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  1. #1

    Default Down Hill Surge in Cruize

    I have a 2004 2500HD Auto, 4x4 and when I have the cruize contol set and start to descend down a hill, the truck/motor surges about 3-5 times then smoothens out. The surge cycle time is about once per second, and is seen in the tach and can also heard in the exhaust. Any ideas/advise/similar happenings?

  2. #2
    Legend unplugged's Avatar
    Join Date
    Sep 2006
    High Deserts of SoCal


    My 06 2500HD did that especially if the tow mode was set. Seemed like the ecm couldn't keep up.
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    High Desert SoCal
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  3. #3

    Cool Down Hill Surge in Cruize

    My 96 Suburban, 05 Z-71 and wifes Trailblazer does same thing. Doesnt seem to bother anything.

  4. #4


    As said above, it doesnt seem to have an immediate harm to anything, just annoying.

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