Two problems related to car stall have been reported for the 2009 GMC Acadia. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 GMC Acadia based on all problems reported for the 2009 Acadia.
My vehicle turned off while driving on a side highway, and was unable to be jump started. Took it to a mechanic and found the ecm was bad. Mechanic called different dealerships to price an ecm, and was told by each dealership that this is a common problem. He was informed that even with a new ecm installed, it may go out in another year.
Car stalls as I am turning into parking spots, turning or going around significant curves in the road, while im in a round about etc. Luckily I have been able to put the car in neutral and it starts back up and off I go. I am the second owner of this car and I bought it from a non gm dealer. My mechanic is at a loss as to what is wrong because a) there are no codes that are coming up and b) the stalling is very sporadic, it will do it twice in one week and then not do it again for 3 weeks. I have had this car about 5 months and it has happened about a dozen times. I pulled the carfax and called the dealership that did all the work on it with the previous owner. After speaking with the service department, I was told that the previous owner had the same problems and the dealer could not get the car to malfunction while they had it in for servicing. Although she didn't tell me everything that they did to try and resolve the issue, I do know that they went as far as to replace the cylinder head hoping that would solve the issue, but clearly it did not. This is a very dangerous safety issue, I have almost hit several cars due to the fact that when the car stalls, everything locks up and you have no control over anything.