GM Service Manual Online
For 1990-2009 cars only

Rear Compartment and Liftgate Lock Cylinder Coding Sedan

Dissassembly Procedure


    Object Number: 892444  Size: SH
  1. Unhook return spring from case and pawl.
  2. Remove cap from lock cylinder by inserting thin blade screwdriver between cap and case and carefully prying cap from case.
  3. Important: When shutter is removed, the shutter springs may fall out.

  4. Remove shutter and shutter springs.

  5. Object Number: 892443  Size: SH
  6. Insert key and rotate a quarter turn clockwise. Slide cylinder from housing.
  7. Remove return spring and pawl from case.

  8. Object Number: 892445  Size: SH
  9. Remove key and push tumblers out of lock cylinders using a thin bladed screwdriver.
  10. If necessary, remove sidebar assembly by pushing it inward while tapping the cylinder, causing it to fall out.

Assembly Procedure


    Object Number: 863019  Size: SH
  1. Select the correct tumblers for the desired code by the number stamped on the tumbler.

  2. Object Number: 892445  Size: SH

    Important: Make sure sidebar and tumbler springs are in place before installing tumblers.

  3. Install tumblers by applying downward pressure until they lock into place.

  4. Object Number: 892443  Size: SH

    Important: When key is inserted into properly coded lock cylinder, all tumblers except the retainer tumbler will be flush with the lock cylinder.

  5. Install pawl and return spring into case.
  6. Insert key into cylinder, insert cylinder into housing and rotate quarter turn counterclockwise.

  7. Object Number: 892444  Size: SH
  8. Install shutter springs and shutter.
  9. Install cap to lock cylinder.
  10. Hook return spring to pawl and case.

Rear Compartment and Liftgate Lock Cylinder Coding Wagon

Dissassembly Procedure


    Object Number: 892453  Size: SH
  1. Remove the E-clip at rear of the lock cylinder and remove the pawl.

  2. Object Number: 892455  Size: SH
  3. Remove the switch lever and the return spring.

  4. Object Number: 892459  Size: SH
  5. Compress the inside snap ring and remove. Remove the washer plate and the compression spring.
  6. Remove lock cylinder from the liftgate the lock cylinder housing.

  7. Object Number: 892482  Size: SH
  8. Remove cap and gasket from lock cylinder.
  9. Important: When the shutter is removed, the shutter springs may fall out.

  10. Remove the shutter and the shutter springs.

  11. Object Number: 892460  Size: SH
  12. Insert the key into the cylinder, turn it a quarter turn clockwise and remove the cylinder from the housing.
  13. Important: When the tumblers are removed from the lock cylinder tumbler, the springs may fall out.

  14. Push the tumblers out of the lock cylinder using a thin bladed screwdriver.
  15. If necessary, remove the sidebar assembly by pushing it inward while tapping the cylinder causing it to fall out.

Assembly Procedure


    Object Number: 863019  Size: SH
  1. Select the correct tumblers for the desired key code by the number stamped on the tumbler.

  2. Object Number: 892636  Size: SH

    Important: Make sure sidebar and tumbler springs are in place before installing tumblers.

  3. Install the tumblers by applying a downward pressure until they lock into place.
  4. To check the coding of the cylinder, insert a key. If the coding is correct, the tumblers will be flush with the cylinder with the key inserted.
  5. For assembly, oil the lock set with a light oil or a graphite lubricant.
  6. Insert lock cylinder with key into cylinder housing, turn it a quarter turn counter clockwise to lock it into place

  7. Object Number: 892482  Size: SH
  8. Install shutter, shutter springs, cap and gasket.

  9. Object Number: 892459  Size: SH
  10. Install the lock cylinder into the liftgate lock cylinder housing.
  11. Install the compression spring, washer plate, and the snap ring

  12. Object Number: 892513  Size: SH
  13. Install the switch lever into the lock cylinder housing.
  14. Place one leg of the return spring into the slot between the switch lever and the plastic housing.

  15. Object Number: 892515  Size: SH
  16. Align the pawl so the top leg of the return spring slides into the slot in the pawl.

  17. Object Number: 892516  Size: SH
  18. Rotate the pawl counter clockwise in the lock latch cylinder housing. If done properly, the keyway in the pawl will slide down over the key on top of lock cylinder.
  19. Install the E-clip at rear of lock cylinder.