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Chevrolet Sonic Repair Manual: Front Side Door Lock Cylinder Coding (Non Free Wheeling)

Chevrolet Sonic Repair Manual / Body / Doors and Enclosures / Doors / Front Side Door Lock Cylinder Coding (Non Free Wheeling)


The door lock cylinder uses 8 of the 8?€‰cut positions. The tumbler positions

The door lock cylinder uses 8 of the 8?€‰cut positions. The tumbler positions are staggered from side to side, 4 on one side and 4 on the other, are not self-retaining, and are not snap in.

    Note:

    All lock cylinders for side milled keys have right and left tumblers. The location of the tooth of the tumbler determines whether it is right of left. Illustrations in this procedure show the right tumblers on the top and the left tumblers on the bottom. All tumblers are marked 1R, 1L, 2R, or 2L. The number being cut depth and the letter meaning right or left.

  1. Hold the door lock cylinder?€‰(1) so the side with the 4?€‰tumbler spring pockets faces up, pocket nearest to the cylinder head.
  2. Insert the tumbler springs?€‰(2) into the 4?€‰spring pockets. This side uses left tumblers.
  3. Install the tumbler?€‰(3) for key cut position one in the slot nearest to the front of the lock cylinder. Install the remaining tumblers, key cut positions 3, 5, and 7, following the key code and same process. Press the tumblers in place until they are secure.
  4. Check the correct loading of the tumblers by inserting the key into the cylinder. All tumblers should be flush with the lock cylinder body.
  5. Turn the cylinder so the side with the 4?€‰tumbler spring wells faces up. This side uses right tumblers.
  6. Insert the tumbler springs into the 4?€‰spring pockets.
  7. The first tumbler closest to the front of the lock cylinder to be loaded will be the second key cut position, the second number in the key code. Install the remaining tumblers for the key cut positions 4, 6, and 8. Press the tumblers in place until they are secure.
  8. Check the correct loading of the tumblers by inserting the key into the cylinder. All tumblers should be flush with the lock cylinder body.
  9. Insert the key and lightly lubricate the cylinder body diameter and tumbler surfaces and a small amount in the head of the cylinder using the supplied grease.
  10. Insert the sleeve?€‰(4) onto the cylinder assembly.
  11. Insert the assembly into the case?€‰(5).
  12. With the lock cylinder assembly installed in the case?€‰(5), install the retainer?€‰(6) and stake the retainer in place using a small punch and hammer to peen the case material onto the exposed ends of the installed retainer?€‰(6).
  13. Insert the key into the lock and function the lock to check for proper assembly and smooth operation.
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