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bkyle17

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  1. bkyle17
    Just bought a new 2017 6.2L Sierra Denali 1500. It has a subtle rough idle. Thought it would resolve with premium fuel but no luck. Brought it to dealer but computer didn’t show any abnormalities. Also occasionally as I slow down the tranny seems to “catch” as it down shifts to first. Not sure if it’s realated to the rough idle. Any thoughts on either issue? Thanks!
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