I bought a Denali from Aaron and it was very high pressure and after I bought the vehicle, I had called and went into the dealership several times because my Onstar was not working correctly. When I went in the second to last time, he told me he didn't work for Onstar and walked away. I then talked to another salesman and he was able to help with no problems.
Twice I had gone into parts, one time to buy tires another time to get windshield wipers. When I went to order tires, the kid at the desk told me to go somewhere else it would be cheaper, even though, it would've been cheaper there because of the rebates and when I went to get the windshield wipers, again the kid at the desk couldn't help me put them on. Its not worth the aggravation.
If your going to buy a vehicle, go to Tim Tiernan