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2018 GMC Sierra 1500 Buying Guide | What you need to know about this pickup truck

The GMC Sierra is a work-capable truck that can be optioned like a luxury car. Variety and choice are the keywords for the Sierra, not to mention close rivals like the Ford F-150, Ram 1500, and Chevrolet's own Silverado 1500. A Sierra buyer has a seemingly infinite list of choices when it comes to specifying exactly what they need in their pickup. In terms of cab length alone, there are three choices – Regular, Double, and Crew – to go along with your pick of Short, Standard, or Long cargo bed. Engines range from a 4.3-liter V6, upward to a range-topping 6.2-liter V8 available in top trim levels like the SLT and Denali. The Sierra can be ordered with a choice of two- or four-wheel drive, and transmissions include both a 6- and 8-speed automatic, depending on your choice of powertrain and trim. Changes for the 2018 model year include the standard fitment of a rearview camera, along with a Tire Fill Alert system that lets the driver know when the correct pressure has been reached. A 7.0-inch touch-screen stereo system is also now standard equipment on base Sierras. Is the 2018 GMC Sierra Safe? The National Highway Traffic Safety Administration gives the 2018 GMC Sierra 1500 an overall crash-test rating of five stars. In front and side impact tests, the latest Sierra 1500 scored a five-star safety rating. A four-star rating was recorded in the Rollover resistance test – this rating applies to Sierra trucks fitted with either rear- or all-wheel drive. Because the Sierra is such a popular vehicle, it's worth noting that the NHTSA conducted crash tests on models fitted with both these drivetrains, and in two cab lengths. The Insurance Institute for Highway Safety, which provides ratings for new vehicles based on its own comprehensive crash tests, also tested two versions of the Sierra 1500. The extended cab model registered "good" ratings in all but one of the IIHS' crash tests. Driver side protection in the small overlap test was deemed "acceptable" – front passenger-side results were not rated. Headlight effectiveness was given an "acceptable" rating, dependent on trim level selected. Meanwhile, the ease of use of the Child Seat Anchors (LATCH) was deemed "acceptable" in the extended cab Sierra. Ratings dip slightly for the Sierra 1500 in standard cab format. Driver-side protection in the front small overlap test drops to "marginal," while the available LATCH system scored a "poor" for its ease of use.

GM diesel pickups first to undergo extra EPA, CARB testing

The effects of Volkswagen's long-running diesel emissions evasion are starting to spill over to other automakers, but General Motors is taking things in stride. The 2.8-liter, four-cylinder Duramax in the 2016 Chevrolet Colorado and GMC Canyon is the first engine to get extra scrutiny by the Environmental Protection Agency and the California Air Resources Board, Automotive News reports. Rather than just the usual in-lab test, it's also being checked on the road. However, the extra evaluation shouldn't have any impact on when the trucks with his mill hit dealers later this fall. "We're in our final stages of the EPA certification, and our launch is on track," Chevy spokesperson Otie McKinley tells Autoblog. The four-cylinder diesel in the trucks makes 181 horsepower and 369 pound-feet of torque, and the automaker is touting low NOx production. In the announcement for the Colorado's specs, the company calls it "the cleanest diesel truck engine ever produced by General Motors." The tech includes exhaust gas recirculation to lower combustion temperatures and improve emissions. There's also a urea tank like on the bigger diesels for full-size trucks, and it gets refilled in time with oil changes. An indication on the instrument panel lets drivers know when that's needed, too. Even with the more demanding testing, the company doesn't seem too worried about the four-cylinder passing. "Part of our development process is on-road and off-road [laboratory] testing," Scott Yackley, Chevy Trucks assistant chief engineer, said to Automotive News. In the wake of the VW scandal, the EPA has pledged more rigorous testing. Before, on-road emissions evaluations were largely limited to heavy-duty vehicles, but the agency has decided to apply the checks more often to other models. There's also now greater cooperation with Canadian authorities.

General Motors designers sketch the GMC pickups of the future

It's been a busy few years for GMC's team of stylists. They penned a new look for the Yukon and the Yukon XL, and they gave the Sierra 1500 a nip-and-tuck that we'll discover in the coming months. Overhauling these hugely significant models hasn't stopped them from exploring how the firm's design language can evolve. General Motors Design posted two forward-thinking renderings on its official Instagram account that illustrate two ways to move GMC's design identity forward. Karan Moorjani, who works as an exterior designer for the company's autonomous and electric vehicle division, created a truck that breaks all ties with the Sierra. It's characterized by a tall front end with a wide grille and thin LED headlights, sculpted sides, and an unusually low cab. Generously-sized fender flares and tires suggest Moorjani envisioned it as a serious off-roader. Joe Boniface, a member of GMC's Strategic Advanced Design team, took a more realistic approach to moving the design language forward and away from sister company Chevrolet's. His rendering shows a Heavy Duty model with a Denali-branded grille that takes up most of the real estate on the front end and encompasses horizontal rows of LED daytime running lights. It wears less chrome than the current-generation Sierra HD. Nothing suggests either truck is currently on its way to production; General Motors Design regularly publishes sketches from the brand's stylists. Its fascinating Instagram account also shows a Cadillac off-roader, a battle-ready Chevrolet pickup, and a high-riding, open-top two-seater with General Motors emblems that looks like a race car for the Moon.  "Often, these works are not intended for production," a GM spokesperson told Autoblog. "Instead, designers create them to hone their creative skills, to try new shapes or themes, and sometimes simply for the fun of sketching something badass. The GM Design Instagram account was launched to share some of the most compelling, most badass works GM Designers produce." They're sketches created for the sake of sketching, but they give us a peek at the ideas floating around the minds of the men and women who will draw the next generation of General Motors products. Related Video: