First generation (crossover revival, C1XX)
2020 Chevrolet Blazer
The most reported problem on the 2020 Chevrolet Blazer is overheating, with 48 complaints, usually around 55,000 miles.
- 219owner complaints
- 3recalls
- 5involved a crash
- 54,000median miles at failure
Newest report Sep 21, 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 2020 model year.
Is the 2020 Chevrolet Blazer reliable?
The 2020 Chevrolet Blazer has 219 owner complaints on file with NHTSA, close to the median of 233 for 2020 SUVs on this site. Of the 7 Blazer model years since 2019, it has the 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 2019 and 2021
- At 31 complaints for each year on the road, the 2020 runs above both the 2019 (23) and the 2021 (22).
- Top problem
- Two problems run close. Overheating has 48 complaints and A/C failure has 43, out of 219 in all. A quarter of the 18 owners who gave a mileage for overheating saw it by about 50,000 miles, and half by about 55,000.
- Crash, fire and injury reports
- 7 of the 219 complaints (3%) report a crash, a fire or an injury, a little under the 6% typical of vehicles on this site. Counted separately (one report can carry more than one), 5 reports mention a crash and 7 people were hurt.
- Recalls behind the top problems
- No recall on file is on the same system as overheating, power steering loss and misfire. For those, the complaints are all there is.
- When owners filed
- Complaints are still climbing. 2025 brought 84, the most of any year so far. So far in 2026, 52 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 overheats or leaks coolant, 48 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
219 complaints is about the median for a 2020 model on this site and about the median for a 2020 SUV. Among the 3 Blazer model years here it ranks 1st 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 2020 Chevrolet Blazer
Chevrolet filed 855 bulletins and other notices with NHTSA that list the 2020 Chevrolet Blazer. 63 of them deal with a problem owners have reported on this car. 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 overheats or leaks coolant 11 bulletins · 48 complaints
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.
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).
9 more on this problem
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 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 Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have oil mixed in with the engine coolant.
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 a possible noise from the water pump causing a DTC and the diagnostics for the repair.
This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon and may also have an oil or coolant leak. Technician may find coolant or oil in a spark plug tube.
A/C blows warm or the compressor fails 2 bulletins · 43 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.
Power steering cuts out or goes heavy 1 bulletin · 35 complaints
This Preliminary Information communication provides information to the technician with additional information on the functionality of Lane Keep Assist.
Check engine light or misfire 17 bulletins · 35 complaints
This Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set.
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.
15 more on this problem
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 ...
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 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
Special Coverage - Certain vehicles may have a condition that could cause the evaporative emissions purge pump to fail. If this condition occurs, the Malfunction Indicator Light (Check Engine Light) will illuminate and a diagnostic trouble code will set.
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 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.
This service bulletin provides diagnostic strategy information to aid in diagnosing a Ticking, Tap or Rattle Noise from Engine with Possible Misfire, Malfunction Indicator Lamp (MIL) Illuminated.
This service bulletin provides repair information to correct a customer concern of a Check Engine Light Displayed on Driver Information Center (DIC), Engine Cooling Fan Windmilling, DTC P0494 Set.
This Preliminary information communicates additional diagnostic information for DTC's P0016 and P0018.
This technical bulletin provides repair information to correct a customer concern of the Service Engine Soon Lamp illuminated and/or Service Power Brake Assist message displayed, with DTCs P0557 or P0558 Stored.
Plus 5 older ones not listed here.
Infotainment, screen or backup camera fails 16 bulletins · 29 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 repair information to correct a customer concern of Rear View Camera Issues - DTCs B395A, B395B, B395C, B101E, B101D.
14 more on this problem
This service bulletin provides radio software version 135120 (IOR) update procedures to correct customer concerns of software related issues.
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 Radio Software Version U168 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 Radio System Settings Lost or Returning to Default Values.
This service bulletin provides U157 software update information to correct customer concerns of radio Software related issues.
This service bulletin provides information to aid a dealer/customer concern of Radio Unwanted Phantom Touch or Non-Responsive to Touch After Cleaning/Disinfecting Radio Display.
This technical 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 technical bulletin provides repair information to correct a customer concern of Radio Software Version U150 Update.
This technical bulletin provides repair information to correct a customer concern of seeing SD Card Removed error message displayed in the Driver Information Center (DIC).
Plus 4 older ones not listed here.
Engine stalls or loses power while driving 4 bulletins · 24 complaints
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.
This service bulletin advises the tech that the rotational Clicking Noise Heard After Engine Shut Down may be normal characteristics of the vehicle.
2 more on this problem
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 Preliminary information communicates that a rotational clicking noise heard after engine shut down is a design characteristic and no repairs should be attempted.
Battery dies or the car will not start 8 bulletins · 13 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.
6 more on this problem
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.
This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to multiple DTC?s set after a battery discharge, jump start and/or battery replacement.
This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to multiple DTC's set after a battery discharge, jump start and/or battery replacement.
Customer Satisfaction Program - Certain vehicles, equipped with 4 Cyl gas engines, may have incorrect instructions in the owner?s manual for Dinghy and Dolly Towing.
Brakes grind, pulse or wear early 4 bulletins · 11 complaints
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 ...
This service bulletin provides information for tire pressure monitoring (TPM) system concerns.
2 more on this problem
This technical bulletin provides repair information to correct a customer concern of Loss of Brake Assist, Various Messages Displayed in Driver Information Center (DIC), Brake Pedal Travel and Apply May Feel Different, One or More of the Following DTCs May be ...
This technical bulletin provides repair information to correct a customer concern of Loss of Brake Assist, Various Messages Displayed in DIC, Brake Pedal Travel and Apply May Feel Different, DTC C0024 Set.
Complaints filed by year
84 complaints came in 2025. 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 2020 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 Buick Enclave, Cadillac XT4, XT5, Escalade, Escalade ESV, Chevrolet Suburban, Tahoe, Traverse, GMC Yukon, Yukon XL, 2018-2021 Chevrolet Express, GMC Savana, 2019-2020 Chevrolet Blazer, Silverado 1500, GMC Acadia, Sierra 1500, and certain Continental tires sold to the aftermarket for various model year 2018-2021 vehicles. The affected tires were cured for too long during production.
Risk and remedy
Remedy: GM will notify owners, and dealers will inspect the tires, replacing them as necessary, free of charge. The recall began March 22, 2021. Owners may contact GMC customer service at 1-888-988-7267, Buick customer service at 1-866-608-8080, Chevrolet customer service at 1-800-222-1020 or Cadillac customer service at 1-800-458-8006. GM's number for this recall is N212329050.
General Motors LLC (GM) is recalling certain 2018-2019 Chevrolet Cruze and Buick LaCrosse, 2018-2020 Chevrolet Equinox, Chevrolet Traverse and GMC Terrain, 2018 Chevrolet Malibu, 2019-2020 Buick Encore, Buick Enclave, Cadillac XT4, Chevrolet Blazer and GMC Acadia, and 2020 Cadillac XT6 vehicles. The start/stop accumulator endcap may have missing bolts.
Risk and remedy
Remedy: GM will notify owners, and dealers will inspect the start-stop transmission accumulator and replace it if any bolts are missing, free of charge. The recall began December 15, 2020. Owners may contact GMC customer service at 1-888-988-7267, Buick Customer service at 1-866-608-8080, Chevrolet customer service at 1-800-222-1020 or Cadillac customer service at 1-800-458-8006. GM's number for this recall is N202313440.
General Motors, LLC. (GM) is recalling certain 2020 Buick Enclave, Cadillac XT5 and XT6, Chevrolet Blazer, Silverado 1500, 2500 and 3500 and Traverse and GMC Acadia and Sierra 1500, 2500 and 3500 vehicles. The diffuser component of the Roof-Rail Air Bag (RRAB) inflator may not have been properly crimped to the inflator and could separate from the inflator during air bag deployment.
Risk and remedy
Remedy: GM will notify owners, and dealers will replace the suspect RRAB modules, free of charge. The recall began September 3, 2020. Owners may contact Chevrolet customer service at 1-800-630-2438, Cadillac customer service at 1-800-333-4223, or Buick customer service at 1-800-521-7300. GM's number for this recall is N202305380.
All 3 recalls on the 2020 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 2020 Chevrolet Blazer?
Overheating, with 48 of the 219 complaints. Owners who gave a mileage for it put the median at about 55,000 miles.
At what mileage do 2020 Chevrolet Blazer problems start?
Of the 57 complaints that give a mileage, a quarter came by about 23,000 miles and half by about 54,000.
Is the 2020 Chevrolet Blazer better or worse than the 2019 and 2021?
Counted per year on the road, the 2020 has more complaints than both the 2019 and the 2021: 31 a year against 23 and 22.
How many 2020 Chevrolet Blazer complaints involve a crash, fire or injury?
7 of them (3%). The typical vehicle on this site is at 6%.
Is there a recall for overheating on the 2020 Chevrolet Blazer?
No recall on file for the 2020 Chevrolet Blazer is on the same system as overheating. Another recall may still cover your car, so check its VIN at nhtsa.gov/recalls.