Tail Light Switch Problems of GMC Acadia

The contact owns a 2010 GMC Acadia. The contact stated that the vehicle experienced an electrical failure that affected the tail lights, license plate light, headlights, and power lift gate. The contact took the vehicle to a dealer, but it was not diagnosed. The dealer informed the contact to set up an appointment for diagnostic testing. The manufacturer was not notified of the failure. The failure mileage was approximately 136,000.

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Two separate warranty claims. Dealer did replace all tail light assemblies- once on normal warranty claim, the second incident (lhs only) on customer satisfaction basis. Issue> rear tail light lens clouds up with condensation / water to the point that stop light visibility is affected. Approx 50% of the lens is covered internally with water droplets and condensation potentially violating fmvss safety standard for visibility. Apparently the lamp assembly is not sealed and permits water intrusion. Condensation does not clear up adequately- in my case after 16 miles of driving or leaving the SUV outside overnight. Response from dealer: gm issued a letter stating warranty claims will not be honored for water condensation on tail light lens.

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