Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK2006TERRAZA CXL, 3.5 L, AWDREPAIR AND DIAGNOSISSTEERINGSTEERING WHEEL & STEERING COLUMNDIAGNOSTIC INFORMATION AND PROCEDURESLOCK SYSTEM DOES NOT LOCK
2006 Buick Terraza CXL, 3.5 L, AWD
Lock System Does Not Lock
2006 Buick Terraza CXL, 3.5 L, AWDSECTION Lock System Does Not Lock
Lock System Does Not Lock
| Step | Action | Yes | No |
|---|---|---|---|
| DEFINITION: The lock system will not allow the key to be turned to the OFF lock 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 lock. 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 9 | Go to Step 4 |
| 4 | Inspect for a faulty lock cylinder. Is the lock cylinder or release button damaged? |
Go to Step 10 | Go to Step 5 |
| 5 | Inspect the shift linkage adjustment. Is the shift linkage adjusted incorrectly? |
Go to Step 11 | Go to Step 6 |
| 6 | Inspect the automatic transmission shift lock control for damage. Is the automatic shift lock control damaged? |
Go to Step 12 | Go to Step 7 |
| 7 | Inspect the ignition switch for damage. Is the ignition switch damaged? |
Go to Step 12 | Go to Step 8 |
| 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 shift linkage. Did you complete the repair? |
Go to Step 13 | - |
| 11 | Replace the automatic transmission shift lock control. Refer to Automatic Transmission Shift Lock Actuator Replacement
in Shift Lock Control. 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 |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.