Lock System Does Not Unlock
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
Lock System Does Not Unlock
| 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 lock module assembly for damage. Is the lock module assembly damaged? |
Go to Step 9 | Go to Step 6 |
| 6 | Inspect the ignition switch assembly for damage. Is the ignition switch assembly damaged? |
Go to Step 10 | Go to Step 3 |
| 7 | Replace the key. Refer to Key and Lock Cylinder Coding
in General Information. Did you complete the repair? |
Go to Step 11 | - |
| 8 | Replace the lock cylinder. Refer to Ignition Lock Cylinder Replacement . Did you complete the repair? |
Go to Step 11 | - |
| 9 | Replace the steering column. Refer to Steering Column Replacement . Did you complete the repair? |
Go to Step 11 | - |
| 10 | Replace the ignition switch. Refer to Ignition Switch Replacement . Did you complete the repair? |
Go to Step 11 | - |
| 11 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |