2004 2012 GM Passlock Ignition.
Will not start?
Engine cranks but no start?
Engine cranks before key inserted?
This video shows a simpler method to replace the problem, not the entire ignition cylinder.

Skill Level
Easy

Project Vehicle:
Make: Chevrolet
Model: Colorado
Year: 2007
Engine: 2.9L


Tools Needed:
Your Keys
T25Torx
Short Phillips

Project Time
1 hour or less

Project Cost
~$60


1. Attempt to start the truck by turning the key to crank the vehicle.
2. Observe that the vehicle fails to start and the security light is illuminated.
3. Release key to the ON/RUN position (DO NOT turn to ACC position or OFF)
4. Allow the vehicle to sit with key in the ON/RUN position for no less than 11
minutes. Security light will turn off after this.
5. When the light goes off, turn key to OFF position and allow the vehicle to
remain in the OFF position for no less than 30 seconds.
6. Repeat #1#5 for four cycles or until vehicle starts.