The magnificent Duramax is available in pickup trucks and now in the company's vans, but for whatever reason not even the 3/4-ton Suburban and Yukon XL get any compression-ignition love.

General Motors released a slew of new images yesterday that show us what the Z71 off-road package looks like on two of the three GMT900 model SUVs. The Avalanche, Tahoe and Suburban are available ...