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Old 01-24-2021, 03:01 PM   #4
EVRLET
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Join Date: Aug 2015
Location: Las Vegas NV
Posts: 354
Re: 6 speed suddenly rough shifting

Trans codes don’t often trigger a check engine light. You need a scanner that can read into the trans controller and pull stored codes. A simple code reader usually won’t cut it. If you’re going to take it to the dealership, they’ll scan and more than likely pull a code. Let us know if there was a code and what the code is.
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