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Other or unknownPart report

2021 GMC Acadia Other or unknown Problems

Complaints
22about this part
Share
14%of 155 total for the year
Median mileage
—not reported
Trend
RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.

NHTSA recorded 22 complaints about the other or unknown of the 2021 GMC Acadia, 14% of the 155 complaints for this model year. 1 of these say a crash was involved, according to the filers.

Example complaints

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

“On numerous occasions the key fob is not detected and locked out of vehicle. Key fob notice on panel saying it’s not detected while driving. Took it to Jim Causley GMC dealer several times and then they kept vehicle for a week unable to duplicate and sent me on my way. This is still happening with no help.”

NHTSA complaint #11656763, filed 2025-04

“Recently took vehicle for alignment for a pull to the right. After 3 alignments at the dealership I was told the rack and pinion gear sensor shorted out causing the vehicle to pull to the right. Also the exhaust has a rattle in the resonator confirmed by 2 sources. I asked the dealer to fix years ago under bumper to bumper and tsb PIT5863. I was told not enough techs and not enough time so now the warranty is expired and the issue isn't fixed.”

NHTSA complaint #11696423, filed 2025-10

“I opened my power lift gate to load groceries in the trunk. It opened without issue. As I loaded the groceries the lift gate came crashing down on my head. This happened in the festival foods parking lot around 5:05 pm today (7/16/23). Once I moved out from under it I saw the left arm was popped off. I popped it back in , there is a metal piece that was messed up. It came/ happened out of nowhere. I’ve never had an issue with it.”

NHTSA complaint #11532590, filed 2023-07

“My car suddenly out of the blue started overheating. By the time I could get stopped safely and turn the car off the engine fan kept running to try to cool it down. I’ve never had any issues with my car. It only has 47,000 miles on it. I now have to have it towed to a mechanic shop to get diagnosed, but I’m hearing that it’s probably a thermostat and that the GMC Acadia’s are famous for that being a problem. I’m not sure why GMC would not do a recall on this part! this is an extremely expensive fix.”

NHTSA complaint #11708654, filed 2026-01

“The magnetic chest clip does NOT latch. It can easily be pulled apart by hand. It compromises my child’s safety tremendously by allowing the harness straps to slip off of her shoulders in event of a crash leading to a projected infant. Upon doing further research and posting in my moms group on facebook i’ve found countless reports dating back to 2023 where this magnetic chest clip is a terrible design and idea. Many consumers reported to the manufacturer and received multiple replacements and regretted buying the $360+ car seat. …”

NHTSA complaint #11771605, filed 2026-10

Related service bulletins

Other or unknown: other model years

YearComplaintsShare of year
2026440%
20251319%
202423%
20231122%
20221121%
20212214%
20201514%
201912031%
201811830%
201717024%
2016229%
2015239%
2014317%
20132216%
20124214%
2011166%
2010124%
2009185%
2008668%
2007194%

Other parts of the 2021 GMC Acadia

Electrical system
39 complaints
Engine
30 complaints
Fuel system
30 complaints
Brakes
19 complaints
Steering
18 complaints
Transmission and drivetrain
17 complaints
Air bags
10 complaints
Back-over prevention (rear camera)
7 complaints
Forward collision avoidance
7 complaints
Vehicle speed control
7 complaints
Lane departure
4 complaints
Engine 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 27, 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