Air Conditioning Compressor Replacement (HP2)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Air Conditioning Compressor (HP2)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed. The High Voltage Disabling procedure will perform the following tasks: Identify how to disable high voltage. Identify how to test for the presence of high voltage. Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed. Failure to follow the procedures exactly as written may result in serious injury or death. CAUTION: This A/C system's high voltage A/C Compressor uses Polyolester (POE) refrigerant oil instead of Polyalkylene Glycol (PAG) refrigerant oil. Use only approved GM POE oil no more than two hours after removal from its sealed moisture proof packaging (reference GM POE label for proper usage) in refrigerant systems equipped with a High Voltage A/C compressor. GM POE oil is intended to be used with the GE-45037-A A/C oil injector and the GE-48997 A/C POE oil injector hose. Use of any refrigerant oil other than the approved GM POE, handled and installed per GM's requirements may result in compressor failure and/or loss of HV isolation with associated DTC's set. Preliminary Procedures Disable hybrid high voltage system. Refer to High Voltage Disabling , and High Voltage Enabling . Recover the refrigerant. Refer to Refrigerant Recovery and Recharging (Non-HP2) , Refrigerant Recovery and Recharging (HP2) . Remove the air cleaner. Refer to Air Cleaner Assembly Replacement . Remove the air cleaner resonator outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement . Remove the suction hose. Refer to Suction Hose Replacement (W/C69) , Suction Hose Replacement (W/O C69-HP2) , Suction Hose Replacement (W/O C69) , Suction Hose Replacement (W/C69-HP2) . Remove the discharge hose. Refer to Discharge Hose Replacement (LY2, LMF, L76 and L92) , Discharge Hose Replacement (HP2) . Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the engine shield. Refer to Engine Shield Replacement . Remove the oil pan skid plate. Refer to Oil Pan Skid Plate Replacement (1500 with RPO NZZ) , Oil Pan Skid Plate Replacement (2500/3500 with RPO NZZ) .
1	A/C Compressor Cable Bolt (Qty: 2) CAUTION: High Voltage (HV) cables should never be removed from the mounting block. Removal of the individual HV cable from the mounting block may result in HV cable and/or component damage from improper: Cable sealing Electrical shielding Terminal position assurance CAUTION: Refer to Fastener Caution . Tighten 9 N.m (80 lb in)
2	A/C Compressor Cable Mounting Bolt (Qty: 2) Tighten 9 N.m (80 lb in)
3	A/C Compressor Cable
4	A/C Compressor Seal Procedure Remove and discard the seal.
5	A/C Compressor Bolt (Qty: 3) Tighten 50 N.m (37 lb ft)
6	A/C Compressor Procedure Disconnect three wire low voltage electrical connector from compressor. Insert bottom compressor bolts into compressor before installing compressor to vehicle. Reprogram A/C compressor. Refer to Air Conditioning Compressor Control Module Programming and Setup . Use only GM approved Polyolester (POE) oil. Failure to use the approved GM POE oil per GM's handling and installation requirements may result in compressor failure and/or loss of High Voltage isolation with the associated DTC's set. When replacing the A/C compressor, balance the compressor oil. Refer to Air Conditioning Compressor Oil Balancing (Non-HP2) , Air Conditioning Compressor Oil Balancing (HP2) . Using J 39400 Electronic Halogen Leak Detector, leak test A/C compressor fittings. Special Tools J 39400 Electronic Halogen Leak Detector