The 2005 GMC Sierra 3500 is a part of the beloved truck's first generation. It comes in three trims: Work Truck, SLE and SLT. This powerful heavy-duty truck is available in a single rear-wheel (SRW) or dual rear-wheel (DRW) configuration, equipped with either a 300-hp V8 gas or a 310-hp diesel V8 engine, both paired with an automatic transmission. As for the drivetrain, the Sierra 3500 offers both RWD and optional 4WD. Inside, the Sierra 3500 offers a hard-working yet comfortable interior. While there's no modern infotainment system, it does have available features for its time like an in-dash 6-disc CD changer. All in all, this durable workhorse is designed for hefty towing, robust performances and dominating the roughest terrains.