Express 2500 V6-4.3L VIN X (2005)
1. Install the heater core.
NOTE: Refer to Fastener Notice in Service Precautions.
2. Install the heater core retainers.
Tighten
Tighten the screws to 1.9 N.m (17 lb in).
3. Install the heater core access door.
4. Install the heater core access door retaining screws.
Tighten
Tighten the screws to 1.9 N.m (17 lb in).
5. Install the inlet and outlet heater hoses to the heater core.
6. Install the heater hose clamps using the J 38185.
7. Fill the engine coolant. Refer to Draining and Filling Cooling System in Cooling System.