Did you know?5.3L 'Vortec' 5300 V8 with Active Fuel Management, 320 hp (239 kW).
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3 core intercooler huge diff.
ok bad day so far. it seems that the 2006 av has a stand alone cpu mapping its the same up to 2005 and different for 2007. so know when trying to do the speed dens tune it wont take properly to dial it in so we are having a new cpu file written for the truck which takes about 8 hrs. so now maybe wed. night or thur. however thur. im flying to st. louis for a fam reunion and wont be back untill sun. and monday is labor day so thats tue. and then I might have to go back offshore tue.(back to work) so everyone please pray to the gm gods that it gets done by wed.