Avalanche 1500 4WD V8-5.3L VIN T (2003)
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten
Tighten the nut to 7 N.m (62 lb in).
4. Install the auxiliary heater pipes (2, 3) to the auxiliary heater core.
5. Install the right front wheelhouse panel.
6. Install the right rear wheelhouse panel.
7. Install both of the right tires.
8. Install the auxiliary heater pipes (1, 2) to the heater inlet and outlet tees (3, 4).
9. Connect the outlet heater hose to the heater core.
10. Connect the inlet heater hose to the heater core.
11. Fill the cooling system.
Heater Hose Replacement - Inlet
REMOVAL PROCEDURE
1. Drain the cooling system.
2. Remove the air intake tube.
3. Remove the heater and surge tank hose from the mounting clip.