Assembling and Coding IP Storage Compartment Lock Cylinder

The IP storage compartment lock uses five tumbler positions 7-10. The IP storage compartment lock cylinder also uses a retainer tumbler. The retainer tumbler is not moved by the key. The purpose of the retainer tumbler is to retain the lock cylinder in the lock. 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: Identifying IP Storage Compartment Lock Cylinder Components
Courtesy of GENERAL MOTORS CORP.
1. Hold the cylinder (4) so that the side with five tumbler openings is facing up.
2. Insert tumbler springs (2) into the five 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 for positions 8, 9 and 10 into the cylinder.
5. Firmly press the tumblers until they snap in place.
6. Insert the key into the lock cylinder (4). If the tumblers are not flush with the lock cylinder, remove the tumblers and perform the coding procedure again.