Manufacturer communication — 2006 GMC YUKON DENALI XL

• Applies to 2015 and earlier GM passenger cars and trucks.

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  Models: 2015 and Prior GM Passenger Cars and Trucks

• Impact damage most often shows up as a lamp assembly that holds moisture, is inoperative, or is blemished.

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  Impact Damage is most often presented as the assembly is holding moisture, is inoperative, or blemished.

Possible causes

• A variety of chemicals can cause crazing or cracking of the polycarbonate lens.

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  A variety of chemicals can cause crazing or cracking of the polycarbonate lens.

Steps to confirm (in the document’s order)

1. Broken mounting tabs, rear housing fractures and loose components inside the lamp assembly are evidence of impact damage.

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   Broken mounting tabs, rear housing fractures, and loose components inside the lamp assembly are evidence if impact damage.

2. The most reliable way to identify a non original-equipment lamp is to compare it with the replacement service part or a like vehicle.

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   The most reliable way to identify a non OE part is to compare it to the replacement service part or a like vehicle.

Repair

• Clean exterior lamps and lenses only with lukewarm or cold water, a soft cloth and a car washing soap.

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  Warning: Use only lukewarm or cold water, a soft cloth and a car washing soap to clean exterior lamps and lenses.

Caution

• Rubbing compound, grease/tar/oil removers, tire cleaners, prep solvents for pin striping, cleaner/waxes, undiluted washer solvent, alcohol and car wash soaps in too high a concentration may also damage the lens.

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  Also rubbing compound, grease/tar/oil removers, tire cleaners, prep solvents for pin stripping, cleaner/waxes, undiluted washer solvent, alcohol and even car wash soaps in too high a concentration may also damage the lens.

• Crazing or deformation of the lens may occur if a shop mat or fender cover covers part or all of the headlamp assembly while the DRL or headlamps are on.

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  Crazing or deformations of the lens may occur if a shop mat or fender cover is draped over the fender and covers a portion or all of the headlamp assembly while the DRL or headlamps are on.