Anyone have any problem with their Enclave pulling to one side or the other ? Ours has a very distinct tendency to go left, and it is a battle to keep it going straight! It started the day we got it, and we took it back to the dealer immediately. They said they couldn't make any adjustments until it had 500 miles. So, 500 miles later we went back. The dealer checked the alignment, etc, and said it is OK. But it still pulls left. We now have 5000 miles on it and it seems to be getting worse (or maybe I am just gettign tired of it!). The dealer wants us to bring it back for another "test drive". Any thoughts?