Lock System Does Not Unlock

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Yes	No
DEFINITION: The lock system does not allow the key to rotate out of the OFF position.
1	Did you review the Ignition Lock System Description and perform the necessary inspections?	Go to Step 2	Go to Steering Wheel and Column Description and Operation
2	Verify that the lock system does not unlock. Does the lock system operate normally?	System OK	Go to Step 3
3	Inspect for an incorrect, a worn, or a damaged key. Is the key incorrect, worn, or damaged?	Go to Step 8	Go to Step 4
4	Inspect for a faulty lock cylinder. Is the lock cylinder damaged?	Go to Step 9	Go to Step 5
5	Inspect the automatic transmission shift lock control adjustment. Is the automatic transmission shift lock control adjusted incorrectly?	Go to Step 10	Go to Step 6
6	Inspect the lock module assembly for damage. Is the lock module assembly damaged?	Go to Step 11	Go to Step 7
7	Inspect the ignition switch assembly for damage. Is the ignition switch assembly damaged?	Go to Step 12	Go to Step 3
8	Replace the key. Refer to Key and Lock Cylinder Coding in General Information. Did you complete the repair?	Go to Step 13	-
9	Replace the lock cylinder. Refer to Ignition Lock Cylinder Replacement . Did you complete the repair?	Go to Step 13	-
10	Adjust the automatic transmission shift lock control. Did you complete the repair?	Go to Step 13	-
11	Replace the steering column. Refer to Steering Column Replacement . Did you complete the repair?	Go to Step 13	-
12	Replace the ignition switch. Refer to Ignition Switch Replacement . Did you complete the repair?	Go to Step 13	-
13	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 3