Ignition Lock Cylinder

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

The ignition lock cylinder performs all of the functions of a lock cylinder on a non PASS-Key III+ equipped vehicle. The ignition lock cylinder for vehicles with PASS-Key III+ may be located on the steering column or on the instrument panel. In either location, the exciter coils surround the ignition lock cylinder such that they are very close to the head of the key which contains the transponder pellet.

If an ignition lock cylinder is replaced, the new ignition lock cylinder must be coded to match the mechanical coding of the PASS-Key III+ keys. When replacing an ignition lock cylinder, and new PASS-Key III+ keys are required, the new keys must be learned by the theft deterrent module (TDM). Refer to Replacing Keys (North America except Canada) or Replacing Keys (Canada) .