Trunk Wiring problems of the 2010 Chevrolet Silverado 1500

On March 30, 2014, I noticed the right front parking light of my 2010 Chevrolet Silverado 1500 was illuminated and all the other lights were off. I tried several different things to get the light to turn off and was unsuccessful, so I disconnected the battery until I could have the issue diagnosed. The mechanic identified the problem as a portion of the terminals in the electrical junction block (fuse/relay panel), located in the engine compartment had significant corrosion which caused a short circuit situation. He also noted that there was no corrosion under the junction block where all the wiring harness plug into. He was perplexed because there was no signs of water or chemical damage to the junction block and also the age of the truck and low mileage. He further stated even with the ignition switch turned off, the panel was very hot due of the electrical resistance caused by the corrosion which caused a situation for a fire. He added that a local Chevrolet dealership had a report of a 2009 Chevrolet Silverado 1500 that had a engine compartment fire due to a faulty electrical junction block. After conducting search of the internet, this seems to be a problem in 2009-2012 Chevrolet silverado's. I am concerned that someone is going to park there truck in there garage and a fire will ensue that will cause injury of death.