tower...AWESOME idea!!!!
I would do that...f' them both!
If you can't make an exact photocopy for any reason ( paper is different, etc.. ) give the dealer back the original and send GM the photocopy along w/ a copy of the original letter ( photocopy it for your records ) and your honest opinion of your experience w/ the dealership...and your honest opinion of this situation...don't elude to giving the dealership the blank card and getting the gas...let the crocks square off w/ the mother ship on their own