Colorado 4WD L5-3.7L (2007)
2. Starting with position 1, insert the tumblers (4) into their corresponding slots in the coded order.
3. Using your fingers, pull out the side bar (3) until the tumblers fall completely into place.
4. Insert one tumbler spring (2) above each tumbler (4).
5. Lubricate the tumblers using Superlube(R) GM P/N 12346241 or equivalent.
6. Insert the spring retainer (1) prongs into the slots at the end of each cylinder.
7. Press down the retainer (1) until fully seated in the depression.
8. Inspect for proper tumbler installation:
1. Hold the spring retainer (2) in position.
2. Insert the key (1) into the cylinder.
3. The side bar (3) should drop down flush with the cylinder diameter if properly installed.
4. Disassemble and assemble properly as needed.
9. Remove the key.
10. Secure the cylinder in the J41340.
1. Inspect that the spring retainer is facing up and positioned directly under the punch slots.
2. Push the cylinder into the J41340 until butted with the cylinder bezel.
3. Tighten the holding screw.
