The way things used to work was that an off-road enthusiast would buy a stock 4x4 truck and then modify it with a suspension lift ... a 2500 or 3500, it only makes sense to upgrade to the ZR2 ...

Ground clearance and rough terrain are handled with a two-inch lift and integral skid plates, while the wider track helps enhance stability in potentially unstable situations. The Colorado ZR2's ...

But that’s just a good ol’ case of perspective rot, which set in sometime around the appearance of Chevy’s now-legendary ZR2 badge on its 1500 and 2500 trucks. A Z71? When the ZR2 exists?