First generation (crossover revival, C1XX)
2021 Chevrolet Blazer
The most reported problem on the 2021 Chevrolet Blazer is stalling, with 25 complaints, usually around 42,000 miles.
- 134owner complaints
- 1recalls
- 6involved a crash
- 38,000median miles at failure
Newest report Sep 26, 2026 · checked Oct 2, 2026
What is your Blazer doing?
Each one opens a sheet built from the owner reports of that problem on the 2021 model year.
Is the 2021 Chevrolet Blazer reliable?
The 2021 Chevrolet Blazer has 134 owner complaints on file with NHTSA, below the median of 216 for 2021 SUVs on this site. Of the 7 Blazer model years since 2019, it has the 3rd most complaints. Complaint counts rise with sales as well as faults, so read what owners report below before deciding.
At a glance
- Next to the 2020 and 2022
- Complaints ease off across these three model years. Counted per year on the road, the 2020 draws 31, the 2021 22 and the 2022 10.
- Top problem
- No problem dominates. The largest, stalling, covers 25 of the 134 complaints (19%), and brake wear is next with 19 (one complaint can fall under more than one problem, so these overlap). A quarter of the 9 owners who gave a mileage for stalling saw it by about 14,000 miles, and half by about 42,000.
- Crash, fire and injury reports
- 7 of the 134 complaints (5%) report a crash, a fire or an injury, about the 6% typical of vehicles on this site. Counted separately (one report can carry more than one), 6 reports mention a crash, 1 mentions a fire and 7 people were hurt.
- Recalls behind the top problems
- No recall on file is on the same system as stalling. For those, the complaints are all there is.
- When owners filed
- Filings jumped in 2025, with 60 complaints, 4.3 times the next busiest year. So far in 2026, 33 more have come in.
When each problem shows up
Each bar covers the middle half of the mileages owners reported for that problem. A quarter saw it earlier, a quarter later. The tick is the median. Most reported: engine stalls or loses power while driving, 25 complaints.
middle half of reports, median tick. The heavier grey bars have 75 or more reports.
Behind you
Around your mileage
Ahead of you
How this compares
134 complaints is 1.4 times fewer than the median 2021 model on this site and 1.6 times fewer than the median 2021 SUV. Among the 3 Blazer model years here it ranks 3rd for complaints. Counts follow sales volume as much as reliability, so a truck that sells 700,000 a year draws more reports than a sedan that sells 200,000.
Service bulletins for the 2021 Chevrolet Blazer
Chevrolet filed 814 bulletins and other notices with NHTSA that list the 2021 Chevrolet Blazer. 73 of them deal with a problem owners have reported on this car, 1 of those a warranty extension. Newest first.
Federal rules make a manufacturer send NHTSA a copy of any notice about a defect that goes to more than one dealer or owner. Most of these are service bulletins, the repair instructions manufacturers send to dealers. NHTSA generally leaves safety recall bulletins out of this file, and recalls are listed separately.
Engine stalls or loses power while driving 8 bulletins · 25 complaints
This service bulletin provides a procedure to replace the FPDCM if found to cause customers concerns of Crank No Start, Stalling, Malfunction Indicator Lamp (MIL) Illuminated – DTC P023F or P129F Set.
This service bulletin provides repair information to correct a customer concern of No Crank, No Start, Quick Start/Stall, No FOB Detected, Key FOBs Inoperative, B3924 00, B3925 00, B3926 00, B3927 00, B3928 00 Set.
6 more on this problem
This service bulletin advises the tech that the rotational Clicking Noise Heard After Engine Shut Down may be normal characteristics of the vehicle.
This Preliminary information communicates a vehicle may come to the dealer with a complaint of no start, stalling, rough idle, no acceleration, loss of power, erratic shifting, fuel gauge inoperative, MIL illuminated with various codes stored.
This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on.
This bulletin provides a procedure to replace the FPDCM if found to cause customers concerns of Crank No Start, Stalling, Loss of Power, Fuel Gauge Inoperative/Erratic, MIL Illuminated - DTC P023F and/or P129F Set.
This Preliminary information communicates that a rotational clicking noise heard after engine shut down is a design characteristic and no repairs should be attempted.
This service bulletin provides a procedure to correct a customer concern of Loss of Power Steering Assist, Service Power Steering and/or Steering Assist is Reduced Drive with Care Message Displayed on Driver Information Center (DIC).
Brakes grind, pulse or wear early 4 bulletins · 19 complaints
This technical bulletin provides repair information to correct a customer concern of hearing front brake grind/groan noise after sitting overnight.
This service bulletin provides information to dealership personnel that after performing a brake inspection, brake pad replacement, or any other repair that requires the caliper piston to be reseated may be causing DTC C05B0 to falsely set for eBoost ...
2 more on this problem
This service bulletin provides information for tire pressure monitoring (TPM) system concerns.
This Preliminary information communicates that a dealer may encounter a vehicle that is making a grinding or growling noise on the first few brake applications after the vehicle has been sitting overnight.
Engine overheats or leaks coolant 12 bulletins · 17 complaints
Certain vehicles listed above, may have a condition that could cause the engine coolant thermostat to open at a lower temperature than intended.
This service bulletin provides a procedure to test and replace the battery distribution fuse block if found the cause of the DTC and electric coolant pump inoperative.
10 more on this problem
This engineering information (EI Lite) closure ends the need for technicians to submit pictures using the FPR App process in regard to coolant leaking around the Coolant Control Valve (CCV).
This Preliminary information communicates to dealers? information related to a Malfunction Indicator Lamp (MIL) Illuminated due to a U0672 setting. Advises the technician to perform Electric Engine Coolant Pump connection inspections.
This engineering information (EI Lite) is requesting technicians use the FPR App process in regard to finding coolant leaking around the Coolant Control Valve (CCV).
This service bulletin provides a repair procedure to correct a customer concern of Coolant and/or Oil Leak, Malfunction Indicator Lamp (MIL) Illuminatedâ.
This technical bulletin provides repair information to correct a customer concern of DTC P261F â Coolant Pump A Stuck On Setting Check Engine Lamp to Illuminate After Two Faults.
This Preliminary information communicates the possibility of the engine running hot or overheating with no DTC's due to inaccurate coolant temperature sensor located on the coolant pump outlet pipe.
This Preliminary information communicates the possibility of a inaccurate #1 Coolant Temperature Sensor causing the engine to run hot or overheat with possible over temperature message displayed on DIC
This service bulletin provides diagnostic information for the technician regarding a customer concern of engine overheating, cooling system contaminated with engine oil.
This Preliminary information communicates that a customer may bring a vehicle in with an SES light on. If the technician finds a code P2B87 (auxiliary coolant pump underspeed) set in the ECM they are directed to not replace the G17 heater coolant pump because ...
Service Update. A small number of vehicles may have a coolant inlet pipe that may present an obstructed threaded hole for the coolant temp sensor which could result in the check engine light coming on or a potential coolant leak.
Check engine light or misfire 17 bulletins · 16 complaints
This Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set.
This Preliminary information communicates a possible issue with the active fuel management rockers causing a misfire and the correction for this concern.
15 more on this problem
This service bulletin provides inspection/diagnosis/correction information on a cold start misfire and/or rough idle and DTC P0300 that may also be set.
This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce ...
Special Coverage. Certain vehicles, equipped with a 2.0 gasoline engine (RPO LSY), may have a condition that could cause the evaporative emissions purge pump to fail.
This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to ...
This technical bulletin provides repair information to correct a customer concern of an Intermittent Check Engine Lamp On with Various DTCs Set.
This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D
This Preliminary information communicates the possibility of dtc p0299 due to a stuck open Charge Air Bypass Valve
This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set.
This technical bulletin provides repair information to correct a customer concern of a Check Engine Lamp Illuminated in the DIC (Driver Information Center), Temperature Gauge Inaccurate, and/or Cooling Fans Continue Running after Vehicle is Turned Off, with ...
This service bulletin advises the technician of a diagnostic test for a possible issue with a damaged OCV solenoid that may cause an oil leak and misfire, illuminating the MIL and setting DTCs P0300, P0302 and/or P0305.
Plus 5 older ones not listed here.
Power steering cuts out or goes heavy 1 bulletin · 13 complaints
This Preliminary Information communication provides information to the technician with additional information on the functionality of Lane Keep Assist.
A/C blows warm or the compressor fails 5 bulletins · 12 complaints
PI to help diagnose A/C concern
This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air.
3 more on this problem
This technical bulletin provides a procedure on the A/C blows warm air intermittently and/or takes a long time to cool.
This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to air conditioning repairs, or other repairs the require the evacuation of the a/c refrigerant.
This preliminary information addresses the possibility for the air conditioning to be slow to cool the cabin due to contamination in the refrigerant.
Battery dies or the car will not start 7 bulletins · 9 complaints
This bulletin provides a procedure on how to check for a battery drain utilizing the Picoscope and how to measure the load on the system that may be causing a drain.
This 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, Reduced Steering and/or Stabilitrak Message Illuminated on DIC, multiple DTCs.
5 more on this problem
This service bulletin provides a procedure to replace the FPDCM if found to cause customers concerns of Crank No Start, Stalling, Malfunction Indicator Lamp (MIL) Illuminated – DTC P023F or P129F Set.
This Preliminary information communicates a vehicle may come to the dealer with a complaint of no start, stalling, rough idle, no acceleration, loss of power, erratic shifting, fuel gauge inoperative, MIL illuminated with various codes stored.
This technical 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, Reduced Steering and/or Stabilitrak Message Illuminated on DIC, multiple DTCs.
This Preliminary information communicates that a vehicle may come into the dealer with various concerns which may include a service engine light or various warning messages on the DIC.
This Preliminary Information communication provides information to the technician about a no start or another concern after swapping an Engine Control Module or other modules from one vehicle to another.
Infotainment, screen or backup camera fails 19 bulletins · 8 complaints
This Preliminary information communicates A vehicle may be encountered with door chimes, dome lamps, mirrors inop or a radio that will not shut off when the door is opened. The tech is directed to inspect X500 and X600 for water intrusion.
This service bulletin provides a procedure to correct radio software concerns.
17 more on this problem
This service bulletin provides repair information to correct a customer concerns of Radio Software issues.
This PI states that a vehicle may exhibit a concern of the cross traffic alert indicators not displaying on the radio screen.
This service bulletin provides repair information to correct a customer concern of Instrument Cluster DIC Displays Programming in Progress Message and Progress Bar.
This service bulletin provides repair information to update radio software to correct customer concerns of Software related issues.
This service bulletin provides repair information to correct a customer concern of Rear View Camera Issues - DTCs B395A, B395B, B395C, B101E, B101D.
This service bulletin provides repair information to correct a customer concern of Rear View Camera Coaxial Related Issues - DTCs B395A, B395B, B395C, B101E, B101D.
This service bulletin provides repair information on release of Radio Software Version V160 Update to correct customer concerns of radio software issues.
This service bulletin provides repair information to correct a customer concern of Blue or Black Screen and Service Rear Vision System Message on Radio Display Shifting into Reverse.
This service bulletin provides repair information to correct a customer concern of Rear View Camera Display Gridlines Dim.
This Preliminary information communicates that a customer may notice that the gridlines on the backup camera are very dim. They may mention that this occurred after an OTA update. The dealer technician is advised to perform no repairs.
Plus 7 older ones not listed here.
Complaints filed by year
60 complaints came in 2025, 4.3 times the year before. Owners file in waves when a problem gets press or an investigation, so a spike measures attention as much as failures.
Recalls that include the 2021 Chevrolet Blazer
Whether your car is included depends on its VIN. Check yours at nhtsa.gov/recalls.
General 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.
Risk and remedy
Remedy: 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.
The recall on the 2021 Chevrolet Blazer, with the owner complaints on each recalled system
Guide Buying one used? How to research one car’s history before you pay
Questions
What is the most common problem on the 2021 Chevrolet Blazer?
Stalling, with 25 of the 134 complaints. Owners who gave a mileage for it put the median at about 42,000 miles.
At what mileage do 2021 Chevrolet Blazer problems start?
Of the 56 complaints that give a mileage, a quarter came by about 18,000 miles and half by about 38,000.
Is the 2021 Chevrolet Blazer better or worse than the 2020 and 2022?
Counted per year on the road, the 2021 has fewer complaints than the 2020 and more complaints than the 2022: 22 a year against 31 and 10.
How many 2021 Chevrolet Blazer complaints involve a crash, fire or injury?
7 of them (5%). The typical vehicle on this site is at 6%.
Is there a recall for stalling on the 2021 Chevrolet Blazer?
No recall on file for the 2021 Chevrolet Blazer is on the same system as stalling. Another recall may still cover your car, so check its VIN at nhtsa.gov/recalls.