Chevrolet Silverado / GMC Sierra. Service manual — part 2333

Fig. 75: Identifying Heater Hose To Heater Core Fittings
Courtesy of GENERAL MOTORS CORP.

11. Install the surge tank outlet hose to the heater core.

Firmly push the quick connect onto the heater core pipe until you hear an audible click.

12. Install the inlet heater hose to the heater core.

Firmly push the quick connect onto the heater core pipe until you hear an audible click.

13. Fill the engine coolant. Refer to Cooling System Draining and Filling (Vac-N-Fill) or

Cooling System Draining and Filling (Static Fill) .

AIR CONDITIONING EVAPORATOR CORE REPLACEMENT

2008 Chevrolet Silverado 1500

2008 HVAC Heating, Ventilation, and Air Conditioning - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Removal Procedure

Fig. 76: Heat Stakes
Courtesy of GENERAL MOTORS CORP.

1. Remove the HVAC module. Refer to HVAC Module Assembly Replacement.

2. If equipped remove the heat stakes (1) from the HVAC module (2) with a screw driver and

a hammer.

3. Disconnect all wiring connections from blower motor, blower motor control module and

sensors. Also, remove all wiring from retainers before removal.

2008 Chevrolet Silverado 1500

2008 HVAC Heating, Ventilation, and Air Conditioning - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 77: View Of Upper & Lower HVAC Module Assemblies (Delphi)
Courtesy of GENERAL MOTORS CORP.

4. If equipped remove the screws from the HVAC module assembly.

5. Remove the evaporator cowl gasket from the evaporator.

6. Separate the upper HVAC module assembly (2) from the lower HVAC module assembly

(1)

2008 Chevrolet Silverado 1500

2008 HVAC Heating, Ventilation, and Air Conditioning - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 78: View Of Evaporator Core (Delphi)
Courtesy of GENERAL MOTORS CORP.

7. Remove the evaporator core (1) from the upper HVAC module assembly (2).

Installation Procedure

IMPORTANT: If replacing the evaporator core, add the refrigerant oil to the

evaporator core. Refer to Refrigerant System Capacities.

2008 Chevrolet Silverado 1500

2008 HVAC Heating, Ventilation, and Air Conditioning - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado