2017 GMC Sierra 1500, SLT, 4x4 SLT four door Double Cab 6.5 feet. SB, For a top driving experience, check out this 2017 GMC Sierra 1500 SLT with a remote starter, backup camera, Bluetooth, braking assist, dual climate control, hill start assist, stability control, traction control, upgraded music system, and a MP3 player. It comes with a 5.3 liter 8 Cyl engine. We've got it for $50,271. Other dealers are asking for at least $52,850. This double cab 4x4 is 1 of the safest you could buy. It earned a crash test rating of five out of five stars. For a great looking vehicle from the inside out, this car features a sharp black exterior along with a jet black interior. Want to learn more? Contact for details for more details. Marty's Buick GMC, five Kingston Collection Way, Kingston MA. Contact details: Marty's Buick GMC, five Kingston Collection Way, Kingston, MA, 02364, Phone: (781) 585-XXXX, E-mail: XXXX@martysgmc.com.