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ProblemsByVinFile / 2021-GMC-ACADIANHTSA data synced 1 day ago
GMC
2021 GMC Acadia problems
The 2021 GMC Acadia has 145 NHTSA owner complaints and 2 active recall campaigns on file. Here's the breakdown — what's serious, what's noise, and what a working mechanic would actually do about it.
The 2021 GMC Acadia has 145 NHTSA owner complaints and 2 recalls on file (U.S. federal records, as of August 2026). The most-reported system is electrical at 28 complaints, typically surfacing around 31,400 miles (~$850 to repair). Source: NHTSA Office of Defects Investigation.
Solid reliability overall. Common issues are concentrated in a few systems.
0
Critical
2
Severe
0
Moderate
Should you avoid this 2021 Acadia?
Acceptable — with caveats
Worth owning if you verify the specific issues below before you buy.
Electrical system: 28 complaints, classified severe
Reliability score 7.2/10 — around the segment average
2 recall campaigns on file
Our read of the federal NHTSA complaint and recall record for this exact year and model —
not a substitute for a pre-purchase inspection. How we score.
NHTSA crash-test safety ratings
5 / 5 overall
Overall★★★★★5/5
Frontal crash★★★★★5/5
Side crash★★★★★5/5
Rollover★★★★★4/5
Driver-assist features on the tested model:
Electronic stability control: Standard · Forward collision warning: Optional · Lane departure warning: Optional
Source: NHTSA New Car Assessment Program — tested configuration: 2021 GMC Acadia SUV AWD. Stars rate crash protection in NHTSA's tests, not overall reliability — see the owner-complaint data below for what actually goes wrong.
Buying a used 2021 GMC Acadia? Check these first
Here's what this model is known to do — so you can inspect for it, price it in, or
make the seller fix it before you sign.
What to inspect on this specific car
electrical — 28 owner reports
· tends to show around 31,400 mi · ~$850 to fix
engine — 17 owner reports
· tends to show around 41,544 mi · ~$3,100 to fix
brakes — 15 owner reports
· tends to show around 26,000 mi · ~$450 to fix
powertrain — 15 owner reports
· tends to show around 4,082 mi · ~$2,500 to fix
⚠ The one to take seriously: electrical is flagged
severe on this model
, showing up around 31,400 mi.
Inspect it closely on a test drive.
Recalls to confirm are done
Run the VIN from the listing — 2 active recalls on this model. Recall repairs are always free.
Verdict for buyers: 7.2/10 model. The priciest documented failure is
engine (~$3,100) — get the
seller's service records for it or inspect closely. Otherwise an average-risk used buy at a fair price.
We tell you what this model is known for and what to inspect — a vehicle-history report
tells you what this exact car has been through. Smart buyers get both.
A noise, a warning light, a repair quote, "should I buy this?" — get an answer grounded in
this vehicle's actual NHTSA record, not generic advice.
Dash light, leak, worn part — snap it and we'll read it against this car's record.
Photo attached — type a question or just hit Ask.
Answers use this vehicle's NHTSA complaint & recall record — owner-reported and unverified, not a diagnosis. Verify anything safety-critical with a mechanic.
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What owners are saying
recent NHTSA-filed complaints · verbatim
2021 Acadia· brakes
Taken from service report; customer states brake pedal some times sinks to the floor and brake fluid on driveway. Tech performed brake fluid check and found that the brake fluid leak is coming from the left front and right front caliper hose, caliper hose has rub marking, making…
The contact owns a 2021 GMC Acadia. The contact stated that while driving approximately 30-60 MPH, the vehicle started shuddering inadvertently. There were no warning lights illuminated. The contact stated that he continued to drive the vehicle. The contact stated that the…
Car steers to left,volume does not work after a connected call while driving,screen blacks out and noise coming out of left driver door panel while car is off,also message that sd card was removed no apps working
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…
Had a problem with your 2021 GMC Acadia?
File a complaint with NHTSA → It's free and official — owner filings are what build the federal safety record behind this page.
Estimate your repair exposure
Drag to your current mileage. Numbers are derived from this vehicle's complaint history.
General Motors, LLC (GM) is recalling certain 2020-2021 Cadillac XT5, XT6, and GMC Acadia vehicles equipped with the optional Surround Vision feature
An inoperative rearview camera can reduce the driver's rear visibility, increasing the risk of a crash.
Fix: Dealers will replace the coaxial cables, free of charge. Owner notification letters were mailed January 18, 2023. Owners may contact Cadillac customer service at 1-800-458-8006 or GMC customer service at 1-800-462-8782. GM's number for this recall is N222378380.
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 service at 1-800-462-8782. GM's number for this recall is N212335590.
Common questions
Is the 2021 GMC Acadia reliable?
Mostly yes. With a reliability score of 7.2 out of 10 based on 145 owner complaints filed with NHTSA, the 2021 GMC Acadia is generally a sound vehicle. The areas to watch are listed in the top problem section above — most are budget items, not deal-breakers.
Should you avoid the 2021 GMC Acadia?
The 2021 GMC Acadia is acceptable, with specific caveats. Worth owning if you verify the specific issues below before you buy. The record behind that call: Electrical system: 28 complaints, classified severe; Reliability score 7.2/10 — around the segment average; 2 recall campaigns on file. This is our read of the federal complaint and recall data — not a substitute for a pre-purchase inspection.
What should I check before buying a used 2021 GMC Acadia?
Inspect the electrical first — it's the most-reported issue on this model, with 28 owner complaints filed. Typical failure occurs around 31,400 miles. Average repair cost runs about $850 at an independent shop. Also confirm any open recalls have been completed by running the VIN, and ask for service records covering the problem areas listed above.
Is the 2021 GMC Acadia a good used car to buy?
It scores 7.2 out of 10 on our NHTSA-based read of 145 owner complaints. The main thing to watch is electrical. Typical failure occurs around 31,400 miles. Priced fairly and clean on inspection, it's a reasonable used buy. Our data covers what this model is known for — pair it with a vehicle-history report on the VIN to see what that specific car has been through.
What's the most common problem on the 2021 GMC Acadia?
Based on NHTSA records, the most-reported issue is electrical, with 28 complaints filed. Typical failure occurs around 31,400 miles. Average repair cost runs about $850 at an independent shop.
What's the most expensive thing that goes wrong?
The electrical is one of the costlier repair items. Average repair cost runs about $850 at an independent shop. Typical failure occurs around 31,400 miles. Catching early warning signs can sometimes extend life by 20–30,000 miles.
How do I check if my GMC Acadia has open recalls?
Paste your VIN into the decoder at the top of this page. We pull live from NHTSA, so you'll see exactly which campaigns apply to your vehicle and whether the dealer has logged the fix. Recall repairs are always free regardless of mileage or warranty status.
Is an extended warranty worth it on a 2021 GMC Acadia?
Math is straightforward: a quality service contract runs $1,800–3,500 over 3 years. With 145 complaints on file and the costliest repair averaging $850, one major failure more than pays for it. The catch is reading the contract — many providers exclude wear items and require pre-authorization, so cheaper plans are not always better value.
Recall and complaint data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database, last synced 1 day ago. Verify the raw federal record at
nhtsa.gov/vehicle/2021/GMC/Acadia.
Editorial commentary written by ProblemsByVin contributors and reviewed by ASE-certified mechanics.
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