Manufacturer communication — 2006 GMC YUKON DENALI XL

• All models, model years 2005 - 2021.

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  All All 2005 - 2021 All All All All

• Intermittent sunroof operation, bind, noise, auto-reverse and/or water leaks.

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  Some customers may comment on intermittent sunroof operation, bind, noise, auto-reverse, and/or water leaks.

Possible causes

• Dirt and debris collect on the sunroof seal or in the tracks, affecting operation, causing noise or plugging the water drainage system.

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  Dirt and debris may collect on the sunroof seal or in the tracks that could cause an issue with sunroof operation, noise or plug the water drainage system.

Steps to confirm (in the document’s order)

• Verify that the module drain holes are not plugged.

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  Verify that the module drain holes are not plugged.

Repair

1. Open the sunroof and remove any obstacles or loose debris.

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   Open the sunroof and remove any obstacles or loose debris.

2. Wipe the sunroof seal and the roof sealing area with a clean cloth, mild soap and water.

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   Wipe the sunroof seal and roof sealing area using a clean cloth, mild soap, and water.

Caution

• Do not remove grease from the sunroof.

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  Please do not remove grease from sunroof.

• Some replaced sunroof module assemblies returned to the warranty parts center were found to need only cleaning of these areas.

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  Some sunroof module assemblies that have been replaced, and sent back to the warranty parts center, have been tested and found that simple cleaning of these areas would have repaired the condition and prevented the replacement of the sunroof module assembly.