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Thread: 2013 sierra hd

  1. #1

    Default 2013 sierra hd

    Has anyone else had troubles with their 6 litre trucks not shifting into 5th or 6 th gear when the weather is cold while pulling a trailer. my truck will not come out of 4th gear while pulling my enclosed cargo trailer ,rpm is at about 3200 and will not shift if it is below -10 celsius .

  2. #2


    Never pulled my trailer in the cold. I have not experienced anything like this on my truck driving it in -30c.
    Finally a signature and Avatar! I also posted some pics in the Gallery.
    2011 2500HD Crew Cab 4X4 Z71 6Liter.
    2011 Outback Travel Trailer 260FL
    So Happy to not be on the edge of GVWR Over Load!!

  3. #3


    Father in law has same truck as you and never had a problem either until we tried it in the cold, normally he only ever pulls in summer and everything works fine. Mine works fine without trailer and when it is above -10. Will have to wait and see next winter if it does it again.

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