The 2006 GMC Sierra 3500 HD Crew Cab SLT 4WD DRW with the 6.6L V8 Duramax Turbo Diesel is a heavy-duty workhorse built for serious towing, hauling, and long-distance comfort. Under the hood, the legendary Duramax diesel engine pairs with the Allison transmission to deliver outstanding torque and towing capability, making it ideal for trailers, equipment, and fifth-wheel setups. The dual rear wheels (DRW) enhance stability under heavy loads, while the 4WD system adds confidence in tough terrain or poor weather. Inside, the SLT trim provides a refined cabin with leather upholstery, dual-zone climate control, power-adjustable heated seats, and woodgrain accents. The Crew Cab design offers spacious seating for five or six, with ample rear legroom and easy access. Outside, its rugged body features bold chrome accents, clearance lights, and a long bed for maximum utility.