The accumulator should be replaced whenever the compressor is replaced. First, discharge the system. Next, disconnect the negative battery cable from the battery, ensuring that the lockout feature on models equipped with the Delco Loc II audio system is turned off before disconnecting the battery. Set the parking brake and block the rear wheels, then raise the front of the vehicle and support it securely on jackstands. Remove the right lower splash shield, followed by the drivebelt and oil filter if necessary for clearance. Disconnect the compressor clutch wiring harness and the refrigerant lines from the rear of the compressor, plugging the open fittings to prevent dirt and moisture entry. Unbolt the compressor from the mounting brackets and lift it out of the vehicle, removing the three front compressor retaining bolts and the two rear bolts and bracket. If installing a new compressor, follow the directions regarding draining excess oil prior to installation, and transfer the clutch from the original to the new compressor if needed. Installation is the reverse of removal; replace all O-rings with new ones specifically made for A/C system use and lubricate them with refrigerant oil. Finally, have the system evacuated, recharged, and leak tested by the shop that discharged it.