NHTSA Complaint #11648616 — 2020 CHEVROLET BLAZER

ENGINE issue reported to NHTSA

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Complaint Details

ODI Number	11648616
Vehicle	2020 CHEVROLET BLAZER
Component	ENGINE
Date of Incident	February 25, 2025
Date Filed	March 16, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	OK

Consumer Description

Chronic code P0128, causes cooling fans to go on high, AC doesn't work and steering assist reduced. GM calls for the thermostat to be replaced, at the cost of $1400 at my local Chevrolet dealer. Worked fine for two months then code and issues come back. Online forums are full of people with the same problem. Clearly there is an issue with these vehicles with the 3.6l motor.

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Recent Complaints for the 2020 CHEVROLET BLAZER

#11718743 — POWER TRAIN — February 18, 2026 — The contact owns a 2020 Chevrolet Blazer. The contact stated that while driving at an undisclosed speed, the check en...

#11717071 — UNKNOWN OR OTHER — February 10, 2026 — Driving down the road at 50 mpg when to car just shut off had a hard time getting it off the road and did still was a...

#11715931 — ELECTRICAL SYSTEM — February 5, 2026 — Engine showing PO128 code. Steering Assist System reduced power. Engine fan constantly running. Engine temp on dash i...

#11715931 — STEERING — February 5, 2026 — Engine showing PO128 code. Steering Assist System reduced power. Engine fan constantly running. Engine temp on dash i...

#11715555 — ELECTRICAL SYSTEM — February 4, 2026 — I received a check engine light which i took to Bell tire for diagnosis. Here is there diagnosis Comments: The P01F...