Envoy, Rainer, Trailblazer 2006-2007

Removal & Installation

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4.2L Engine



  1. Remove the air cleaner assembly.
  2.  
  3. Remove the drive belt.
  4.  
  5. Install a drain pan under the vehicle.
  6.  
  7. Disconnect the power steering pressure hose from the power steering pump.
  8.  
  9. Disconnect the power steering cooler hose from the power steering pump.
  10.  
  11. Disconnect the wiring harness from the wiring loom on the power steering pump.
  12.  
  13. Remove the power steering pump mounting bolts.
  14.  
  15. Remove the power steering pump.
  16.  
  17. Remove the power steering pump pulley.
  18.  
  19. Remove the power steering pump pulley using Power Steering Pump Pulley Remover tool no. J 25034-C, or equivalent.
  20.  

To install:

  1. Install the power steering pump pulley, as follows:
    1. Install the power steering pump pulley to the end of the power steering pump shaft.
    2.  
    3. Install the power steering pump pulley to the power steering pump using Power Steering Pump Pulley Installer tool no. J 25033-C, or equivalent.
    4.  
    5. Install the power steering pump pulley (1) flush against the end of the power steering pump shaft (2), with an allowable variance of 0.010 in. (0.25mm).

      Click image to see an enlarged view

      Fig. Install the power steering pump pulley (1) flush against the end of the power steering pump shaft (2), with an allowable variance of 0.010 in. (0.25mm)

    6.  

  2.  
  3. Install the power steering pump.
  4.  
  5. Install the power steering pump mounting bolts. Tighten the power steering pump mounting bolts to 18 ft. lbs. (25 Nm).
  6.  
  7. Install the power steering cooler hose to the power steering pump.
  8.  
  9. Install the power steering pressure hose to the power steering pump. Tighten the power steering pressure hose to 18 ft. lbs. (25 Nm).
  10.  
  11. Remove the drain pan from under the vehicle.
  12.  
  13. Install the drive belt.
  14.  
  15. Install the air cleaner assembly.
  16.  
  17. Bleed the power steering system.
  18.  
  19. Inspect the power steering system for leaks and the hoses for clearance away from the frame and other components.
  20.  

5.3L & 6.0L Engines



  1. Remove the drive belt.
  2.  
  3. Remove the PCM from PCM mounting bracket and move to the side.
  4.  
  5. Remove the power steering pressure hose from power steering pump.
  6.  
  7. Remove the power steering pump return hose from power steering pump.

    Click image to see an enlarged view

    Fig. Remove the power steering pressure hose (1) and return hose (3) from power steering pump (2)

  8.  
  9. Remove the power steering pump mounting bolts.
  10.  
  11. Remove the power steering pump.
  12.  
  13. Remove the power steering pump pulley, as follows:
    1. Secure the power steering pump in a vise, taking care not to damage the power steering reservoir.
    2.  
    3. Using Power Steering Pump Pulley Removal Tool J 25034-C, or equivalent, remove the power steering pump pulley.
    4.  

  14.  
  15. If applicable, remove the power steering pump reservoir.
  16.  

To install:

  1. If applicable, install the power steering pump reservoir.
  2.  
  3. Install the power steering pump pulley, as follows:
    1. Install the power steering pump pulley to the end of the power steering pump shaft.
    2.  
    3. Install the power steering pump pulley to the power steering pump using Power Steering Pump Pulley Installer tool no. J 25033-C, or equivalent.
    4.  
    5. Install the power steering pump pulley (1) flush against the end of the power steering pump shaft (2), with an allowable variance of 0.010 in. (0.25mm).

      Click image to see an enlarged view

      Fig. Install the power steering pump pulley (1) flush against the end of the power steering pump shaft (2), with an allowable variance of 0.010 in. (0.25mm)

    6.  

  4.  
  5. Align the power steering pump with mounting bolt holes on engine block.
  6.  
  7. Install the power steering pump mounting bolts. Tighten the bolts to 18 ft. lbs. (25 Nm).
  8.  
  9. Attach the power steering pump return hose to power steering pump.
  10.  
  11. Attach the power steering pump pressure hose to power steering pump.
  12.  
  13. Tighten the fittings to 18 ft. lbs. (25 Nm).
  14.  
  15. Install the PCM to PCM mounting bracket.
  16.  
  17. Install the drive belt.
  18.  
  19. Bleed the power steering system.
  20.  

 
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