they have had problems with this here is what needs done to fix it i will look to see how to remove it from park manually also
#08-07-30-007B: EI08045 - Key Cannot Be Removed from Ignition with Gear Selector in Park, Shifter Cannot Be Moved from Park Position (Repair/Reroute Brake Transmission Shift Interlock (BTSI) Solenoid Harness) - (Jun 8, 2009)
This bulletin is being revised to end the need for information from the field and provide repair information. Please discard Corporate Bulletin Number 08-07-30-007A (Section 07 - Transmission/Transaxle).
Some customers may comment on either of the following conditions:
The key cannot be removed from the ignition.
The transmission gear selector (shifter) cannot be moved out of the PARK position.
This condition may be caused by an incorrectly routed brake transmission shift interlock (BTSI) solenoid harness which can make it difficult to install. In some instances, the wiring looms are tangled, causing stress on the wires in the connector at the BTSI. If the BTSI harness is routed incorrectly, it may also result in a wire pinching issue.
Important: DO NOT use force to move the gear selector (shifter). Using force may cause damage to the BTSI.
For vehicles repaired under warranty, use:
Wiring and/or Connector Repair - Brake Transmission Shift Interlock (BTSI)
*This is a unique labor operation for bulletin use only. It will not be published in the Labor Time Guide
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
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i don't find that it has a emergency release some if you turn the key only part way on will release it but if that don work the only thing i see is to remove the lock solenoid if it releases with the key part on you can start in neutral to drive it here is a pic of how the lock is