Have the refrigerant discharged by an automotive air conditioning technician. Disconnect the negative cable from the battery. Remove the drive belt from the compressor. On V6 models, remove the alternator. Detach the wiring connector and the refrigerant lines. Unbolt the compressor and lift it from the vehicle. If a new or rebuilt compressor is being installed, follow the directions that come with it regarding the proper level of oil prior to installation. Installation is the reverse of removal. Replace any O-rings with new ones specifically made for the purpose and lubricate them with refrigerant oil. Have the system evacuated, recharged, and leak tested by the shop that discharged it.