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  1. #1

    Default 2000 tahoe overheating help!!

    hi al!l i have a 2000 tahoe 5.3 with an overheating issue here are the symptoms and heres what ive fixed so far....
    truck will not overheat at idle only when driving around or sitting still and holding high rpms
    have already changed the thermostat and fan clutch as the fan clutch was very weak and the thermostat could use changing anyways.. any ideas? thank you for your time!

  2. #2

    Default

    Rad plugged with debris so air can not flow, bad water pump, plugged hose.

    Can you feel water flowing through the top hose?
    Ray

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

  3. #3

    Default

    im thinking its the water pump. the outside of radiator is fine theres no coolant in the oil

  4. #4

    Default

    There may be something clogging the radiator internally making it cool less efficiently at speed. I think @donyms had a similar problem and replacing his radiator fixed it.

    1996 Chevy Tahoe LT 5.7L V8 4X4 205,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
    Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.

    Check out my other mods in My Garage: http://www.gmtruckclub.com/forum/sho...t-Tahoe-4-Door

  5. #5

    Default

    Couldn't feel water flowing through still had the red dexcool water pump sounds like crap when I took the fan and belt off and spun it by hand so thats going to be replaced regardless. Other than that I'm going to flush the cooling system by hose and see if there's any clogs thanks for the help so far guys

  6. #6

    Default

    No problem and if the bearings feel junky it needs to be replaced.

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