I have a 2002, Z-71, had my first flat and was surprised to find a firestone tire on a black steel rim, as my spare! I'm wondering if this is what I should have. the Z-71 package I purchased has the crome wheels and goodyear tires. I went to my dealer and he said that chevy puts anything they have on stock as a spare. IS THAT RIGHT? if so where do i go to get the right tire. thanks jeff