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  1. 03-20-2013, 01:43 PM #1
    repley81
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    Default Truck seems to gallop while breaking

    I have a 2008 GMC Sierra Denali that gallops while breaking. Dealership where I got it said "oh thats just how the AWD breaks"...I have a hard time believing this...Anyone have any ideas on what it could be?

    Ok I know I misspelled braking lol...
    Last edited by repley81; 03-20-2013 at 02:08 PM.
    2008 GMC Sierra Denali 6.2L AWD
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  2. 03-20-2013, 05:33 PM #2
    TimTom64b
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    How does it feel in the pedal? My guess is one of two things... antilock sensor(s) or a warped rotor. I'm sure others will chime in.
    2009 Chevy Silverado 2500HDLT 6.0L w/ Towing Package, Dick Cepek GM8 Rims, Dick Cepek FC II 33X11.50R17,RKSport Ram-Air Hood(Functional), Lazer Lite Aluminum Tonneau Cover, Road Armor Stealth Bumper, PIAA Lighting, Diablo Trinity Tuner, Diablew Custom Tune, BullyDog Cold Air Intake, American Racing Headers w/highflow cats, Corsa Performance Sport Exhaust, Custom Striping, Black Bowties front and rear.

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  3. 03-20-2013, 05:40 PM #3
    repley81
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    Default

    Just went and had the rotors rotated and it seemed to help a little. Now it seems the brake petal has to be pushed harder.
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  4. 03-20-2013, 05:54 PM #4
    RayVoy
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    I belong to an other forum where a lot of the members drive GM AWD trucks, I never heard of anyone having this problem. It may be caused by the transfer case, but it is not a normal condition. If the Cadillacs acted that way, they wouldn't sell many.

    Try shifting into neutral and then applying the brake, that will, at least, remove the engine from the equation.

    I am not familiar with that t-case, do you have a neutral position
    Ray

    '09 Avalanche LTZ - Black
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