Sierra Classic 2500 4WD V8-8.1L (2007)
9. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement.
10. Remove the oil level indicator.
11. Disconnect the oil level sensor electrical connector (4).
12. Remove the engine harness clip from the oil pan.
13. Remove the oil level sensor from the oil pan.
14. Remove the battery cable channel bolt.
15. Remove and reposition the battery cable channel.