GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 GMC C Sierra - 2WD 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Park/Neutral Position Switch Replacement

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the external wiring harness from the PNP switch.

    2. Object Number: 658996 Size: SH
  2. Disconnect the shift linkage/cable from the shift lever (2) on the selector shaft (4).
  3. Use wrench (1) to prevent the shift lever (2) from rotating. Remove nut (3) from the end of the selector shaft (4). Carefully remove the shift lever (2) from selector shaft (4).
  4. Remove the two bolts (6). Remove the PNP switch (5) by sliding it outward over the selector shaft (4).

    5. Important: If the park/neutral position switch did not easily slide off the selector shaft, use a file to remove any burrs or raised metal where the selector lever was seated against the shoulder of the selector shaft.

Installation Procedure

    Object Number: 658997 Size: SH
  1. Be sure that the neutral assurance bracket (2) is in the proper position on PNP switch (1).
  2. Make sure the selector shaft is in the N (Neutral) position as follows:
    3. • Place a wrench on the selector shaft flats and rotate the shaft to its furthest clockwise position.
    • Rotate the selector shaft counter-clockwise two detents.

    Object Number: 658998 Size: SH
  3. Align the PNP switch (5) with the main housing so that the neutral assurance bracket is facing outward.
  4. While maintaining the correct PNP switch-to-selector-shaft alignment, slide the new PNP switch (5) over the selector shaft (4).

    5. Notice: 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 locking compound or sealant are identified in the service procedure. 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 in order to avoid damage to parts and systems.

  5. While holding the neutral assurance bracket in engagement with the PNP switch, install the two bolts (6) so that the PNP switch may be rotated with some effort.

    6. Tighten
    Tighten the two bolts (6) to 27 N·m (20 lb ft).

  6. Remove and discard the neutral assurance bracket.

    7. Object Number: 658998 Size: SH

    Notice: 

       • DO NOT drive the selector lever onto the selector shaft.
       • DO NOT use an impact wrench in order to tighten the selector lever nut. Hold the lever with a wrench while tightening the nut.
       • Failure to follow these instructions may result in transmission damage.

    Notice: 

       • DO NOT drive the selector lever onto the selector shaft.
       • DO NOT use an impact wrench in order to tighten the selector lever nut. Hold the lever with a wrench while tightening the nut.
       • Failure to follow these instructions may result in transmission damage.

  7. Reinstall shift lever (2). Install nut (3), by hand, on the end of selector shaft (4). Use a wrench (1) to keep the shift lever from rotating.

    8. Tighten
    Tighten nut (3) to 24 N·m (18 lb ft).

  8. Reconnect the shift selector linkage/cable to the shift lever (2).
  9. Connect the external wiring harness to the PNP switch.