Affected vehicles: 1999-2000 Chevrolet Silverado and 1999-2000 GMC Sierra

Situation: On certain affected vehicles, the galvanized steel tailgate support cables that retain the tailgate in the full open (horizontal) position may corrode, weaken and eventually fracture. If one cable fractures, the remaining cable may retain the tailgate in a horizontal position. However, if the remaining cable is sufficiently weakened by corrosion, it could fracture within moments of the first cable fracturing, especially if there is a load on the tailgate. If both cables fractured, the tailgate would suddenly drop and strike the top surface of the rear bumper. Anyone sitting or standing on the tailgate when both cables fracture could be injured by falling from the tailgate. On vehicles that have had the bumper removed, the cargo may become unstable and fall if the support cable fractures.

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