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Yup I’ve tried everything except scan it but I had to get to work and take the wife’s vehicle. It would say preheating and then tell me to step on brake and push the button. All I heard was a click, check engine light would blink and then go solid but it would restart the preheat all over again...
I just saw this thread after I placed my order for the mx4. I really hope they corrected this issue. The mx4 fit perfect when I had my Denali and wanted the same exact thing.
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New here…Just traded in my 2017 GMC DenaliHD for a 2022 2500 MegaCab and I gotta say I’m loving it so far. Still getting used to the difference coming from the L5P with Banks tuner but still plenty of power.