ive been having problems with my 2008 4.8L Silverado Single Cab reason why?? i really dont get them that well i get really confused?? i know how to tune 99 thru 06 trucks and trust me they work really well but these new body style trucks are really weird !so can some one please help me out with a file or something? so i can see some changes you guys have made! and thanks Hp Tuners


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