One problem related to transmission slip out of gear has been reported for the 2009 Buick Enclave. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Buick Enclave based on all problems reported for the 2009 Enclave.
Driving on the highway the rpms started racing and it felt like the transmission was slipping. We started losing power and eventually the car would not shift out of first gear. Carmax had a dealership repair the transmission. We don't use this vehicle often so when we drive it several months later it seemed fine initially then after driving it a little more we started having the engine light come on and getting several fault codes and very rough shifting at lower speeds 30-35 mph. In the process of trying to get the issue fixed again.