GMCYukalade
Full Access Member
The ones that plug into the IAT on the intake? - all they are are resistors in a fancy package that plugs into the IAT... - if you have bought one.. you might want to read this:
http://reviews.ebay.com/ebaymotors/Fake-Modification-Chips_W0QQugidZ10000000001478993
http://reviews.ebay.com/ebaymotors/Fake-Modification-Chips_W0QQugidZ10000000001478993