Two problems related to transmission not engage 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.
Brought it to the GMC dealer to replace the power steering pump which was on recall notice only if there were problems. Loss of power steering at low speed so I took it to dealer. As a result, pump was replaced as well as rack and pinion. Pump covered, rack and pinion not, $1700. The day after I picked up the car, the transmission failed. As I got on the highway, motor revved but transmission did not engage. Was able to make it into the breakdown lane. Had to have a flatbed pick it up and bring it to the transmission shop recommended by the dealer. Transmission replaced. . . $3,140. 00. I feel that I was lucky to have been in the lane closest to the breakdown lane when this happened. Dealer offered no assistance. Eight months past warranty.
At 72000 miles we had the Acadia serviced because of shifting problems, looked at again several times between them an 108000 when my wife had a near catastrophic failure as the transmission failed re engage while in drive in the middle of a busy intersection and called 911 because of the danger to my daughter, herself and those motorists on the road who couldn't see the hazard lights in the setting sun driving westbound - she narrowly avoided being rear ended and left the vehicle and sat on the embankment until police arrived.