Hey guys I'm new to the world of tuning and need some help . I have a fresh lm7 5.3 ,hooker long tubes, full hooker ls swap exhaust and 4l60e trans bracket ,new valve springs ,comp thumpr 275t. The lm7 is a drive by wire setup and is a 2003 Silverado engine . I swapped it in my 85 c10 swb and am at the tuning point . I bought hp tuners and googled a lot and read a lot on this forum and it helped me get to the ok idle and ok drive performance . My problem is it will not idle with out being rich and it will not idle well in gear at all and slightly bucks at the stop light.I followed a few tunes posted up here and no luck .I also tried the repository and downloaded different tunes and compared them also copied and pasted with no luck either. No one seems to tune the cam I have . Thanks guys for the help ahead of time .