Had my alternator replaced in a 2006 Chevy HHR, now it shifts hard and the check engine light is on. Please help!
One has nothing to do with the other or even your light coming on. maybe the shop took your car for a hard test drive and now they messed up your trans and that will cause your engine light to come on. Not saying that's the case but like i said , the alt. has nothing to do the transmission although if they connected the alt wrong or have the wrong one in there then that might get your light to go on,.. just guessing there though
No one drove it after took it to have it checked the obd2 port has no power
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