Known GMC problem of a coolant leak which could cause an on-highway failure.
Engine & cooling
2025 GMC Acadia Engine problems
Owners have filed 7 complaints about the 2025 GMC Acadia's engine & cooling with NHTSA - 10% of all its complaints, most recently on October 23, 2026. Stalling, loss of power, oil consumption, overheating, head gaskets, timing chains and engine failure.
- Complaints
- 7
- Recalls
- 0
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
Engine complaints
Engine cooling system malfunction, Ive had to receive maintenance on my Acadia 2025 elevation 3 times in the pass 2 months for the same issue, The coolant system. This is becoming a reoccurring issue that needs to be investigated thoroughly. Ive had to get a rental car all 3 times, and this is becoming frustrating and financially draining. My biggest concern is what is to happen once my warranty expires? guess I'll be paying a note and repair cost until a recall is opened on this issue and then will have to wait...
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for reimbursement. This is horrible to say this car was made 2 years ago. Attention is needed on this defective part. I'm so frustrated to I might just trade in this vehicle. I pay for dependability and reliability in the amount of 1300.00 monthly, but only receiving a financial headache.
The vehicle has a serious transmission/drivetrain defect that repeatedly occurs when accelerating from a complete stop, especially onto an incline. The vehicle sometimes does not respond at all when the accelerator is pressed and fails to move, even though acceleration is being requested. In one recent incident, it remained stopped for about one minute before finally responding. During these events, the vehicle jerks and shakes severely and fails to gain speed as expected. This creates a major safety risk at stop...
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signs, intersections, and uphill starts because the vehicle may not move when needed and cannot keep up with traffic. The problem has worsened, and during one of these incidents the check engine light came on. I have video evidence showing the loss of response to accelerator input, severe jerking/shaking, and the check engine light illuminating during the same event. The issue has been reported to dealers and GM customer service but has not been properly resolved.
This is ongoing from the purchase of the car. 1) Infotainment computer screen daytime illumination is so dark as to be a major safety issue as it causes too much time looking away from the road to operate the system. If you wear sunglasses you cannot see the screen at all. The dealer says nothing can be done to improve the problem. 2) Right rear tail light stopped working after 500 miles. Replacement requires dropping the rear bumper and quarter panel. The dealer actually damaged the body of the car while...
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replacing the light. Where are the days of changing out a light bulb? 3) At 1200 miles the transmission torque converter is chattering and slipping on cruise control at 50 MPH. 4) Engine noise is very loud during acceleration. Seats seem flat with no bolsters and little cushioning.
The vehicle experiences a transmission/drivetrain defect involving delayed gear engagement, hesitation, and apparent slipping. When accelerating from a complete stop (especially onto an incline) the engine RPM increases but the vehicle fails to accelerate as expected. The vehicle jerks and shakes violently and is unable to gain speed. This issue is intermittent but highly repeatable and occurs almost every time when there is a slope immediately after a stop sign. It results in loss of acceleration, violent...
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shaking, and inability to maintain or build speed, creating a serious safety risk in traffic. It first happened around 1 year (early 2026) after the new car purchase (Nov 2025). There are no warning lights or messages. The dealer claimed they were unable to reproduce the issue during a brief test drive without me present and incorrectly attributed it to a bulletin without performing a detailed diagnosis or repair or looking at the video we recorded on the issue. The issue persists and affects safe operation of the vehicle. No inspection has been done by police or insurance. In one instance, this occurred while other vehicles were approaching from behind, creating a dangerous situation where I could not accelerate to match traffic flow. This resulted in a high risk of being rear-ended due to the unexpected loss of acceleration. I am aware of other consumer reports describing similar transmission-related symptoms such as slipping, hard shifting, and hesitation in this model. Some complaints describe transmission issues occurring at low mileage without warning lights.
Unknown. Brakes still squeaking after getting them changed with the bulletin notice. Engine surges and idles rough- dealership could not diagnose. Not accelerating randomly, pedal goes in and it does not engage. Gas tank not filling up all the way. Rear cross tracking warning turned off when it is not turned off. AC smells rotten and musty
bought car brand new at 427 miles car started bucking shaking pulsating while driving bought to brennen gmc plattsburgh ny at 811 mile did same thing but worse brought back to dealership they put camshaft actuater and solenoid in at 6041 mile car was motor started knocking stalling controlable in traffic back at shop
GMC Acadia engine complaints by year
Acadia engine problems, every yearSource: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked . Complaints are owners' own reports and are not verified. How we use the data