06 CrewCab Chevy

I just picked up a 06 5.3L Chevy with about 50K miles. What's a good programmer for it? Looking more for fuel mileage improvements. I put the DiabloSport on my 08 Hoe. That im very pleased with. Just wondering what else is out there.

Luis

Well I traded in that truck for a 2007.5 GMC SLT 4x4 CC/SB DMax. Its now EFILive tuned... Damn what a difference EFI made.