[Dave LV]

From what I have read about lemon laws, you are falling for what GM wants you to do, not what the law says. If you win a lemon law complaint, GM must give you all of your money, downpayment, taxes, payments, etc back and then a fair value for the miles used will be negotiated.

Before swapping, I suggest you find one of the lemon law lawyers on the web and consult with them. All will review your case for free because also GM must fully pay for all lawyer fees under the lemon law and so if you have a good case, they will take it.