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  1. #1

    Default Heating issue...'04 Silverado

    Here's the run down. My truck ran into a snow back about 2 weeks ago and now the heater doesn't heat until I rev the engine above approx. 2000rpm. If the truck is idle the heater will blow cool air even when the engine is completely warmed up (half way up temp guage). Once I push the accelerator however the heater works just fine. Also once I have driven the truck and then let it sit again, the heater will continue to blow hot air for a minute or two before going back to blowing cool air. I can't for the life of me, figure out what is causing this. Any help will be much appreciated.


  2. #2
    Sr. Apprentice
    Join Date
    Dec 2008


    Check and see if the upper radiator hose is not collapsing and not allowing the water to flow through the engine

  3. #3

  4. #4


    Thank you. I'll let you know what I find.

  5. #5


    Thanks you all. I ended up finding a coolant leak. It is now fixed and the heat is back. Thanks again.

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