Installation Procedure

Install the sunroof drain hose to the spigot at the front corner of the sunroof.

Fig 1: Installing Sunroof Drain Hose To Spigot At Front Corner Of Sunroof - Front
Courtesy of GENERAL MOTORS CORP.
Wrap the left drain hose to the dome lamp wiring harness using electrical tape.
Install 4 rosebud clips on the harness assembly into the left front side door opening frame.

Fig 2: Wrapping Left Drain Hose To Dome Lamp Wiring Harness Using Electrical Tape - Front
Courtesy of GENERAL MOTORS CORP.
Install the 3 rosebud clips on the right drain hose into the right front side door opening frame.

Fig 3: Installing 3 Rosebud Clips On Right Drain Hose Into Right Front Side Door Opening Frame - Front
Courtesy of GENERAL MOTORS CORP.
Insert the hose through the hole in the outer sheet metal until the paint mark on the hose is visible.
The hole is located above the front door top hinge.
Install the headliner. Refer to HEADLINER REPLACEMENT (PICKUP) or HEADLINER REPLACEMENT (UTILITY) or HEADLINER REPLACEMENT (EXTENDED CAB PICKUP) in Interior Trim.

Fig 4: Inserting Hose Through Hole In Outer Sheet Metal Until Paint Mark On Hose Is Visible - Front
Courtesy of GENERAL MOTORS CORP.