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  1. #1

    Default 2004 suburban air conditioning issue

    I have a 2004 suburban that has just started blowing warm and sometimes very hot air out of the front vents while the back is blowing cold air. The air conditioning is on. I have both temps set to 68 front and back. 116,000 miles 4 wheel drive
    DONALD72

  2. #2

    Default

    I don't have any idea about this problem.if anybody has any idea about this please share with me.........

  3. #3

    Default

    Quote Originally Posted by emailrobertcena View Post
    I don't have any idea about this problem.if anybody has any idea about this please share with me.........
    Just a shot in the dark.

    Something's telling the heater core control valve to open allowing hot coolant to pass thru the heater core. Control valve should be in the firewall with two rubber hoses, one coming from the engine and other coming out of heater core.
    2011 Chevy Silverado LT 4WD 30k miles
    2001 Suburban 2WD, 5.3, V8 185k miles
    1993 964
    1996 318TI

  4. #4

    Default

    Check this TSB as well - talks about temps going up and yours is one of the associated years.

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