For our first full-size project vehicle, we selected a halfton GMC with their AT4 (all-terrain 4WD) package. The base Sierra is known for its quality of assembly, overall driver comfort, and 60,000-mile, bumper-to-bumper warranty. In recent years, GM has been taking overlanding by storm, releasing model after model well-suited to this form of travel. It started with the ZR2 Bison and now includes multiple AT4 models, the new AT4x Sierra and Canyon, and the much-anticipated AEV variants.
Ideally, we wanted an extended-cab, standard-bed Sierra, but it was not available in the AT4, so we chose the crew-cab, standard-bed option, which gives a 6.5-foot bed length and a 157-inch wheelbase. It’s a big truck with an overall length of just over 20 feet, so the extra clearance of the AT4 lift…
