Silverado 2008

Power Rack & Pinion Steering Gear

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
    NOTE
    When performing service on or near the SRS components, or SRS wiring the SRS must be disabled. Failure to observe the correct procedure could cause deployment of the SRS components. Serious injury can occur.

  2.  
  3. Position the steering wheel so the front wheels are in the straight ahead position.
  4.  
  5. Be sure the ignition switch is in the OFF position.
  6.  
  7. Disconnect the negative battery cable.
    NOTE
    The SDM may have more than one fused power input. To ensure that there is no unwanted SRS deployment, personal injury, or unnecessary SRS system repairs, remove all fuses supplying power to the SDM. With all SDM fuses removed and the ignition switch in the ON position, the AIR BAG warning indicator will illuminate. This is normal and does not indicate a SRS system malfunction.

  8.  
  9. Locate and remove the fuses supplying power to the SDM.
  10.  
  11. Wait one minute before working on the vehicle.
  12.  
  13. Install tool J42640 into the steering column lower access hole. Lock the steering column.

    Click image to see an enlarged view

    Fig. Steering column anti-rotation pin tool J42640 installation

  14.  
  15. Remove as much power steering fluid from the reservoir as possible.
  16.  
  17. Remove or disconnect the following:

    Wheel assemblies
     
    Engine shield, if equipped

    Click image to see an enlarged view

    Fig. Skid plate and related components-type one



    Click image to see an enlarged view

    Fig. Skid plate and related components-type two



    Click image to see an enlarged view

    Fig. Disconnecting the upper intermediate shaft

     
    Coupler clamp bolt from the intermediate shaft
     
    Outer tie rod ends from steering knuckle
     
    Power steering high and low pressure line retaining plate
     
    Power steering high and low pressure lines, then plug them to prevent leakage and contamination
     
    Rack and pinion assembly mounting nuts, washers and bolts
     
    Rack and pinion assembly from the vehicle

    Click image to see an enlarged view

    Fig. Power steering gear and related components-rack and pinion

     

  18.  

To install:


NOTE
Be sure to use new fasteners, as required.

  1. Install or connect the following:

    Rack and pinion assembly into the vehicle
     
    Rack and pinion assembly mounting bolts, washers and nuts. Tighten the left side bolts to 148 ft. lbs. (200 Nm) and the right side bolts to 74 ft. lbs. (100 Nm).
     
    Intermediate shaft to the rack and pinion assembly
     
    Coupler clamp bolt to the intermediate shaft. Tighten the bolt to 33 ft. lbs. (45 Nm).
     
    Low pressure line and high pressure line. Tighten the retaining plate to 106 inch lbs. (12 Nm)
     
    Outer tie rod ends
     
    Engine protection shield, if equipped
     
    Wheels
     

  2.  
  3. Lower the vehicle.
  4.  
  5. Fill and bleed the power steering system.
  6.  

 
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