2009 convertible top won't open fully, but will re-secure from "down" button. GMC dealer computer says error code #B366A 59, Left Front RCL Latch Switch. Apparently, it is a latch switch for the opening of the leading edge of the trunk lid. Dealer says original GM part "out of stock." Does anyone know exactly what this switch looks like, where it is located in the car, where I can get a new one for the dealer besides a wrecking yard, or whether it is rebuildable or not?