HAVIS's PKG-PSM-3003 2021 Chevrolet Tahoe, 2019-2021 Silverado & GMC Sierra 1500 Premium Passenger Side Mount Package. Premium passenger side mount package for Chevrolet 2021 Tahoe, 2019-2021 Sierra 1500 and Silverado 1500 (4th generation), and 2020-2021 Sierra 2500HD, 3500HD, and Silverado 2500HD, 3500HD Premium PKG-PSM package includes a Heavy-duty vehicle specific base plate, Heavy-duty pole with height adjust handle, swing arm motion device with tilt-swivel and stability support arm. By bundling all of the necessary parts in one sku we have simplified the ordering process. The Heavy-duty vehicle specific mounting base mounts to existing OEM seat bolts for easy installation (C-HDM-1003). Heavy-duty height adjustable poles bolt to the vehicle specific base. precision machined parts eliminate metal-to-metal contact and allow for smooth movement during height adjustment. (C-HDM-202). Swing arms with motion adapters are ideal for computer usage from both the driver and front passenger seats. (C-MD-112). Side support arms add upper pole support for premium top level stability. (C-HDM-401). Packages are complete and must be ordered as-is