Preliminary Procedure

1. Drain the cooling system. Refer to Cooling System Draining and Filling.
2. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement.
3. Remove the heater outlet hose from the heater inlet tube. Refer to Heater Outlet Hose Replacement.

1

Heater Inlet Tube Bolt

Caution: Refer to Fastener Caution in the Preface section.

Tip
Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the threads of the heater inlet tube bolt.

Tighten
45 N·m (33 lb ft)

2

Heater Inlet Tube

3

Heater Inlet Tube O-ring

Tip
Remove and discard O-ring.