I have a 06 Silvarado that I purchased from dealer in 07 and purchased extended warranty. In 2010, I noticed door molding discoloration. I brought truck to dealer and was told it was not covered. Truck has low mileage. Anyone experience the same issue?

 

What did you use to clean it? Sounds to me like you might use lemon pledge or maybe got a little oil or something else on the rubber. I worked on cars for years and never saw anything like your talking about unless some one caused it. Maybe your mechanic got some grease on it or something.