Hey Guys I have a 2003 GMC Sierra with a 5.3 that I just bought used. I was wondering is there away to verify if the vehicle is ruuning on the Stock Tune/Software? AS I stated I bought the vehicle used and I speculate that possibly the vehicle was tuned prior to me purchasing it? Is there away to confirm whether the vehicle is running on the stock orinal tune from Factory?

 

have somebody with software pull the tune and compare it to a stock OS.

Where you located?
Why does it matter?

 

I am from Maine. I was just wondering for my piece of mind so I know the history of the truck and whether it is or isnt in case i have issues

 

the probability of it having anything other than the stock tune is almost zero, unless you have reason to believe otherwise.

 

what are your shift points at wide open throttle? if its tuned, they should be quite a bit higher..also, does the tow/haul button act normal? as in rpms are higher during normal driving? or are they the same, but just firmer shifts, etc?

also look at the computer in the engine bay..if it was from a tuner like blackbear, wheatly, waitforme etc it should have a sticker on it..

 

The Shift point are Higher and more firm also I looked around in the truck and found a manual for bullydog?? from the previous owner in the cab of the truck

 

aaaah... bullydog....

it's probably got a tune in it then... that's a programmer/tuner....

get it flashed back to a stock GM tune by a dealer before you use your Predator on it, or you'll have problems...

 

How are the Bully Dog Prgrammers?? Is there reason for concern?? New to alot of this so not sure

 

predator's are better than the bullydog...

better tunes, more flexibility, more adjustability, etc etc...

 

Do you work for diablo?