Sierra 1500 2WD V8-5.3L VIN B HO (2006)
1. Install the heater core (2) to the HVAC module assembly (3).
2. Install the heater core cowl gasket (1) to the heater core (2).
3. Install the heater core cover (1) to the HVAC module assembly (2).
NOTE: Refer to Fastener Notice in Service Precautions.
4. Install the screws to the heater core cover (1).
Tighten
Tighten the screws to 2 N.m (18 lb in).
5. Install the HVAC module assembly.