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Thread: Tow/Haul Mode

  1. #1

    Default Tow/Haul Mode

    Hello, my truck has the tow/haul mode control on it and it stop working awhile ago. My Hayes book has nothing on this what so ever as I can find and cannot find a fuse or relay for it, just wondering if anyone else has run into this problem and what they had to do to get it working again. Thanks, Dan

  2. #2

    Default

    Quote Originally Posted by ChevyDan View Post
    Hello, my truck has the tow/haul mode control on it and it stop working awhile ago. My Hayes book has nothing on this what so ever as I can find and cannot find a fuse or relay for it, just wondering if anyone else has run into this problem and what they had to do to get it working again. Thanks, Dan
    There is no relay or fuse Dan. The switch is just a momentary switch which sends a signal to the
    PCM. The switches do go bad and are very easy to diagnose. If you had a scanner you could just look at the data as you pushed the button. If no change is seen on the scanner the odds are the switch went open. Without a scanner you can just ground the wire at the switch. If the light comes on in the dash you have proved the switch is bad.
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows



    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  3. #3

    Default Thanks

    Hey Jim, thanks for the reply. No I do not a scanner yet but have been looking at some, want to get one in the near future. Will try the grounding thing and go from there, Thanks, Dan

  4. #4

    Default

    You need a new shift lever with a tow/haul switch. The same thing happened to my neighbor's truck.
    -

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