Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
24,667 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2012 GMC Acadia engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2012 GMC Acadia:

Unsubscribe any time. We don't sell/share your email.

2012 GMC Acadia Owner Comments

problem #3

Sep 302015


  • 60,000 miles


The contact owns a 2012 GMC Acadia. While driving approximately 65 mph, the speedometer decreased to zero and the vehicle failed to accelerate. In addition, the traction control, stabilitrak, and the all wheel drive warning lights illuminated and deactivated. The vehicle independently switched to rear wheel drive. The failure recurred numerous times. The vehicle was taken to a dealer where the cause of the failure was undetermined. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 60,000.

- Chugiak, AK, USA

problem #2

May 282012


  • 11,000 miles
The contact owns a 2012 GMC Acadia. The contact stated while driving 65 mph, the stability control warning light and the idle mode light illuminated on the instrument panel. The speed reduced rapidly to 15 mph. The contact pulled over to shut off and restart the vehicle and the vehicle functioned normally. The vehicle was taken to the dealer for inspection and they informed the contact that throttle body needed to be adjusted. The vehicle was repaired but the failure recurred. The manufacturer was not notified. The failure mileage was 11000.

- Miami, FL, USA

problem #1

Nov 152011

Acadia 6-cyl

  • 3,000 miles
The contact owns a 2012 GMC Acadia. While driving approximately 65 mph, the contact disengaged the accelerator pedal briefly while switching lanes. Upon engaging the accelerator pedal again there was an increase in the RPM reading but the vehicle would not accelerate. The vehicle was taken to the dealer for diagnostic. The technician stated the vehicles computer needs to recognize the throttle gear which caused the hesitation. The technician stated there was no repair necessary. The vehicle was not repaired. The approximate failure mileage was 3,000. The consumer also stated the same issue occurred when slowly approaching a light, that then turned to green before coming to a full stop. When he applied the gas, the engine RPM's would rise, but the transmission did not engage for a period of 3-5 seconds. Updated 04/25/12

- Clifton Park, NY, USA

Not what you are looking for?