Unethical, from the General Manager down thru the entire sales & service department.  I was baited & switched to get me into the dealership (they told me the car I was interested in had Navigation, only to find out once I got down there it didnt(a 80 mile roundtrip).  After 2 hours of negotiating the navi into the price, I go to sign papers & they have the navi as additional cost. My wife & I caught the sales person & sales agent in a blatant lie so we walked out the door. I got the GM involved & after talking to them, he told me a completely different version of what transpired. I should have knew it then, but the GM offered me a great price & said he would give me the navi at their price.  So, I bought the car.  One week later had it in for major issues (liftgate leaked- seats & carpet moldy & rusted). Various parts were not  working(5 separate things).  Not what you would expect for buying a brand new Buick Enclave (>$40k).  Anyways, I have had the car into the dealership over 6 times in the 4 months I have owned it & still having repeat repair occuring.  Same air vent fixed twice now & still messed up.  So, anyways, back to the navi.  They installed a cheap aftermarket system which at most cost them about $1200.  so, even though I was to pay their invoice(deal that GM & I made), I paid $2300.  They have serviced this stereo system 3 times now & still not working.  I am now suing them for the $2500, have filed a complaint with the BBB & taking as much action to solve the problem. They said they will not do anything more to get me the system I actually deserve.  they are unethical & they have a standard procedure called cutting corners to save a buck.  Unfortunately it has cost me more time & money than what I was saving on the car.  They are not a member of the better business bureau & they have an 'F' rating with them.  If only I had known prior to buying the car.  Run, run, run, Run from this dealership.  A good deal is not a good deal afterall.  If they dont lie & cheat to you to sell the car, they will cheat you in the service department.  I have several calls into Autonation Corporate office, with no returned calls.  What a joke