A Subaru dealership let me charge $3K on my GM card on the purchase of a Subaru CrossTrek. He even upped it past their company's $1500 limit to make me happy.GM credit card rebate? Use rebate to purchase used Volt? GM Buypower card = no. GM Extended Family can take rebate in cash where you can use it on any purchase including a used Volt.
If you want to put the purchase on the card? I have not found a GM dealer willing to do that.