<prompt> Human: I recently purchased a 2014 Chevy Impala LTZ. It is by far the best looking car Ive had and loaded with features. I just discovered the GM BuyPower cash back credit card; 5 on the first 5,000 and then 2 unlimited cash back after that with no annual fee. The only catch is the reward money can only be used towards the purchase of a GM car. Obviously youll be banking reward dollars for years. Has anyone had experience using this credit card? Im curious to know how much anyone managed to knock off the price of their car  <response>: I dont really consider a card where the points can only be redeemed for a specific thing as cash back.Cash back implies you get...cash...back. As in you charge stuff and then get points or whatever that are redeemed for cash. Like citi double cash or chase freedom.The only way for you to redeem these points is by buying a GM car. Not great IMO. 