Installation Procedure

Connect the rear drain hose from the drain exit located at the rear of the sunroof on either side.

Fig 1: Connecting Rear Drain Hose From Drain Exit Located At Rear Of Sunroof On Either Side - Rear
Courtesy of GENERAL MOTORS CORP.
Install the rosebud clips securing the drain hose to the vehicle.
Install the end of the drain hose into the sill opening.
Install the headliner. Refer to HEADLINER REPLACEMENT (PICKUP) or HEADLINER REPLACEMENT (UTILITY) or HEADLINER REPLACEMENT (EXTENDED CAB PICKUP) .

Fig 2: Installing Rosebud Clips Securing Drain Hose To Vehicle - Rear
Courtesy of GENERAL MOTORS CORP.