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.
Lock System Does Not Lock
2006 Chevrolet Suburban K2500, 6.0 USECTION 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 Steering Wheel and Column Description and Operation? | 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 a faulty lock cylinder or release button. Is the lock cylinder or release button damaged? |
Go to Step 7 | Go to Step 4 |
| 4 | Inspect the shift cable adjustment. Is the shift cable adjusted incorrectly? |
Go to Step 8 | Go to Step 5 |
| 5 | Inspect the ignition switch for damage. Is the ignition switch damaged? |
Go to Step 9 | Go to Step 6 |
| 6 | Inspect the linear shift for damage. Is the linear shift control damaged? |
Go to Step 10 | Go to Step 7 |
| 7 | Replace the lock cylinder. Refer to Ignition Lock Cylinder Replacement . Did you complete the repair? |
Go to Step 11 | - |
| 8 | Adjust the shift cable. Refer to Automatic Transmission Range Selector Cable Adjustment
in Automatic Transmission - 4L60-E/4L65-E or to Automatic Transmission Range Selector Cable Adjustment
in Automatic Transmission - 4L80-E/4L85-E. Did you complete the repair? |
Go to Step 11 | - |
| 9 | Replace the ignition switch. Refer to Ignition Switch Replacement . Did you complete the repair? |
Go to Step 11 | - |
| 10 | Replace the linear shift assembly. Refer to Linear Shift Assembly 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 |
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.