SUPERCHIPS & ONSTAR
#2
Yes, at least that's how the HPP3 works too. Disconnect the OnStar fuse, run handheld and then reinstall fuse.
Sometimes OnStar may attempt to communicate with your PCM and if that occured during program install may cause a problem.
Sometimes OnStar may attempt to communicate with your PCM and if that occured during program install may cause a problem.
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Corvette454l88
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brandon_6667
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Sep 6, 2015 04:49 PM
02, 1500, 2005, detect, diagnostics, disconnect, fuse, gmc, issue, onstar, problem, sierra, superchips, test, yukon




