2020 Chevrolet Blazer problems, complaints & recalls
Most-reported problem areas: Power Train (48) · Steering (34) · Engine (32)
🧭 Reliability snapshot
Compared against other Chevrolet Blazer model years — complaint volume vs the model's median year, recalls and severity. How we score →
🛣️ Complaints by mileage
32 NHTSA complaints that reported an odometer reading.
Safety recalls (3)
Tires 2021-02-25 · campaign 21V115000 · 33,838 vehicles
Defect: 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: Over cured tires may develop a break in the sidewall resulting in sudden air loss or a belt edge separation which could lead to a tread/belt loss. Either condition can cause a loss of vehicle control, increasing the risk of a crash.
Fix: 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.
Power Train:automatic Transmission 2020-10-29 · campaign 20V668000 · 194,105 vehicles
Defect: 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: Missing bolts on the start-stop accumulator endcap could result in a transmission oil leak and may progress to a loss of propulsion, increasing the risk of a crash. A transmission fluid leak in the presence of an ignition source may increase the risk of fire.
Fix: 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.
Air Bags:side/Window:curtain:inflator 2020-07-30 · campaign 20V446000 · 769 vehicles
Defect: 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: If the diffuser separates from the inflator during deployment, RRAB performance may be degraded, increasing the risk of injury in a crash.
Fix: 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.
Service bulletins (856)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Unknown Or Other 2026-10-26 · GM Update N25-250552 · Over The Air
• improvements to onstar functionality.
Unknown Or Other 2026-09-26 · PIT5698F · Service Bulletin/Repair Instructions
this pi provides diagnostics tips on how the lin bus works and how to diagnosis it.
Unknown Or Other 2026-09-04 · PIP4902W · Service Bulletin/Repair Instructions
this preliminary information advises a dealer on how to email gds2 session logs into technical assistance.
Unknown Or Other 2026-07-21 · PIT5099J · Service Bulletin/Repair Instructions
pi to help diagnose a/c concern
Unknown Or Other 2026-04-01 · PIT3271Q · Service Bulletin/Repair Instructions
this preliminary information communicates information about how to determine if a wheel and tires size change is available.
Unknown Or Other 2026-03-09 · PIP6104 · Service Bulletin/Repair Instructions
this preliminary information communicates the steps on how to save a gds2 session log and upload to a technical assistance case in cx connect.
Showing the 6 most recent of 856 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-10-22 · Electrical System“warning on console “steering assist is reduced drive with care” and radiator fan turns on right away at full speed.. this has been reported in similar models and years.. but does not include this particular vehicle year and vin…”
2026-10-22 · Steering“2020 chevy blazer lt 3.6 l v6 i'm filing this complaint regarding multiple concerning mechanical and safety related issues with my 2020 chevy blazer lt that i purchased brand new and currently have 54,224 miles . without warning, my vehicle developed several problems simultaneously. the check engine light came on, the engine cooling fan started r…”
2026-10-20 · Electrical System · 🔥 fire“my 2020 chevrolet blazer experienced severe mechanical problems, including stuttering, loss of power, and the engine shutting off unexpectedly while i was driving. the vehicle subsequently would not operate normally. on february 25, 2026, rick hendrick chevrolet duluth performed a diagnostic inspection and recommended nearly $20,000 in repairs, in…”
2026-10-08 · Steering“the thermostat is malfunctioning along with engine temperature coolant sensor. this causes the temperature gauge on the dashboard to be completely disabled and not moving off cold, it disables the air conditioner, makes the engine cooling fan to run extremely high nonstop, and places the vehicle into an unpredictable limp mode or fail safe mode. …”
2026-10-01 · Engine“the radiator and thermostat on my 2020 blazer had to be replaced at less than 35,000 miles. it was out of warranty and the chevy dealer charged me $3,500 to replace them. internet sources state that this is a common problem with this car. i complained to chevy corporate and they refunded $1,000. i do not feel this was a fair settlement due to the …”
2026-09-21 · Steering“power steering went out while driving making it impossible to steer.…”
2026-09-19 · Unknown Or Other“this happened back in may and the dealership couldn’t find anything wrong and it happened again today. i am driving and the car will shut off. a message pops up saying shift to neutral and press start again. it’s very dangerous and frustrating. …”
2026-09-14 · Electrical System“the contact owns a 2020 chevrolet blazer. the contact stated that while starting the vehicle, the brake pedal became inoperable. there was no warning light illuminated. the contact stated that excessive force was needed to depress the brake pedal to engage the start/stop function to start the vehicle. the dealer was not contacted. the manufacturer …”
2026-09-14 · Engine And Engine Cooling:exhaust System:emission Control:catalytic Convertor · 119,000 mi“the contact owns a 2020 chevrolet blazer. the contact stated that while operating the vehicle, the check engine warning light intermittently illuminated, and the vehicle hesitated while accelerating. the vehicle was taken to the local dealer to be diagnosed, and the contact was informed that the catalytic converter needed to be replaced. the vehicl…”
2026-09-11 · Unknown Or Other“the screen displayed shift to park. the car wouldn’t not recognize it was in park. had to hit the shifter to get the car to recognize it was in park or it wouldn’t let you turn the car off. there was nothing other than the warning on the screen when we went to get gas and needed to turn the car off. it hasn’t been inspected by any of for this issue…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.