GMC Sierra 3500HD Extended Cab

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Keywords: gmc sierra 3500hd, heavy-duty pickup truck, hauling, towing

Description: This review of the GMC Sierra 3500HD Heavy-Duty Pickup Truck includes model information, specs and buying advice.

But just how heavy duty it is has continued to improve over the years. Although today's Sierra looks pretty similar inside and out to the truck that debuted back in 2007, the frame, suspension components and engines were overhauled in 2011. As such, the Sierra 3500HD is getting a little long in the tooth in terms of design and interior creature comforts, but is the leader in the areas that really matter in this class.

The GMC Sierra 3500HD is available in regular, extended or crew cab designs. Rear-wheel or four-wheel drive is offered, as is a dual-rear-wheel axle. The extended cab and crew cab body styles are offered in four trim levels: Work Truck, SLE, SLT and top-of-the-line Denali. The regular cabin can only be had in Work Truck and SLE trims. Moving up through the ranks obviously adds more style and features, culminating in the Denali.

Standard on all Sierra 3500HD pickups is a 6.0-liter V8 that makes 360 horsepower and 380 pound-feet of torque, paired to a six-speed automatic transmission. The burly Duramax 6.6-liter turbodiesel V8 that puts out 397 hp and 765 lb-ft of torque is optional. Its standard Allison six-speed automatic is well-suited to towing and hauling large loads.

The Sierra 3500HD is arguably the most competent, refined and easy-to-drive heavy-duty pickup on the road. Although multigenerational brand loyalty may dictate which heavy-duty pickup you take home, sticking with (or switching to) the Sierra 3500HD would no doubt be a solid decision if you want a full-size heavy-duty truck.

The present-generation GMC Sierra 3500HD debuted for the 2007 model year. Originally, the 6.0-liter gasoline V8 produced 353 hp and 373 lb-ft of torque, while the 6.6-liter diesel V8 was good for 365 hp and 660 lb-ft. The gasoline engine's current output arrived for 2010.

It's also important to note that for 2011 the Sierra received an all-new frame along with new suspension components (for greater towing capacity and a smoother ride), a more potent turbodiesel engine cranking out 397 hp and 765 lb-ft (previously 365 hp and 660 lb-ft) and the debut of the ultra-plush Denali trim level.

Previous to the current truck, there were two past generations of the Sierra 3500. They were still known as the 3500 but lacked the "HD" moniker.

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