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Assembling and Coding IP Storage Compartment Lock Cylinder

WARNING: This page is about a different car, the 2004 Pontiac Grand Am and 2004 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.

The IP storage compartment lock only uses 4 of the 10 cut positions 7-10. A retainer tumbler is used in the IP storage compartment lock to retain the lock cylinder in the latch assembly. This retainer tumbler is not moved by the key. The retainer tumbler occupies the slot closest to the head of the IP storage compartment lock cylinder and should come already installed in the cylinder.

    Fig 1: IP Storage Compartment Lock Cylinder, Tumbler Springs & Tumbler
    GM337395Courtesy of GENERAL MOTORS CORP.
  1. Hold the cylinder (3) so that the side with 4 tumbler spring wells is facing up.
  2. Insert tumbler springs (2) into the 4 spring wells.
  3. Install the tumbler (1) for key cut position 7 into the slot nearest to the front of the lock cylinder.
  4. Install the 3 remaining tumblers, key cut positions 8, 9 and 10, into the cylinder.
  5. Snap the tumblers into place with light hand pressure.
  6. Inspect for the correct loading of the tumblers (1) by inserting the key into cylinder (3). All of the tumblers should be flush with the lock cylinder.