Installation Procedure

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Slide the drain channel into the guide tab (2).
Push on the drain channel (1) until it locks into place by the retainer (3). Do the same for the other side.

Fig 1: View Of Sunroof Drain Channel, Tab & Guide

Courtesy of GENERAL MOTORS CORP.

Ensure both sides are properly seated in the guide.
Install the sunroof glass panel. Refer to Sunroof Window Replacement .