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Home >> Buick >> 2021 >> Envision Preferred, AWD >> Repair and Diagnosis >> Steering >> Power Steering System >> Repair Instructions >> Power Steering Assist Motor Replacement >> Installation Procedure
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Installation Procedure

  1. GM5482174Courtesy of GENERAL MOTORS COMPANY

    Steering Gear Drive Coupling (1) - Install NEW

  2. GM5482186Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Only use General Motors approved room temperature vulcanizing sealant (RTV). Failure to use GM approved products may result in insufficient motor to gear sealing, allowing water intrusion which may lead to rack and pinion steering gear failure and require replacement of the rack and pinion steering gear.

    CAUTION:

    Do not over apply room temperature vulcanizing sealant (RTV). Excessive RTV increases the chance of the RTV to come into contact with the coupler or gear causing rack and pinion steering gear failure, requiring replacement of the rack and pinion steering gear.

    NOTE:

    Only perform the procedure with the RTV and steering gear assembly at room temperature (between 18-40°C). RTV air exposure time is 8 minutes and the following steps must be done within that time frame. Failure to assemble within the 8 minute time frame will cause improper sealing of the power steering assist motor to the electric dual pinion rack and pinion steering gear sealing surface causing the need to repeat cleaning the electric dual pinion rack and pinion steering gear/power steering assist motor sealing surfaces and installation steps 2 - 6.

    Apply a 3 mm (0.11 inch) continuous bead of RTV to the motor assembly (1) and follow the outline of the motor valley starting at the area indicated (2). Do NOT apply into the motor valley. RTV should be applied only to the outer edge of the motor valley outline. Adhesives, Fluids, Lubricants, and Sealers 

  3. Do not allow RTV to skim over. Power steering assist motor must be installed within 8 minutes of RTV being applied.
  4. GM4780983Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

    NOTE:

    The steering gear drive coupling and assist motor armature should be aligned with the gear inside of the steering gear housing to aid in installation, otherwise interference MAY occur.

    Position the power steering assist motor (2) with the steering gear housing and start the 2 NEW power steering assist motor bolts (1).

  5. With the 2 NEW power steering assist motor bolts (1) started, completely install the power steering assist motor (2) to the steering gear housing.
    6. CAUTION:

    Refer to Fastener Caution .

  6. Power Steering Assist Motor Bolt (1) - Install NEW and tighten [2x] 21 N.m (15 lb ft)
  7. GM4781195Courtesy of GENERAL MOTORS COMPANY

    Connect the electrical connector (1) to the power steering assist motor.

  8. Verify connector (1) is fully seated by lightly pulling on the connector.
  9. GM4780891Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    If the connector position assurance lock (1) was damaged during removal, DISCARD it and skip step 9.

    Install the connector position assurance lock (1) into the electrical connector (2) until fully seated.

  10. Electric Dual Pinion Rack and Pinion Steering Gear - Install - Electric Dual Pinion Rack and Pinion Steering Gear Replacement 
  11. Transfer the key cycle count from the OLD steering gear control module to the NEW steering gear control module. Control Module References
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