SOURCE: 2012 buick verano transmission lag
Tell dealer to do a trans flush with a TECH II and reset the trans adapts and should be good, this is all done by a electronic tool called a Tech II
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SOURCE: 2012 buick verano piston rings sticking causing rough idle,engine stalling
There is no way to call that without tearing the engine down. Run the fault codes, check idle control, eliminate all other possibilities first.
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