The ZR2 package provides a wider stance, special chassis, four-inch wider tread, underbody skid plates, Bilstein heavy duty shock absorbers, large wheels and axle bearings, rear axle track bar, 3.73 rear axle with 8.5-inch ring gear, and oversize 31x10.5 R15 Light Truck tires. This brute is eager to crawl over logs, rocks through mud and any other obstacle that may get it its way. Ground clearance is a generous 8.6 inches, which combined with the large tires gives a 23-inch step-up height into the cab. Aside from skirting obstacles, this heightened chassis can nicely navigate deep roadway water resulting from heavy rain deluges.
Powered by Chevy's proven and exemplary 4.3-liter 190-hp V-6 engine, the Blazer LS ZR2 test vehicle had more than enough grunt to climb some steep, rock infested Pocono Mountain area off-road trails. In fact the ZR2 rides better off-road than it does on-road but then it was designed that way.
The four-wheel drive transaxle in the test truck was the optional electronic shifting transfer case which allows four-wheel high or low range at the touch of a dash-mounted button.