Sierra Denali AWD V8-6.2L (2008)
Housing Assembly HVAC: Service and Repair
HVAC Module Assembly Replacement
Tools Required
J 43181 Heater Line QC Release Tool
Removal Procedure
1. Drain the engine coolant. Refer to Cooling System Draining and Filling (Vac-N-Fill) Cooling System Draining and Filling (Static Fill).
2. Using the J 43181 disconnect the inlet heater hose from the heater core.
1. Install the J 43181 to the heater core pipe.
2. Close the tool around the heater core pipe.
3. Firmly pull the tool into the quick connect end of the heater hose.
4. Firmly grasp the heater hose. Pull the heater hose forward in order to disengage the inlet hose from the heater core.
3. Using the J 43181 disconnect the surge tank outlet hose from the heater core.
1. Install the J 43181 to the heater core pipe.
2. Close the tool around the heater core pipe.
3. Firmly pull the tool into the quick connect end of the heater hose.
4. Firmly grasp the heater hose. Pull the heater hose forward in order to disengage the surge tank outlet hose from the heater core.
4. Remove the upper intake manifold sight shield.
5. Remove the battery.
6. Remove the accumulator.
7. Remove the instrument panel to the service position.