You won't get huge gains, but I have heard good things about the predator programmer....I have one on the way and will be testing it here soon. I gave up on trying to improve the mileage on my truck...I bought it to drive and use it. I don't think I get bad mileage for an almost 7000 lb truck. I definately get better mileage than my 2001 silverado 1500 with the 5.3 gas guzzler. 
__________________ 2004 GMC 2500HD D/A CC Carbon Metallic w/ LB7
4" turbo back MBRP exhaust
TST Powermax Programmer, Diablosport Predator
285/75-16 BFG T/A KOs, Eagle Alloys Series 187
Clifford 2 way remote start, High Idle, Bilsteins
Extang Classic Platinum Tonneau Cover
AFE Magnum Force Stage 2 Proguard 7 intake Kennedy Diesel Merchant Automotive My Photos |