Three problems related to engine belts and pulleys have been reported for the 2007 GMC Acadia. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 GMC Acadia based on all problems reported for the 2007 Acadia.
Tl- the contact owns a 2007 GMC Acadia. The contact stated that the engine could not be started. The vehicle was towed to an independent mechanic who diagnosed that the timing belt was faulty. The vehicle was not repaired. The manufacturer was not notified. The VIN was not available. The failure mileage was 120,000. Jft.
While driving, the vehicle started skipping/catching while accelerating and the temperature gauge started to creep up. I entered a left turn lane in order to pull over. When traffic cleared I attempted to accelerate to make it into the parking lot. Warning bells started going off "shut off engine" "shut off a/c" "enging overheat" and the truck shut off. I had picked up enough momentum as I had begun my turn but it was still literally a coast into the parking lot, narrowly avoiding a t-bone situation with an oncoming Mini van. It was so close the Mini-van laid on the horn and slammed on her brakes. I coasted into the parking lot but was unable to make it into a spot. I took out my keys and opened my door to get out. The alarms continued even without keys in it. There was antifreeze pouring out from underneath the vehicle. I had to turn on and off the car no less than three times to stop the warning bells. I called a local shop and had it towed. They replaced the water pump and a/c belt. Got my vehicle back two days later. Drove to work in the morning with no issues, however coming home it started to catch/skip again. (I live only 5 miles away from work). I had my husband drive it back up to the shop to have it looked at. When he got into it he was unable to reverse it; reverse just simply stopped working. He had to turn around in our yard - on the way to the shop (6 miles away) the vehicle would not go over 30 mph and again shut off on him while trying to turn into the auto shop. The diagnosis now is that it needs a new transmission. Upon further online research I have found thousands of other owners of the same model/make and year with the exact same issues occurring roughly around the same mileage/time frame. There are three other Acadias alone at our local gm dealership waiting to be fixed with the exact same issues.
In the rain or during wet road conditions the serpentine belt gets wet due to it's location at the bottom of the engine compartment. When this occurs the belt starts to slip causing an intermittent squealing and intermittent lose of steering control.