I have a 2003 Chevy Tahoe LS. When i got it i only got one key and no key fobs. I had a 2002 Chevy Silverado LT previously and kept one key fob from it, hoping to program this key fob to my tahoe, but i cant get it to program. Before the key fob was on the silverado, it was on a 2004 Chevy...