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2021 GMC Acadia problems: engine and transmission complaints and recalls
47% of relevant owner complaints filed with NHTSA on the 2021 GMC Acadia are about the engine, transmission or fuel system. That is a model-level pattern, not bad luck.
Worse than 59% of the 1,790 model years we track (2010–2023).
Excludes 11 airbag, lighting and seat-belt recall complaints that would otherwise mask the signal (unadjusted: 44%).
Does the 2021 GMC Acadia have engine problems?
Owner complaints say yes, as a model-year pattern. 65 of 138 relevant complaints filed with NHTSA about the 2021 GMC Acadia concern the engine, transmission or fuel system (47%), and the largest group is filed under engine (29). For comparison, the 2020 scores 49% and the 2022 scores 53%. On a test drive, check for stalling, loss of power, rough idle, oil consumption or a check-engine light. This describes the model year, not any one car: a well-maintained or already-repaired example can be fine, and a clean model year can still have a bad car in it.
Complaints by component
The years either side
Manufacturers fix things mid-generation. A bad year next to a clean one is common; the fix usually arrived in between.
How the 2021 compares with other GMC Acadia years
Of the 14 GMC Acadia years with enough complaints to score, the 2021 is the 7th-worst on engine and transmission share (47%). The worst is the 2023 (56%), the best the 2016 (33%). By volume, the 2021 drew 149 complaints (65 drivetrain), against 105 for the 2020 and 49 for the 2022.
GMC Acadia years to avoid and best years →
2010 Acadia problems · 2011 Acadia problems · 2012 Acadia problems · 2013 Acadia problems · 2014 Acadia problems · 2015 Acadia problems · 2016 Acadia problems · 2017 Acadia problems · 2018 Acadia problems · 2019 Acadia problems · 2020 Acadia problems · 2021 · 2022 Acadia problems · 2023 Acadia problems
The rest of the picture on the 2021 GMC Acadia
- The mileage where it happens. When owners of the 2021 GMC Acadia said the problem showed up, and the range most of them fell in.
- What the repair costs. Typical engine repair ranges, to price into your offer.
- Cleaner alternatives. Similar cars and nearby years with a better record.
- Up to 15 owner reports, with the ones about your car's own engine first.
- What to ask the seller and what to check on the test drive, for this car.
- Two cars side by side, if you are deciding between them.
What one owner reported
One of 65 drivetrain complaints. The full report shows up to 15, with quotes about the engine in the car you are looking at first.
2021 GMC Acadia fuel system recalls
Yes. NHTSA lists 1 recall campaign on the 2021 GMC Acadia involving the engine, transmission or fuel system, out of 2 in total. A recall is the manufacturer admitting a defect and paying to fix it; whether a specific car still has one open depends on its VIN, which the full report checks. The owner complaints above are a separate record and often point at problems that never became a recall.
General Motors, LLC. (GM) is recalling certain 2021 Cadillac XT5, XT6, and GMC Acadia vehicles. The fuel supply lines may be improperly attached and seated.
Risk: Improperly attached and seated fuel supply lines may loosen or separate, causing a fuel leak and increasing the risk of a fire.
Fix: Dealers will inspect and replace fuel supply lines as necessary, free of charge. Owner notification letters were mailed on July 1, 2021. Owners may contact Cadillac customer service at 1-800-458-8006 and GMC customer…
1 other recall on this model year (airbags, lighting, brakes and the rest)
Source: NHTSA recall campaigns filed against this year, make and model. Checked October 3, 2026.
Checking one particular 2021 GMC Acadia? This page is about the model year. Accidents, title brands and odometer records belong to the individual car, and that is what a vehicle history report covers.
Get a history report from EpicVIN Before you pay: EpicVIN’s $1 offer is a 3-day trial (up to 5 reports) that renews at $49.99 a month unless you cancel. Other plans are listed under “View all our packages” at checkout. We may earn a commission if you buy through this link. It does not change what this page reports.Questions people ask about the 2021 GMC Acadia
Does the 2021 GMC Acadia have engine problems?
Owner complaints say yes, as a model-year pattern. 65 of 138 relevant complaints filed with NHTSA about the 2021 GMC Acadia concern the engine, transmission or fuel system (47%). Before buying one, have an independent mechanic check the engine and ask the seller whether it has been repaired or replaced.
What is the most common problem with the 2021 GMC Acadia?
Going by NHTSA owner complaints, the most common problem filed against the 2021 GMC Acadia is electrical system: 38 of 149 complaints (26%) name it, followed by engine (29) and fuel/propulsion system (24). A complaint can name more than one component, so these overlap. Engine, transmission and fuel-system complaints together make up 47% of the relevant total.
Is the 2021 GMC Acadia reliable?
On the engine and transmission, owner complaints point to a weak spot: 47% of relevant complaints filed with NHTSA concern the drivetrain (high signal). That is worse than 59% of the 1,790 model years we track. Among the 14 GMC Acadia years we score, it ranks 7th-worst. Complaint data describes the model year, not one car, and it says nothing about trim, paint or electronics outside the drivetrain; an independent inspection still decides it.
Are there engine or transmission recalls on the 2021 GMC Acadia?
Yes. NHTSA lists 1 recall campaign on the 2021 GMC Acadia involving the engine, transmission or fuel system, out of 2 in total: 21V422000 (fuel system, gasoline: delivery: hoses, lines/piping, and fittings). Whether a specific car still has one open depends on its VIN.
Which GMC Acadia years are better?
Among the GMC Acadia years we track, the 2016 (33%), the 2015 (34%) and the 2011 (37%) have a lower engine and transmission complaint share than the 2021 (47%). Manufacturers fix things mid-generation, so the year before or after can be a different car. Every year side by side: https://thelanecheck.com/cars/gmc-acadia
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Check a VINExperimental model-level information. This is not a vehicle inspection, vehicle-history report, financial advice or purchase recommendation. It describes patterns across a model year, not the condition of any individual vehicle.