Discover 100's of Accessories for your 2006 GMC Sierra 1500 Truck. We feature A Huge Selection of of accessories for your 2006 GMC Sierra 1500. Dive Into performance, interior and exterior accessories from all the top brands. Accessorize your GMC Sierra 1500 Pickup and get Free Shipping a Low Price. Plus, if you need help finding the best accessory for your GMC, our product specialists are available to help you 7-days a week.