GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 Yukon XL - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E 🢒 Park Pawl and Actuator Replacement

Removal Procedure
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the oil pan and filter. Refer to Automatic Transmission Fluid and Filter Replacement .
  3. Remove the park/neutral position switch. Refer to Park/Neutral Position Switch Replacement .

    4. Object Number: 43309 Size: SH
  4. Remove the manual shaft nut and the pin.
  5. Remove the detent lever and the actuator assembly.
  6. Remove the bolts and the parking pawl bracket.
  7. Remove the parking pawl return spring.

    8. Object Number: 43307 Size: SH
  8. Use the modified screw extractor in order to remove the plug.
  9. Remove the parking pawl shaft retainer, the shaft and the pawl.

    10. Important: If the manual shaft binds in the case during removal, file or sand the shaft in the area adjacent to the detent lever.

  10. Remove the manual shaft.
  11. Remove the manual shaft seal.

Installation Procedure

    Object Number: 43307 Size: SH
  1. Install the pawl shaft.
  2. Install the parking pawl.
  3. Install the plug using a 8 mm or (5/16 inch) rod with Loctite® or the equivalent.
  4. Install the retainer.

    5. Object Number: 43309 Size: SH
  5. Install the pawl return spring.
  6. Install the detent lever to the actuator assembly.
  7. Install actuator assembly over the parking pawl.
  8. Install the manual shaft seal.
  9. Lubricate the manual shaft with transmission oil and install the manual shaft into the case.
  10. Install the nut on the shaft.
  11. Install the roll pin.

    12. 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.

  12. Install the parking lock bracket with the two bolts.

    13. Tighten
    Tighten the bolts to 24 N·m (18 lb ft).

  13. Install the park/neutral position switch. Refer to Park/Neutral Position Switch Replacement .
  14. Install the oil pan and filter. Refer to Automatic Transmission Fluid and Filter Replacement .
  15. Lower the vehicle.
  16. Fill the transmission to the proper level with Dexron® III transmission fluid. Refer to Transmission Fluid Check .