I did a search about the headlights cracking, as mine have , and came across a TSB: " 02-08-42-001B 10/08/2004 Lighting - Damage To Polycarbonate Headlamp Lenses "

I was just wondering if someone could look up and post the full TSB for it. THANKS!!

 

 

Subject: Info - Chemical Damage to Exterior Polycarbonate Headlamp Lenses #02-08-42-001B - (10/08/2004)



Models: 2005 and Prior Passenger Cars and Trucks

2003-2005 HUMMER H2




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This bulletin is being revised to add the 2004 and 2005 model years. Please discard Corporate Bulletin Number 02-08-42-001A (Section 08 - Body and Accessories).


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The bulletin is being issued to make dealers and customers aware of chemical damage that may be caused to exterior polycarbonate headlamp lenses. Most late model vehicles have these types of headlamp lenses. This material is used because of its temperature and high impact resistance.

A variety of chemicals can cause crazing or cracking of the headlamp lens. Headlamp lenses are very sensitive. Care should be exercised to avoid contact with all exterior headlamp lenses when treating a vehicle with any type of chemical, such as those recommended for rail dust removal. Rubbing compound, grease tar and oil removers, tire cleaners, cleaner waxes and even car wash soaps in too high a concentration may also attribute to this condition. This could result in the need to replace the entire headlamp housing.

Also, 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. This action restricts the amount of heat dissipated by the headlamps.

Once a heat buildup is generated by the headlamp, a degradation of the headlamp lens begins. This degradation of the lens can be unnoticeable at first and eventually manifest as spider cracks. In more extreme cases, it will begin to melt the lens of the headlamp.

 

Here is another bulletin I found....


Subject: Fine Cracks or Crazing on Head Lamp Lens - keywords appearance cover crack crazing fade head headlamp lamp lens light #PIC4624 - (09/26/2007)



Models: 2005-2008 Chevrolet Corvette




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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
Some customers may comment of fine cracks or crazing noticed on the headlamp lens. This may occur if the customer or dealer installs covers over the headlamp assemblies. These covers may not allow the headlamps to maintain proper temperature and will distort the OEM headlamp lens assembly.

Recommendation/Instructions:
General Motors DOES NOT recommend the use of aftermarket headlamp lens covers. If a customer chooses to install these covers, any distortion caused by the covers will be the responsibility of the customer and will not be covered under warranty.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

 

GEE, GLAD GM MADE THEM TO HOLD UP