any good chips that will help on gas my bro has a 05 gmc 4door 5.3

 

chip's aren't replacable in that truck. this isn't the stone age of computers anymore.

 

I would go with a nelson tune (nelsonperformance.com) or similar. Zippy is right, you can't change chips in the computers on these trucks. If you don't want a custom tune you can go with a Hypertech or Superchips programmer.

 

Get a wait4me tune. It rocks. Better mileage and more hp. It only costs $157. Any handheld will cost more than double that.