What kind of intake and computer programerdo you think is best for an 03 gmc 4.8L?

 

Intake: If you absolutely have to have something aftermarket, look at Volant or Granatelli. If you want to save some $$$, modify your own airbox and put a K&N direct replacement filter. I did that and have had great results ...and saved about $250.00 - $300.00

Programmer: Best bet is a custom tune, like Nelson or Wheatly Performance. Depending on cash flow ...Diablo Predator is probably the best, but also one of the more expensive products. Superchips is more middle of the road.... low end would be Hypertech.

That's not to say that Hypertech doesn't work ...it does, but it's not the best.

Best of luck!