Notice: Refer to Fastener Notice in the Preface section.

Fastener Tightening Specifications: Refer to Fastener Tightening Specifications .

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

Bolt, Heater Inlet Tube

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

Tube, Heater Inlet

3

O-ring, Heater Inlet Tube

Tip
Remove and discard O-ring.