A grommet is inserted into a notch in a channel and partially supports a seal strip attached to the channel. The grommet includes a main segment and first and second end segments. The main segment extends from a first end to a second end along a longitudinal axis and has a first side surface and a second side surface. The first end segment is attached to the main segment adjacent to the first end of the main segment. The second end segment is attached to the main segment adjacent to the second end of the main segment. The main segment, the first end segment, and the second end segment together define a passageway extending through the grommet parallel to the longitudinal axis. A cable harness including a grommet and a vehicle including a grommet are also provided.