road1will
pretty pretty good
..
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Highly debatable topic....the end result usually favors a custom tune....I've run both... so I'm not really just talking out of my ass.
The reason I tried to load it on my tahoe was to make sure it was in working condition so I can sell it. I'm having justin tune my tahoe in august when he comes here.
So I take it you put your computer back to stock before taking it into the dealer? If that's the case the handheld then becomes unlocked. I'd plug it into another gm vehicle that fits the list and see if it does anything...It might think it's locked down.