Sierra Classic 1500 4WD V8-5.3L (2007)
Installation Procedure
Important: If replacing the evaporator core, add the refrigerant oil to the evaporator core. Refer to Refrigerant System Capacities.
1. Install the evaporator core (1) to the HVAC module assembly (2).
2. Install the upper HVAC module assembly (2) from the lower HVAC module assembly (1)
3. Install the evaporator cowl gasket to the evaporator.
Notice: Refer to Fastener Notice.
4. Install the screws to the HVAC module assembly.
Tighten the screws to 2 N.m (18 lb in).
5. Install the HVAC module assembly.
