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What 144 owners told NHTSA about the 2021 GMC Acadia

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (144)Crash / fire / injury (7)Electrical system (37)Engine (29)Fuel system (26)Brakes (17)Transmission & drivetrain (17)Steering (15)Airbags (8)Backup camera & sensors (7)Speed control (7)Driver assistance (6)

1 of 144 complaints match · Transmission & drivetrain · crash/fire/injury only · clear filters

Dec 11, 2024Transmission & drivetrainElectrical systemEngineCrash

While driving vehicle stalled multiple times in the middle of the road, with service transmission and engine light coming on, causing unsafe conditions, causing accident and leaving passengers stranded. Battery being drained and needing to be replaced multiple times within 2 years. Vehicle stopping and shutting off on the highway causing dangerous driving conditions!! Radio and lights flickering, with radio freezing and shutting off. Electrical system not working properly and overheating!

NHTSA ODI 11630080

Working with the data? Download all 144 complaints as CSV · fetched from NHTSA July 10, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2021 GMC Acadia verdict →