GENERAL MOTORS recall on AVALANCHEESCALADE EXT,SIERRA and 1 more model

On certain vehicles, the galvanized-braided-steel tailgate support cables used to support the tailgate in the full open (horizontal) position can corrode over time and fracture when loads are applied to them. Tailgate support cable corrosion may not be visible because of the plastic sheathing covering the cable. If one cable fractured, the remaining cable may retain the tailgate in a horizontal position. If the remaining cable was weakened by corrosion, it could fracture within moments of the first cable fracture. If both cables fractured, the tailgate would suddenly drop approximately 10 degrees and strike the top surface of the rear bumper. If anyone is sitting or standing on the horizontal surface of the tailgate when both cables fracture, they could fall and be injured. On vehicles without a rear bumper, the tailgate may drop to a lower position. Correction: Dealers will replace the existing galvanized support cables with stainless steel support cables.