2021 GMC Acadia Lane departure Problems
- Complaints
- 4about this part
- Share
- 3%of 155 total for the year
- Median mileage
- 17,700miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the lane departure of the 2021 GMC Acadia, 3% of the 155 complaints for this model year. Where a mileage was given, the median is 17,700 miles.
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.
“My thermostat failed in my car, my temp goes out and reads at 0° then my steering assist says it’s reduced. There are many forums online regarding this issue.”
NHTSA complaint #11740094, filed 2026-05“Vehicle gives, “Driver assist reduced Drive with care” warning randomly. Lane change will no longer work and engine light will come on. Problem is sporadic and does not stay active. Engine light will shut off after a day. Once vehicle is shut off cooling fan runs extremely loud and for a long period of time draining battery.”
NHTSA complaint #11650976, filed 2025-03“Cars is not keeping track of temperature showing engine is cold after 30 minutes of driving, fan runs for extended periods of time after shutting off, check engine light comes on, steering assist alert comes in screen. All of this happens in a cycle. To stop it the battery has to be unplugged and reconnected resetting the car and everything goes back to being fine for a short period of time.”
NHTSA complaint #11709573, filed 2026-01“The contact owns a 2021 GMC Acadia. The contact stated that the software update was performed under NHTSA Campaign Number: 22V709000 (Back Over Prevention). After the software was updated, the Lane Departure Assist system failed and was no longer alerting the driver when the vehicle was drifting into the other lane. The vehicle was taken back to the dealer who completed the software update however, the cause of the failure was undetermined. The vehicle had not been repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 17,700.”
NHTSA complaint #11546941, filed 2023-09, 17,700 milesLane departure: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 1 | 10% |
| 2025 | 2 | 3% |
| 2024 | 1 | 2% |
| 2023 | 1 | 2% |
| 2022 | 5 | 10% |
| 2021 | 4 | 3% |
| 2020 | 3 | 3% |
| 2019 | 6 | 2% |
| 2018 | 6 | 2% |
| 2017 | 17 | 2% |
| 2016 | 9 | 4% |
| 2015 | 7 | 3% |
| 2014 | 6 | 1% |
| 2013 | 4 | 3% |
Other parts of the 2021 GMC Acadia
39 complaintsEngine
30 complaintsFuel system
30 complaintsOther or unknown
22 complaintsBrakes
19 complaintsSteering
18 complaintsTransmission and drivetrain
17 complaintsAir bags
10 complaintsBack-over prevention (rear camera)
7 complaintsForward collision avoidance
7 complaintsVehicle speed control
7 complaintsEngine cooling
3 complaints
← All problems reported for the 2021 GMC Acadia
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 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