G6 2005-2007

Removal & Installation

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Steering Gear



  1. Raise and support the vehicle safely and remove the front wheels.
  2.  
  3. Remove the intermediate shaft to steering gear pinch bolt. Discard the bolt.
  4.  
  5. Disconnect the intermediate shaft from the steering gear. Note the alignment for installation.
  6.  
  7. Disconnect the outer tie rod end from the steering knuckle.
  8.  
  9. Remove the steering gear-to-frame bolts.
  10.  
  11. Remove the steering gear through the left side of the vehicle. Rotate the gear 90 degrees in order to clear the rear transmission mount.
  12.  
  13. If replacing the steering gear, remove the outer tie rod ends.

    Click image to see an enlarged view

    Fig. Electronic power steering gear mounting-G6

  14.  

To install:

  1. Install the outer tie rod ends to the steering gear, if removed.
  2.  
  3. Install the steering gear to the vehicle. Rotate the gear as necessary to clear the rear transmission mount.
  4.  
  5. Install the steering gear-to-frame bolts and tighten to 52 ft. lbs. (70 Nm), plus an additional 90 degrees.
  6.  
  7. Connect the intermediate steering shaft to the steering gear using the alignment mark.
  8.  
  9. Install the intermediate steering shaft to steering gear pinch bolt and tighten to 36 ft. lbs. (49 Nm).
  10.  
  11. Connect the outer tie rod ends to the steering knuckle.
  12.  
  13. Install the wheels.
  14.  
  15. Lower the vehicle.
  16.  
  17. Check the front wheel alignment.
  18.  

Steering Motor





Click image to see an enlarged view

Fig. Electronic steering motor mounting-G6

  1. Disconnect the sensor wire harness (6) from the motor/module assembly (5).
    NOTE
    If replacing the motor/module assembly, you will need the sensor wire harness strap clip (7) for the new motor/module assembly installation. If replacing the steering column, a new sensor wire harness strap clip (7) will come with the column service kit. Keep the existing wire strap clip attached to the steering column sensor wire harness (6).

  2.  
  3. Use needle nose pliers to remove the wire strap clip (7) from the motor/module assembly (5).
  4.  
  5. Use an M6x1 head bit to remove the 2 motor/module assembly TORX® screws (2). Discard the screws.
    NOTE
    Once the motor/module assembly has been removed, inspect the steering column assist mechanism input shaft (3) for the rotor isolator bumper (4). If present, remove and insert back into the rotor isolator (8) in the motor/module assembly (5). The assist mechanism housing must be free of any type of debris. Remove any loose debris from the steering column assist mechanism housing, but do NOT remove the remaining grease on the steering column assist mechanism input shaft (3).

  6.  
  7. Grasp the motor/module assembly (5) by the motor housing and remove it from the steering column (1) by pulling with an even tension.
  8.  

To install:

Click image to see an enlarged view

Fig. Electronic steering rotor isolator installation-G6


NOTE
Before installing the motor/module assembly (2), verify the rotor isolator bumper (1) is installed into the rotor isolator (3) in the motor/module assembly (2).

  1. Fit the motor/module assembly rotor isolator over the steering column assist mechanism input shaft.
  2.  
  3. Use an M6x1 TORX® head bit to attach the motor/module assembly (2) to the steering column with the 2 new TORX® bolts (1).
  4.  
  5. Tighten the steering column bolts to 80 inch lbs. (9 Nm).
  6.  
  7. Connect the sensor wire harness (3) to the motor/module assembly (2).
  8.  
  9. Install the sensor wire harness strap clip (4) into the motor/module assembly (2).
  10.  
  11. Perform the control module setup procedure.
  12.  

Control Module Setup

After replacing the power steering motor and module assembly the following 3 procedures must be performed. After replacing the steering column assembly only the steering position sensor and the torque sensor calibration procedures must be performed. The steering position sensor and torque sensor calibration procedures should also be performed after a suspension alignment.


NOTE
The power steering control module (PSCM) must be setup using the service programming system (SPS). There are 8 different tuning profile calibrations stored in the PSCM. The SPS will select the correct tuning profile calibration for this vehicle. Setup the PSCM to use that profile. If the PSCM has not been setup, the scan tool will display the Tuning Profile is 0 in the EPS data list, and DTC C0551 will set.

Steering Position Sensor Calibration
  1. Install the scan tool.
  2.  
  3. Turn on the ignition, with the engine off.
  4.  
  5. Center the steering wheel.
  6.  
  7. With the scan tool select Special Functions.
  8.  
  9. Select Steering Position Sensor Calibration and press the Enter key. The scan tool screen will flash Calibration in Progress.
  10.  
  11. When done, the scan tool will display Calibration Complete.
  12.  
  13. Press the exit key.
  14.  
  15. Use the scan tool in order to clear the DTCs.
  16.  
  17. When done, the scan tool will display Calibration Complete.
  18.  
  19. Press the exit key.
  20.  
  21. Use the scan tool in order to clear the DTCs.
  22.  
  23. After turning off the ignition, allow 25 seconds of wait time before performing any procedures that require the vehicles battery to be disconnected, or module memory loss may occur.
  24.  
  25. Turn off the ignition.
  26.  

Steering Tuning Selection
  1. Install the scan tool.
  2.  
  3. Turn on the ignition, with the engine off.
  4.  
  5. With the scan tool select Special Functions
  6.  
  7. Select Steering Tuning Selection and press the enter key. The scan tool screen will flash Selection in Progress.
  8.  
  9. When done the scan tool will display Selection Complete.
  10.  
  11. Press the exit key.
  12.  
  13. Use the scan tool in order to clear the DTCs.
  14.  
  15. After turning OFF the ignition, allow 25 seconds of wait time before performing any procedures that require the vehicles battery to be disconnected, or module memory loss may occur.
  16.  
  17. Turn off the ignition.
  18.  

Torque Sensor Calibration
  1. Install the scan tool.
  2.  
  3. Turn on the ignition, with the engine off.
  4.  
  5. Center the steering wheel.
  6.  
  7. After centering the steering wheel, remove hands and other objects from the steering wheel and ensure the suspension is relaxed and no bias, or uneven force is being applied to the steering system.
  8.  
  9. With the scan tool select Special Functions.
  10.  
  11. Select Torque Sensor Calibration and press the Enter key. The scan tool screen will flash Calibration in Progress.
  12.  
  13. When done, the scan tool will display Calibration Complete.
  14.  
  15. Press the exit key
  16.  
  17. Use the scan tool in order to clear the DTCs
  18.  
  19. After turning off the ignition, allow 25 seconds of wait time before performing any procedures that require the vehicles battery to be disconnected, or module memory loss may occur.
  20.  
  21. Turn off the ignition.
  22.  

 
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