: This review has been updated with instrumented test results.Any truck is a big investment, but in the GMC Sierra HD AT4X AEV's case, the investment isn't the only thing that's big. At 8720 pounds, ...

Then Chevrolet trademarked the "ZR2 Bison" name (AEV uses a bison in its logo), which ... with "Chevrolet" written across it. The bumper looks like it could be home to an integrated winch mount ...

AutoGuide reports that GM recently filed a trademark for the name "ZR2 Bison." In fact, we may have already seen a preview of the truck last fall with the Colorado ZR2 AEV concept at SEMA.