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Chevrolet Silverado / GMC Sierra. Manual - part 2312
Fig. 5: Draining A/C Refrigerant Oil From Compressor
Courtesy of GENERAL MOTORS CORP.
4. Measure and record the amount of oil drained from the removed compressor. This
measurement will be used during installation of the replacement compressor.
5. Properly discard the used refrigerant oil.
2008 Chevrolet Silverado 1500
2008 HVAC Heating, Ventilation, and Air Conditioning - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Balancing Procedure
Fig. 6: Draining A/C Refrigerant Oil From Compressor
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: The refrigerant oil in the A/C system must be balanced
during compressor replacement.
2008 Chevrolet Silverado 1500
2008 HVAC Heating, Ventilation, and Air Conditioning - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
1. Before installing the compressor, the refrigerant oil will have to be fully drained.
2. Add back the same quantity of polyalkylene glycol (PAG) oil as drained from the removed
compressor.
Refer to the amount of refrigerant oil recorded during the compressor removal.
AIR CONDITIONING COMPRESSOR REPLACEMENT (LY2, LY5, LH6, L76, L92 AND LMG)
Special Tools
J 39400-A Halogen Leak Detector. See Special Tools.
Removal Procedure
Fig. 7: A/C Belt Tensioner
Courtesy of GENERAL MOTORS CORP.
1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
2. Install a ratchet into the air conditioning (A/C) belt tensioner adapter opening.
2008 Chevrolet Silverado 1500
2008 HVAC Heating, Ventilation, and Air Conditioning - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
3. Remove the air cleaner resonator outlet duct. Refer to Air Cleaner Resonator Outlet
Duct Replacement .
4. Rotate the A/C belt tensioner clockwise in order to relieve the tension on the belt.
5. Remove the A/C belt from the A/C compressor.
6. Slowly release the tension on the A/C belt tensioner.
7. Remove the discharge hose bolt from the A/C compressor.
8. Remove the discharge hose from the A/C compressor.
9. Remove the suction hose bolt from the A/C compressor.
10. Remove the suction hose from the A/C compressor.
11. Discard the sealing washers. Cap all of the openings.
12. Disconnect the electrical connections.
2008 Chevrolet Silverado 1500
2008 HVAC Heating, Ventilation, and Air Conditioning - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
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