The ZR2 package for Silverado and Colorado ... lift, heavy-duty shocks, and big all-terrain tires. While this was great for after-market companies, it was pricey for the consumer. Chevy recognized ...

Chevy uses the ZR2 designation for the more capable off-road versions of the internal-combustion Silverado and Colorado pickups ... Boss will have a factory lift kit, 35-inch all-terrain tires ...