How to replace Heater core for Chevrolet Express VAN, Avalanche and GM Savana?

In this chapter the details are provided for replacing heater core.
The heater core replacing procedure is for Chevrolet Avalanche, Express Van, and GM Savana  car models.

The procedure is mentioned with complete details and Helpful diagrams.
Diagrams makes the replacement much easier.

So the details to replace heater core are as follows :-----

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.

1. Drain the engine cooling system into a clean container for reuse.
2. Discharge and recover the air conditioning system refrigerant.
3. Remove or disconnect the following:
   
   
   Negative battery cable
   

   Heater hoses from the heater core
   

   Positive battery cable, the battery hold-down and the battery
   

   Refrigeration lines from the air conditioning accumulator and discard the gaskets
   

   Air conditioning accumulator
   

   Lower right kick panel and the knee bolster, from the right side
   

   Lower outer floor air outlet duct
   

   Heater case screws
   
4. Carefully open the heater core access door.
   
   
   Heater core-to-heater case retainers and the heater core
   
   

   

   

   Fig. Under hood view of the heater assembly-Express and Savana

   
   
   

   

   

   Fig. View of the heater case screws-Express and Savana

   
   
   

   

   

   Fig. View of the heater core and retainers-Express and Savana

To install:

1. Install or connect the following:
   
   
   Heater core and the heater core-to-heater case retainers. Carefully, close the heater core access door.
   

   Heater case screws
   

   Lower outer floor air outlet duct
   

   Knee bolster and the lower right kick panel
   

   Air conditioning accumulator.
   

   Refrigeration lines to the air conditioning accumulator, using new gaskets
   

   Battery, the battery hold-down and the positive battery cable
   

   Heater hoses to the heater core
   
2. Evacuate and charge the air conditioning system.
3. Refill the engine cooling system.
4. Connect the negative battery cable.
5. 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