Assembling and Coding the IP Compartment Door Lock Cylinder

The IP compartment door lock cylinder uses 4 of the ten cut positions 7-10. The retainer tumbler position is adjacent locations with all four tumblers (3) located on the same side. A stainless steel retaining tumbler is used in the IP compartment door lock cylinder to retain the lock cylinder in the latch assembly and does not move when the key is inserted. The retainer tumbler occupies the slot closest to the head of the cylinder assembly (1) and comes pre-installed in the cylinder.

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.
   Fig 1: Inserting Tumbler Springs Into 4 Spring Wells

   Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying Key Cutting Depths
Courtesy of GENERAL MOTORS CORP.
3. The first tumbler to be loaded will be key cut position Number 7. Determine the cut depth at this position and install the corresponding tumbler (1) into the slot nearest to the front of the lock cylinder (3).
4. Install the three remaining tumblers, key cut positions 8, 9 and 10, into the cylinder.
5. Snap the tumblers into place with light hand pressure.
Fig 3: Inspecting For Correct Loading Of The Tumblers By Inserting Key Into Cylinder
Courtesy of GENERAL MOTORS CORP.
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.

The IP compartment door lock cylinder uses four of the ten cut positions 7-10. The retainer tumbler position is adjacent locations with all four tumblers (1) located on the same side. A stainless steel retaining tumbler is used in the IP compartment door lock cylinder to retain the lock cylinder in the latch assembly and does not move when the key is inserted. The retainer tumbler occupies the slot closest to the head of the cylinder assembly (3) and comes pre-installed in the cylinder.

Fig 1: Inserting Tumbler Springs Into Four Spring Wells
Courtesy of GENERAL MOTORS CORP.
1. Hold the cylinder (3) so that the side with four tumbler spring wells is facing up.
2. Insert tumbler springs (2) into the four spring wells.
Fig 2: Identifying Key Cutting Depths
Courtesy of GENERAL MOTORS CORP.
3. Install the tumbler (1) for key cut position 7 into the tumbler slot nearest to the front of the lock cylinder (3).
4. Install the three remaining tumblers, key cut positions 8, 9 and 10, into the cylinder.
Fig 3: Snapping Tumblers Into Place
Courtesy of GENERAL MOTORS CORP.
5. Snap the tumblers (1) into place with light hand pressure.
6. Inspect for the correct loading of the tumblers (3) by inserting the key into cylinder (1). All of the tumblers (1) should be flush with the lock cylinder (3).