2020 Chevrolet Blazer Engine Problems
Owners have filed 70 complaints with NHTSA about engine problems on the 2020 Chevrolet Blazer, 32% of all complaints for this model year. Half of the reports with a mileage happened before 15,000 miles. The words owners use most often: “assist reduced” (30% of reports).
- 70engine complaints
- 15,000median miles at failure
- 1mention a crash
- 1mention an injury
- 0related recalls
- 32%of reports with a speed happened at 50+ mph
What owners describe
Phrases that appear unusually often in these complaints compared with complaints about other cars.
- Assist reduced: mentioned in 21 of 70 complaints (30%)
- Temperature gauge: mentioned in 12 of 70 complaints (17%)
- Sensor thermostat: mentioned in 6 of 70 complaints (9%)
- Stuck cold: mentioned in 5 of 70 complaints (7%)
At what mileage do engine problems happen?
Based on 5 complaints that reported the odometer reading.
How serious are the reports?
Of 70 complaints, 1 mention a crash, 1 an injury.
Chevrolet Blazer engine complaints by model year
| Model year | Engine complaints | Share of that year | Median miles |
|---|---|---|---|
| 2025 Blazer | 3 | 9% | — |
| 2024 Blazer | 7 | 14% | — |
| 2023 Blazer | 12 | 28% | 53,550 |
| 2022 Blazer | 14 | 26% | 121,000 |
| 2021 Blazer | 42 | 31% | 32,000 |
| 2020 Blazer | 70 | 32% | 15,000 |
| 2019 Blazer | 40 | 21% | 1,905 |
| 2006 Blazer | 2 | 11% | 109,000 |
| 2002 Blazer | 3 | 1% | 145,000 |
| 2000 Blazer | 1 | 0% | 143,118 |
| 1999 Blazer | 2 | 0% | 135,284 |
| 1998 Blazer | 2 | 0% | 140,000 |
| 1996 Blazer | 1 | 0% | 147,000 |
| 1995 Blazer | 2 | 0% | 188,684 |
When owners reported it
Related recalls (0)
No safety recall lists engine for the 2020 Chevrolet Blazer. A pattern of complaints does not always lead to a recall.
What owners report
Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.
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…
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…
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…
Frequently asked questions
Do all 2020 Chevrolet Blazers have engine problems?
No. NHTSA has 70 owner complaints about engine for the 2020 Chevrolet Blazer (32% of the 221 complaints for this model year). Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the 2020 Chevrolet Blazer engine?
No recall currently lists engine for this vehicle.
At what mileage do engine problems start?
The median reported mileage is 15,000 miles: half of the reports with a mileage came before that.
What do owners say about engine problems on the 2020 Chevrolet Blazer?
The most frequent phrase is “assist reduced”, in 21 of 70 complaints, followed by “temperature gauge” (12).
Other 2020 Chevrolet Blazer problems
See all 2020 Chevrolet Blazer problems or engine problems across all Blazer years.