I am looking to buy a 2003-05 tahoe or yukon. I like the denali and z71 tahoe but would be happy with a slt. The ones i am looking at are between 70-100k miles on them. i just want to know what will need replaced soon. i mean EVERY little thing. i want to know what im getting into. and is there any reason i should stick away from the denali. thanks alot