These heavy-duty versions are designed for heavy towing and hauling, not ride comfort and handling. The 2500 and 3500 HD models have been freshened for 2011. They are offered in two- and four-wheel drive as well as with the dual rear-wheel setup. Multiple bed sizes are offered. The standard engine is a 6.0-liter V8 with the 397-hp, 6.6-liter turbodiesel optional.
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    GMC Sierra 3500HD Road Test

    These heavy-duty versions are designed for heavy towing and hauling, not ride comfort and handling. The 2500 and 3500 HD models have been freshened for 2011. They are offered in two- and four-wheel drive as well as with the dual rear-wheel setup. Multiple bed sizes are offered. The standard engine is a 6.0-liter V8 with the 397-hp, 6.6-liter turbodiesel optional. A work-oriented interior is offered in addition to more luxurious one that is similar to the one in the GM full-size SUVs.

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