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Just wondering exactly how I could tell if my car has the z51 package or not? I bought it and it did not come with the window sticker or anything..thanks
Open you glove box, in the area to the left you will see a sticker that says "service parts ID" (or something like that) There are a bunch of 3 digit numbers / letters, Look for Z51.
On mine its in the last row toward the end.
What year is it? If it's '05 or '06 and has factory drilled rotors, it's got the Z51 package. If it's '07 or later and has drilled rotors, it's a Z51 or F55. If it's F55 it'll have the button on the console.