Problems · NHTSA complaints

2020 Chevrolet Blazer problems

Owners filed 224 complaints about the 2020 Chevrolet Blazer with NHTSA between Aug 2020 and Oct 2026. The most-cited component is electrical system (78).

Complaints
224
Filed with NHTSA
Crashes
5
Reported by owners
Fires
1
Reported by owners
Injuries
7
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Electrical system78
  2. Power train75
  3. Engine71
  4. Steering43
  5. Service brakes10
  6. Lane departure5
  7. Vehicle speed control4
  8. Fuel/propulsion system4
  9. Suspension4
  10. Engine and engine cooling3
  11. Air bags3
  12. Forward collision avoidance3
  13. Wheels3
  14. Tires3

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Nov 10, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
20202
20217
20229
202313
202452
202584
202657

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Electrical system

78 reports1 fire
“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”
Owner complaint to NHTSAFiled Oct 22, 2026Electrical systemODI 11772935

Power train

75 reports1 related recall
“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 running continuously at high speed, the AC stopped blowing cold air and is warm air, the steering assist reduced came on and my chevy app notified me that I have an engine cooling system malfunction and to service now. It's showing a P0128 code when I had it checked. After doing some research, I discovered GM issued a thermostat special coverage program for certain vehicles 2021-and newer models. Mine isn't part of it because of the year and isn't covered by the power train warranty for the same reason even though they all have the same engine. I only have 54,000 miles! I'm very concerned over the steering assist being reduced! What if the steering goes out while I'm driving? I have my grandchildren all the time. I need my car! There are several other complaints on here for the same vehicle and the same problem! Why…”
Owner complaint to NHTSAFiled Oct 22, 2026Steering, Power train, EngineODI 11773043

Engine

71 reports1 crash
“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. This was identified as faulty by GM and they have issued a special service bulletin that they will repair it up to a 150,000 miles or 15 years or reimburse customers up to $1200 on 2021 models. The 2020 models use the same engine and parts but they refuse to include them which is an unfair exclusion since they admitted to a faulty part. 2020 should be included with the same 150,000 miles and 15 year coverage or reimbursement.”
Owner complaint to NHTSAFiled Oct 8, 2026Steering, Power train, EngineODI 11769932

Steering

43 reports
“I was driving and steering reduced drive with caution notification and brake assist notification came on and then engine light and the temp gage went to cold and stayed there. My steering stiffened up making it hard to steer. This is a known problem with the Chevy blazers and it had to do with the thermostat needing replaced.”
Owner complaint to NHTSAFiled Jul 10, 2026Steering, Service brakes, EngineODI 11749661

Service brakes

10 reports1 crash
“Last year I was heading to heading to [XXX] in XXX when I pushed on the brakes on my 2020 Chevy blazer my brakes were working but the steering wheel was shaking weird like I was hard on the brakes but I was tapping them slowly earlier this year right before I had transmission flush at fox Chevy in Caledonia I noticed before two weeks of bringing it in I was near a traffic light slowing down it went hard shift down and when I was not moving in notice it jerked forward when at idle and the light like it was rear ended I feel like this is a safety concern of that happening after the transmission flush for two months after doing the acceleration is slipping I feel like there should be a recall for torque and transmission recalls for the 2020 Chevy blazers I really love this blazer owned for 4 years now I feel like it would be a safety for the public and nationwide”
Owner complaint to NHTSAFiled Jul 12, 2026Power train, Service brakesODI 11749874

Lane departure

5 reports
“The contact owns a 2020 Chevrolet Blazer. The contact stated that while driving approximately 70 MPH, the message, "Steering Assist Reduced - Drive Carefully” was displayed. The contact stated that the A/C shut off and the windshield defroster failed after the message was displayed. The vehicle was taken to the dealer, and the contact was informed that the repair was not covered. The manufacturer was informed of the failure and confirmed that the vehicle was not included in the “Special Coverage" for the repair. The contact was referred to the NHTSA Hotline to report the failure. The failure mileage was approximately 65,000.”
Owner complaint to NHTSAFiled Jun 23, 2026Electrical system, Lane departureODI 11745865
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 10, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.