Removal Procedure

Remove the headliner. Refer to HEADLINER REPLACEMENT (PICKUP) or HEADLINER REPLACEMENT (UTILITY) or HEADLINER REPLACEMENT (EXTENDED CAB PICKUP)

Fig 1: Disconnecting Rear Drain Hose From Drain Exit Located At Rear Of Sunroof On Either Side - Rear
Courtesy of GENERAL MOTORS CORP.
Disconnect the rear drain hose from the drain exit located at the rear of the sunroof on either side.
Remove the rosebud clips securing the drain hose to the vehicle.
Remove the drain hose.

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