I need to find a chip and tuner for my 99 4.2L. is there any stand out brands i should try?

 

This question is constantly asked over and over. In a nutshell, if your truck is stock, go with a Edge Evolution. If it has some mods on it like intake, exhaust, etc.. look at Troyer for custom tunes.

http://www.troyerperformance.com/cgi...&link=mainpage

If you still need more info, use the search feature here on this website. You'll have more info than you could ask for!