2009 GMC Sierra 1500 stutters at low rpm

The 6-peed transmission in the 2009 Sierra “stutters” or “slips” when shifting gears at low rmp. Neither the dealer nor a reputable local transmission shop can identify the problem with any certainty and it seems to be getting worse. It is most evident when the transmission temperature gets above 150 degrees.

I bought this truck a week ago with no warranty and am extremely concerned the transmission may take a dump on me in the near future.

Appreciate any info anyone may give with regard to this issue.


Was the transmission fluid ever replaced? If not, get it replaced ASAP

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Yup, fluid and filter change in a heartbeat. It may fix it, may not. But it doesn’t cost much to try.