A used 2013 Chevrolet Silverado 1500 4x4 crew cab with the LTZ package in very good condition has a Kelley Blue Book value of $30,812 if purchased from a private party as of October 2015. The same vehicle has a NADA clean retail value of $35,025.
The Kelley Blue Book valuation for a used 2013 Chevrolet Silverado 1500 crew cab with the LTZ package in fair condition is $28,007, and in excellent condition, it's $31,788. The NADA trade-in value for the same vehicle is $28,500 in rough condition and $31,775 for a clean vehicle. Available options that increase the price include a power sun roof, fixed running boards, a bedliner, the Z71 off road package and the 6.2 liter V8 engine.