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2003 Yukon SLT 5.3l with 3.73 gears and 4x4 w/air

Averaging 24 mpg highway and 21-22 city depending on traffic, lots of stop and go drops it appreciativley with no help for that unless it is to...

I have tried to install the standard version with the beta version. The standard version gives a not compatible and ends the installation. The beta works fine. Support informed me that I should only...

is it possible the anti theft needs to be disabled?

95047

try tis for main VE
2003 5.3 4x4

hope this came thru

Sure you are...Your car, Your HPTuners rig. Learn to use it instead of running around looking for the easy fix from someone else.
If you want something for free do not complain if the other tuner...

fleshe
dont be an ass

The tune repository has 5.3 tunes for years 2003 to 2007. You can compare a 2003 to 2005 5.3 v8 Chevy and GMC- same or similar. Don't do a copy paste from one to the other it may get you in trouble....

thank you

2003 yukon 4x4 tuning for economy

Hi everyone

I have a 2006 pontiac montana 3.5l and am asking if there is a tunable pcm that I can swap for the OEM one in the vehicle?

THX