I really regret purchasing my Buick Enclave. This is the first time I have purchased a Buick and it will be the last! Had to have transmission fixed. It took 3 weeks. Now having the same problem. When driving the car suddenly downshifts and I go from 65mph to 45mph and can not do anything about it. The last time I lost all power steering. Very dangerous when it happens on the highway. My car is at the dealership right now and I do not want it back!