Sierra 3500 Denali 4WD V8-6.0L (2011)
Oil Level Sensor: Service and Repair
Engine Oil Level Sensor and/or Switch Replacement (6.2L and 7.0L)
Removal Procedure
1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (See: Maintenance/Vehicle Lifting/Service and Repair).
2. Place a suitable drain pan under the oil pan drain plug.
3. Remove the oil pan drain plug (430).
4. Allow the oil pan to drain completely.
5. Re-install the oil pan drain plug until snug.
6. Remove the drain pan from under the vehicle.
7. Disconnect the engine harness electrical connector (4) from the oil level sensor.