Express 3/4 Ton Van V6-4.3L VIN W (1998)
8. The heater line to the underside of the auxiliary heater, if equipped.
9. The heater lines from the underside of the auxiliary heater.
10. The retaining nuts from the underside of the auxiliary heater.
11. The auxiliary heater from the vehicle.
Install or Connect
1. The auxiliary heater to the vehicle.
2. The retaining nuts to the underside of the auxiliary heater.
Tighten
^
The auxiliary heater retaining nuts to 10 N.m (89 lb. in.).
3. The heater lines to the underside of the auxiliary heater.
4. The heater lines to the underside of the auxiliary heater, if equipped.
Tighten
^
The heater line retaining nut to 25 N.m (18 lb. ft.).
5. The heater and heater line cover to the underside of the auxiliary heater.
6. The electrical connectors to the auxiliary heater.
7. The heater to floor vent duct.
8. The heater to roof duct from the auxiliary heater.
9. The rear quarter trim panels.
10. Recharge the refrigerant if equipped with A/C.
11. Verify that all engine grounds are clean and tight to ensure no electrical current can flow through the coolant.
NOTICE: A milliamp of electrical current in the coolant can cause premature wear on cooling components. Ensure that all engine grounds
are clean and tight and repair as necessary.
12. Fill the engine coolant.
