Before servicing the vehicle, refer to the Precautions Section.
NOTEDisconnecting the negative battery cable on some vehicles may interfere with the functions of the on-board computer systems and may require the computer to undergo a relearning process, once the negative battery cable is reconnected.
NOTEIf working near and/or around the SRS system and components, be sure to properly disable the SRS system. See disarming/arming the SRS system.
NOTEFor vehicles equipped with OnStar (RPO UE1), with battery backup, the backup battery is a redundant power supply to allow limited ONStar functionality in the event of a main battery power disruption to the OnStar module (VCIM). Do not disconnect the main vehicle battery or remove the OnStar fuse with the ignition key in any position other than OFF. Retained accessory power should be allowed to time out or be disabled by opening the driver-s side door before disconnecting power. Disconnecting power to the module in any way while the ignition is ON or with the retained accessory power activated may cause activation of the OnStar backup battery system and will discharge and permanently damage the backup battery. Once the backup battery is activated it will stay on until it has completely discharged. The backup battery is not rechargeable and once it is activated, it must be replaced.
- Disconnect the negative battery cable.
- Remove the brake modulator valve bracket nut from the gear, 1994-1996 vehicles.
- Raise and safely support the vehicle.
- Position a catch pan under the steering gear assembly to catch used fluid. Be sure to properly dispose of used fluid.
- Disconnect and plug the fluid lines.
Remove the pinch bolt and disconnect the flex coupling from the gear.
NOTEFailure to disconnect the coupling from the gear stub shaft may result in damage to the steering gear and intermediate shaft. This damage can cause loss of steering control with could result in vehicle crash and bodily injury.
- Remove the nut and washer from the pitman arm. Using a pitman arm puller separate the pitman arm from the steering gear.
- Remove the steering gear retaining bolts.
Remove the steering gear from its mounting.
Be sure to use new fasteners, as required.
Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread sealer are identified. Do not use paints, lubricants or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners.
- Installation is the reverse of the removal procedure.
- Be sure to position the gear to the frame rail so that the gear aligns with the intermediate shaft and three frame holes.
Tighten the mounting bolts to 64ft. lbs.
- Be sure to fill the system with the proper grade and type power steering fluid.
- Bleed the system.
- Using the GM diagnostic scan tool or aftermarket equivalent reprogram the necessary systems and components. Be sure to follow the scan tool manufacturer-s directions.