Sierra 3500 Denali 2WD V8-6.0L (2011)
5. Remove the dress cover by using a flat bladed tool to release the dress cover locking tabs and lift up on the dress cover.
6. Cut the tie wrap that holds the wires to the connector body.
7. Use a small flat-blade tool to pry one side of the nose piece up to the pre-stage position. When the nose piece is in the pre-staged position, the nose
piece will be raised above the connector body the length of the step in the nose piece.