Ok so I have a 2003 Texas edition Silverado with a 4.8 and it has only a flowmaster American thunder exhaust and ran fine before but after installing the airaid the truck idles way low and dies at a stop, wondering if it could be a vacuum leak or take the intake off, OR get a programmer and raise the idle and load a custom tune to fix my problem. If I get a tuner I'm stuck on the bully dog GT, Diablo intune, or a flashpaq system, which has the most parameters to change?

 

Bump.

 

Another bump.