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SUNROOF DRAIN INSPECTION AND CLEANING Drain Hose Routing A drain trough encircles the sunroof window panel and water is drained off by the drain hoses 1. The front drain hoses are routed down the windshield pillars and out the center of the pillar between the door hinges. The front hoses are installed in a rubber grommet and retained by 2. The rear drain hoses are routed through the rear pillars and out of the rocker panel. In some vehicle the drain hoses are routed out through the metal roof slots and routed to the lower Plugged Drain Hose If a waterleak has occurred check for a plugged drain hose at each corner of drainage system. 1. Open the sunroof window. 2. To test for blockage, pour a small container of water into the module housing drain trough. Check each corner to confirm the drain hose is draining water. 3. Use compressed air, 241 kPa (35 psi) or less to blow out any drain hose that is plugged. 1. Open the sunroof to expose the 2 rivets located on each side. 2. Tape off the under side of the sunroof track when drilling to prevent debris from entering the track. 3. Drill out the rivets. 2 Sunroof Air Deflector IMPORTANT: If the headliner is wet DO NOT remove any interior trim. Do the Plugged Drain Hose test first. CAUTION: Wear safety glasses in order to avoid eye damage.
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Sunroof - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
4. Test the system again. 5. If the hose remains plugged, check to see it is properly routed and does not have a kink. Refer to Sunroof Housing Front Drain Hose Replacement or Sunroof Housing Rear 6. Remove the blockage using the following steps. 1. Push mechanics wire through the hose to remove the obstruction. 2. Use compressed air in order to blow out any remaining material. Disconnected Drain Hose Inspect the drainage system for disconnected drain hoses. Complete the following steps in order 1. Open the sunroof window panel. 2. Lower the headliner as needed. Refer to Headlining Trim Panel Replacement (Regular Cab) or Headlining Trim Panel Replacement (Crew Cab) or Headlining Trim Panel 3. Connect any disconnected hoses. 4. Ensure that the rear drain hoses are properly routed in the metal roof slot and taped in place. SUNROOF WATER GUTTER REPLACEMENT (EXTENDED CAB) Removal Procedure 1. Remove the air deflector. Refer to Sunroof Air Deflector Replacement (Extended Cab) or Sunroof Air Deflector Replacement (Crew Cab). 2. Set the sunroof window to be in the open position of a minimum of 25 mm (1 in). 3. Remove the sunroof module assembly. Refer Sunroof Module Assembly Replacement. IMPORTANT: Tape off the perimeter of the sunroof window opening before removing the sunroof module to prevent scratching. IMPORTANT: It is only necessary to lower the headlinder. Only do those steps in headlinder replacement that will lower the
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Sunroof - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 7: Screws And Water Gutter 4. Remove the screws (1) from the water gutter (2).
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Sunroof - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 8: Water Gutter & Retainers 5. Slide the water gutter rearward to release the retaining tabs (1) from the slots (2) in the track. 6. Remove the water gutter (3) from the track. Installation Procedure
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Sunroof - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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