If you think you need, or want, a pickup truck for do-it-yourself weekend projects, the 2007 Chevrolet Avalanche is what you want to buy thanks to its ingenious “midgate” which allows the cargo bed to expand into the interior for carrying longer loads. The Avalanche shares its unibody structure with the redesigned 2007 Suburban, which means towing is restricted to a maximum of 8,000 pounds. In contrast, the new Silverado is a traditional body-on-frame pickup with a separate cargo box designed for hauling and towing heavier loads. It is possible that light-duty versions of the new Silverado will share the Avalanche’s front styling.