K 2500 Suburban 4WD V8-6.0L VIN U (2001)
17. 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 ft)
18. Install the heater lines (2,3) to the auxiliary HVAC module at the underside of vehicle.
19. Remove the safety stands.
20. Lower the vehicle.
21. Fill the engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling.
22. Recharge the refrigerant to the system.
