Manufacturer communication — 2006 GMC YUKON DENALI XL

• The model table lists all brands and models, model years 2005 - 2018.

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  Model Years: VIN: Engine: Transmissions: from to All All 2005 - 2018 All All All All

• Customers may comment on 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 may collect on the sunroof seal or in the tracks, causing an operation issue or 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.

Repair

1. Open the sunroof and remove any obstacles or loose debris, and verify that the module drain holes are not plugged.

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   Open the sunroof and remove any obstacles or loose debris. Verify that the module drain holes are not plugged.

2. Wipe the sunroof seal and the roof sealing area with a clean cloth, mild soap and water; do not remove the grease from the sunroof.

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   Wipe the sunroof seal and roof sealing area using a clean cloth, mild soap, and water. Please do not remove grease from sunroof.

Caution

• Some replaced sunroof module assemblies returned to the warranty parts center were tested and found that simple cleaning of these areas would have repaired the condition.

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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.