Sierra 2500 Denali 2WD V8-6.0L (2011)
17. Disconnect the 2 drive motor connectors from the control wiring harness.
18. Remove the control wiring harness (2) and O-ring seal (1). Discard the O-ring seal.
Installation Procedure
1. Install the control wiring harness (2) and NEW O-ring seal (1).
