Re: hypertech programer
You like myself have a 2003 you would use the model 30019 for programming. Mine has the following on the back of it,
PN:30019, SN:120****, Rev: 05.24.014.48, 2003 GM Trk/SUV/Hummer H2
4.3/4.8/5.3/6.0/8.1L copyright Hypertech Inc. 1999 This is all because I traded it in and have the latest softeware in it.
If it does not work per your words "My guess is it is used and he didn't reset his truck to factory" you'll have to wait and talk to the guys at Hypertech to see what your option are.
Later, easy Ed
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