Escalade, Suburban 1500 & 2500, Tahoe, Yukon, Yukon XL 1500 & 2500 (2006-2007), Yukon Denali and Yukon Denali XL (2005-2006)

Removal & Installation

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  1. Drain the engine cooling system into a clean container for reuse.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Heater hoses from the heater core
     
    Temperature control cable from the heater case assembly
     
    Disconnect the mode control cable from the heater case assembly
     
    Instrument panel carrier to provide access to the heater case assembly
     
    Electrical connectors that may interfere with the heater case assembly removal
     
    Heater case assembly-to-chassis screws/nuts and the assembly. Place the heater case assembly on a bench.
     
    Heater core cover screws
     
    Heater core from the heater case

    Click image to see an enlarged view

    Fig. View of the heater case assembly



    Click image to see an enlarged view

    Fig. View of the heater core

     

  4.  

To install:

  1. Install or connect the following:

    Heater core to the heater case
     
    Heater core cover screws and tighten to 14 inch lbs. (1.5 Nm)
     
    Heater case assembly and the assembly-to-chassis screws, then, tighten the screws to 35 inch lbs. (4 Nm) and the nuts to 80 inch lbs. (9 Nm)
     
    Electrical connectors, as necessary
     
    Instrument panel carrier
     
    Mode control cable to the heater case assembly
     
    Temperature control cable to the heater case assembly
     
    Heater hoses to the heater core
     
    Negative battery cable.
     

  2.  
  3. Refill the engine cooling system.
  4.  
  5. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.
  6.  

 
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