The 2027 GMC Sierra 1500 AT4X was spied testing alongside the Chevy Silverado ZR2 in Michigan. You can expect big changes for each of these trucks. First Look: Sierra AT4X and Silverado ZR2 Caught on Camera The next-generation 2027 GMC Sierra AT4X has been spotted testing around GM’s facilities in Michigan, offering the first real-world look at GM’s upcoming off-road upgrades. Spy photographers also captured the truck’s Chevrolet twin — the 2027 Chevrolet Silverado ZR2 — running on the same evaluation loop. Both prototypes wore heavy camouflage, but enough was visible to confirm that GM is working on major mechanical, […] (read full article...)