GMC Sierra Grande Concept Reminds Us Single Cabs Are The Gnarliest Trucks Of All GMC is doing the single cab pickup justice at SEMA this year with a concept that dials up the off-road capability and finally scales back the number of doors. GMC partnered with AEV to develop the GMC Sierra Grande Concept, built off of a GMC Sierra 2500 HD in a single cab, long bed configuration. The finished… Read more…