K 1500 Yukon 4WD V8-5.3L VIN Z Flex Fuel (2003)
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten
Tighten the nuts to 9 N.m (80 lb in).
9. Install the air conditioning lines (2,3) and the nut (4) to the auxiliary HVAC module.
Tighten
Tighten the nut to 16 N.m (12 lb in).
10. Install the heater lines (2,3) to the auxiliary HVAC module at the underside of vehicle.
11. Lower the vehicle.
12. Fill the engine coolant.
13. Recharge the refrigerant to the system.
14. Leak test the fittings of the component using the J 39400-A.
