The King 2.5-inch rear piggyback reservoir shock with adjuster for 2011 and later Chevrolet Silverado 2500/3500/HD is a rear pair tailored to those heavy-duty trucks. King uses extensive real-world testing to tune damping and ride quality, and the onboard adjuster permits fine-tuning of rear suspension response to better match towing, hauling or changing load conditions.
King Shocks 2011+ Chevrolet Silverado 2500/3500/HD Rear 2.5 Dia Piggyback Res Shock w/Adj (Pair)