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    Taking a look at GM's 2015 heavy-duty pickups

    All signs were pointing to the fact that General Motors was going to make a splash at the State Fair of Texas Auto Show, and the manufacturer certainly got things started with a bang. GM used the opening of the fair to debut its new heavy-duty versions of the Chevrolet Silverado and GMC Sierra. 

    GM has a big reveal
    GM used the Auto Show's spotlight to unveil its 2015 heavy-duty pickup trucks, and it certainly succeeded in attracting attention. Fans of the brand are already excited about the possibilities of these new trucks - and that's without knowing a lot of the details. Although these models look similar to the 2015 editions the automaker previously debuted, they are a bit smaller and feature some more rugged elements that make the vehicles primed for heavy-duty work. 

    Heavy-duty trucks account for about 25 percent of GM's pickup sales, and with the most recent round of alterations and upgrades, that number should remain consistent at the very least, The Dallas Morning Star reported. In fact, the latest truck modifications may make Silverado and Sierra two of the most sought-after vehicles on the market. 

    The pickups will be available to the public in the first quarter of 2014. While the manufacturer hasn't released the retail prices, interested drivers can expect to hear more news about the costs and special packages in the near future. 

    Under the hood
    When drivers take a look under the hood of the all-new Silverado or Sierra, they'll see an engine system that is quite similar to existing models. Each of the trucks will feature a standard six-liter V-8 engine with 360 horsepower and 380 foot-pounds of torque. Drivers will also have the option of upgrading to a diesel V-8 engine that is slated to boast 397 horsepower and 765 foot-pounds of torque. 

    "Our engineers felt we had the best engines and transmissions in the segment, so there was no reason to change them," Lloyd Biermann, marketing manager for Chevrolet trucks, told The Dallas Morning News. 

    GM may believe in its engines, but that didn't stop it from making a few alterations to the parts surrounding the motors to enhance efficiency. The air flow has been upgraded to offer consistent performance, and this change should also keep the system cool in even the toughest of conditions. 

    "It is one thing to generate big power numbers in cool weather and another to maintain power and torque when towing up a long grade on a blistering summer day," Jeff Luke, executive chief engineer at Chevrolet, explained to the news source. 

    A look at the interior and exterior
    Much like what's under the hood has remained relatively similar to previous models, the exterior of the GM's trucks is consistent with years past. However, changes have been made to the Chevy suspension found on each vehicle, as well as the boxed frames. A double-cab body increases the amount of room passengers have when driving. 

    "The passion we have for trucks is reflected in every line and powerfully sculpted machines surface of the HD Chevrolet," said Tom Peters, GM's design director, in a statement. "From the dramatic sculpture of the one-piece structural bumper to its muscular hood and side profile, the design reflects a function-driven solution."

    Improvements didn't stop at the exterior, however. Each of the trucks has received new seats and dashboards in addition to 2 more inches of legroom, creating a more comfortable environment for everything from intense work to recreational off-roading. These heavy-duty trucks are poised to leave their mark on the auto industry, especially among people looking for an off-road vehicle that balances power and pizzazz.