Suspension Noise problems of the 2016 Chevrolet Silverado 1500

Rear leaf spring assembly, leaf spring bushings and hardware premature failure. Possible leaf spring and or frame mount inadequately designed. Rear leaf spring assembly, specifically the bushings and mounting hardware failed on one set of leaf springs, and is in the process of failing on a second replacement set, resulting in undesirable bind/wobble sounds and hollow thump noise felt inside the cabin (noise similar to a loose spare tire wobbling and striking the underside of the truck bed). The problem is most noticeable at low speeds both in reverse and forward. The more miles on the vehicle, the louder and more frequent the issue becomes. The concern is of premature part failure or breakage resulting in injury. The original set of gm leaf springs that were installed at the gm factory were manufactured in canada and failed around 15,000 miles. Gm replacement leaf springs installed were made in mexico and are failing at about 15,000 miles. The total mileage on the vehicle as of 5/30/2017 is about 30,000 miles. The vehicle is well cared for and is always serviced at the gm dealership at manufacturer's recommended intervals. Mostly highway miles. Primarily daily commuter vehicle to and from a desk job. No hauling or loads in the bed of the truck. The manufacturer/dealers issued TSB's recommending to pressure wash the leaf spring assembly, check suspension hardware torque specs, and disassemble, lube and re-assemble the leaf spring pack. These have been performed by a gm dealer and did not resolve the problem. Replacing the springs has not permanently resolved the issue. Gm truck forums indicate other owners of this model and year+/- report the similar experiences in the Chevrolet Silverado 1500 and sierra model gm pickups. Some owners have replaced factory parts with aftermarket leaf springs with success in permanantly resolving the issue and concern.