With a built-in RES™ rail expansion system, UltraGroove™  makes it easy to attach nearly any Thule® or Yakima® rack for bikes, kayaks, cargo baskets and more. With or without racks, it's incredibly easy to use and it's covered with a weather-resistant, padded ArmorTek deck laminated to rigid aluminum panels. It opens quickly with just a turn of the lock knob and closes just as easily with a pull on the built-in strap.

This Part Fits:

Year	Make	Model	Submodel
2016	Chevrolet	Silverado 1500	Custom
2014-2018	Chevrolet	Silverado 1500	High Country
2009-2013	Chevrolet	Silverado 1500	Hybrid
2004-2006,2008-2013,2015-2018	Chevrolet	Silverado 1500	LS
2004-2018	Chevrolet	Silverado 1500	LT
2007-2018	Chevrolet	Silverado 1500	LTZ
2015-2018	Chevrolet	Silverado 1500	SSV
2007-2018	Chevrolet	Silverado 1500	WT
2010-2013	Chevrolet	Silverado 1500	XFE
2004	Chevrolet	Silverado 1500	Z71
2015-2017	GMC	Sierra 1500	Base
2015-2017	GMC	Sierra 1500	Denali
2015-2017	GMC	Sierra 1500	SLE
2015-2017	GMC	Sierra 1500	SLT