Heater Pipes Replacement

Heater Pipes Replacement

Removal Procedure

Important: Do not disconnect the reservoir hose from the reservoir.

1. Remove and reposition the coolant reservoir.
2. Drain the cooling system. Refer to Draining and Filling Cooling System (Static Fill) Draining and Filling Cooling System (Vac-N-Fill).
3. Remove the air cleaner intake duct with the mass air flow (MAF) sensor and the positive crankcase ventilation (PCV) hose.
4. Disconnect the heater hoses from the heater pipes.






Important: Use a universal or swivel-socket with an extension in order to remove the heater pipe bolts.

5. Remove the heater pipe bolts.
6. Remove the heater pipe assembly.
7. Remove and discard the O-ring seal and gasket.
8. Clean the gasket sealing surfaces.

Installation Procedure






Important: Use gasket sealing compound GM P/N 01050026, or equivalent, to secure the new gasket to the heater pipes.

1. Install a new O-ring seal and gasket to the heater pipe assembly.
2. Install the heater pipe assembly.

Notice: Refer to Fastener Notice.

Important: Use a universal or swivel-socket with an extension in order to install the heater pipe bolts.

3. Install the heater inlet pipe bolts.

Tighten the heater pipe bolts to 10 N.m (89 lb in).

4. Connect the heater hoses to the heater pipes.
5. Install the air cleaner intake duct.
6. Fill the cooling system. Refer to Draining and Filling Cooling System (Static Fill) Draining and Filling Cooling System (Vac-N-Fill).
7. Install the coolant reservoir.