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Lane departurePart report

2021 Chevrolet Blazer Lane departure Problems

Complaints
3about this part
Share
2%of 141 total for the year
Median mileage
—not reported
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 3 complaints about the lane departure of the 2021 Chevrolet Blazer, 2% of the 141 complaints for this model year.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“The thermometer and thermometer sensor are glitching . The engine temp needle will not rise at all, the engine fan will run the whole time driving and then when it is turned off will run for 10 min . Right before this happens a notice shows the guided steering is being limited. I disconnected the battery and it reset , I drove and there were no issues , next time I started my car the engine temp needle stayed down and the van started again. This car has 36k miles on it. I just bought it 2 days before it started happening”

NHTSA complaint #11745573, filed 2026-06

“Driver Assisted Reduced Use Drive With Care Message comes on when it is over 70 degrees outside. The temperature gage reads zero, A/C does not work, when the car is turned off the fan runs on high for an extended period of time. Showing code P0128 Used car purchase, came on 3 days after receiving vehicle from the dealership. Reset the code came on again 2.5 weeks later (5/3/2025) when the outside temperature was in the 70's”

NHTSA complaint #11658644, filed 2025-05

“The radio and all the sound notifications such as turn signals, emergency flashers, crash avoidance, cross traffic, lane departure, and the use of the emergency OnStar system do not work. this has been addressed in GM service information #PIT5971B: Loss OF Audio and OnStar LED is Red - (Apr 3, 2023) GM appears to be addressing this as an inconvenience of not having the entertainment of the radio and not the safety features associated with it. This also includes the use of hands-free cell phone.”

NHTSA complaint #11529702, filed 2023-06

Lane departure: other model years

YearComplaintsShare of year
202513%
202436%
202325%
202132%
202052%
201942%

Other parts of the 2021 Chevrolet Blazer

Engine
42 complaints
Electrical system
40 complaints
Other or unknown
24 complaints
Brakes
21 complaints
Transmission and drivetrain
19 complaints
Fuel system
18 complaints
Steering
15 complaints
Forward collision avoidance
8 complaints
Tires
5 complaints
Suspension
4 complaints
Engine cooling
3 complaints
Air bags
2 complaints

← All problems reported for the 2021 Chevrolet Blazer

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology