Lock System Does Not Unlock
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. 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 Steering Wheel and Column - Tilt Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Steering Wheel and Column |
| 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, worn, or damaged key. Is the key incorrect, worn, or damaged? |
Go to Step 7 | Go to Step 4 |
| 4 | Inspect for a faulty lock cylinder. Is the lock cylinder damaged? |
Go to Step 8 | Go to Step 5 |
| 5 | Inspect the lock module assembly for looseness. Is the lock module assembly loose? |
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.
. 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 | Tighten the lock module assembly. Refer to Fastener Tightening Specifications . 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 |