No Predator Power

[MrBaadBoy]

Heeeelp diablo says a fuel issue??.....ok i change my cat filter(Nictane),6k miles And oem has less than 1k did not change that. Still no power any setting 40/65/ 85/120 ??? Tech asks me to see what is install so i find it and it;s 85 he says it should be in truck But there is no increase over stock Whats goin on or not going on............
2003 gmc 6.6 Hd sb cc Please some suggestions or actual help Thx John

 

[Noreaster]

Does your truck have Onstar? IIRC theres a problem with uploading with the Onstar fuse in, have to find my book to check on it.

 

[JD4440]

PM me and let me know if we can get together this weekend and I'll take a look see.