →

campaign_numberreport_received_datecomponentsummaryconsequenceremedy
20V81100023/12/2020SEAT BELTSGeneral Motors, LLC (GM) is recalling certain 2020 Chevrolet Bolt EV and 2021 GMC Canyon and Sierra 1500, 2500 and 3500, Yukon, Yukon XL, Cadillac Escalade and Escalade ESV and Chevrolet Blazer, Camaro, Colorado, Equinox, Silverado 1500, 2500 and 3500, Suburban and Tahoe vehicles. Incorrect bolts may have been used at one or more fastening locations to secure the seat belts to the vehicle. If an incorrect bolt was used, the seat belt may not be properly attached to the vehicle.If a seat belt assembly is not properly attached to the vehicle, the seat belt may not properly restrain an occupant in the event of a crash, increasing the risk of injury.GM will notify owners, and dealers will replace the suspect bolts, free of charge. The recall began January 29, 2021. Owners may contact GMC customer service at 1-800-462-8785, Cadillac customer service at 1-800-458-8006, or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N202322230.

Investigations all years →

none listed

FARS occupant deaths all years →

crash_yearsoccupant_deathsmatch_typevpic_recovered
2010-202410legacy-code10

FARS counts every occupant death in a fatal crash, whatever the cause — it does not mean the vehicle was at fault or defective. Counts are not adjusted for how many of each vehicle are on the road.

Cite this

Derived data is CC BY 4.0. Link back to the page you used. Text and BibTeX below.

Wrench.Pro (2026). 2021 Chevrolet Blazer vehicle data [dataset]. https://www.wrench.pro/data/vehicles/2021/chevrolet/blazer
@misc{wrenchpro_2021_chevrolet_blazer_2026,
  author = {Wrench.Pro},
  title = {Wrench.Pro vehicle data: 2021 Chevrolet Blazer},
  year = {2026},
  howpublished = {\url{https://www.wrench.pro/data/vehicles/2021/chevrolet/blazer}},
  note = {Derived from NHTSA public records. CC BY 4.0.}
}

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