Heater core Replacing on Chevrolet, GMC and Cadillac?

The procedure to replace heater core.
Auxiliary Heater core and Under Glove Box Heater core.
The procedure for both heater core replacing is as follows:----
This procedure mentioned here is similar for
Cadillac Escalade, GMC Suburban 1500 & 2500, Chevrolet Tahoe, Yukon, Yukon XL 1500 & 2500 (2006-2007), Yukon Denali and Yukon Denali XL (2005-2006).

The details to replace Auxiliary heater core is as follows:----

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

   Rear quarter trim panel, as necessary

   Right rear quarter trim panel

   Right rear wheelhouse

   Heater hoses from the rear auxiliary heater core

   Electrical connectors, as necessary

   Drain valve

   Rear auxiliary heater assembly-to-chassis nuts and bolts

   Rear auxiliary heater assembly

   Blower motor from the heater assembly, if necessary

   Rear auxiliary heater assembly cover

   Heater core from the rear auxiliary assembly 
   
   
   

   Fig. View of the rear auxiliary HVAC assembly-Suburban shown; other models similar

To install:

1. Install or connect the following:
   
   
   Heater core to the rear auxiliary assembly

   Rear auxiliary heater assembly cover

   Blower motor to the heater assembly, if removed

   Rear auxiliary heater assembly

   Rear auxiliary heater assembly-to-chassis nuts and bolts. Torque the bolts to 13 inch lbs. (1.5 Nm) and the nuts to 89 inch lbs. (10 Nm).

   Drain valve

   Electrical connectors, as necessary

   Heater hoses to the rear auxiliary heater core

   Right rear wheelhouse

   Right rear quarter trim panel

   Rear quarter trim panel, as necessary
2. Refill the engine cooling system.
3. Connect the negative battery cable.
4. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.

UNDER GLOVE BOX HEATER CORE REMOVAL PROCEDURE:----

1. Drain the engine cooling system into a clean container for reuse.
2. 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 
   
   
   

   Fig. View of the heater case assembly

   
   
   

   Fig. View of the heater core

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

These details will help.

Thanks.           

FOR MORE HELP GO TO: ---

Car repair guide?

http://technoanswers.blogspot.in/2012/03/car-repair-guide.html