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Next-gen Chevy Silverado and GMC Sierra may use carbon fiber

It's been generally accepted that the next generation of full-size GM trucks will use some sort of strong, lightweight material for the beds while retaining steel for the cab. While aluminum seems like the most obvious choice, according to Automotive News, the Chevy Silverado and GMC Sierra will incorporate both aluminum and carbon fiber in their beds. The publication cites sources from within GM, though it seems the introduction of this comparatively exotic material mix is still a few years off. While carbon fiber is both stronger and lighter than steel and aluminum, it takes significantly more time and money to produce, essentially relegating the material to small-volume cars. The main benefit for trucks is the resulting reduction in weight to improve fuel economy without sacrificing the tough, rugged capabilities truck buyers expect. The Ford F-150 made the switch to aluminum for the 2015 model year and it's proved highly successful. It seemed like it was only a matter of time before the competition followed suit. Automotive News says that the next-gen trucks will launch with aluminum beds and that it will take a couple of years before we'll see any carbon fiber incorporated into the design. Even then, only look for the composite material on higher-trim models, with a trickle down to lower-spec trucks possible further in the future. In 2011, GM announced it was working with Japan-based Teijin Limited on a carbon fiber reinforced thermoplastic. There's a good chance that material's introduction will be on trucks. Related Video: News Source: Automotive News Plants/Manufacturing Rumormill Chevrolet GM GMC Truck

Two More Recalls Push GM Total To 4.8 Million In A Month

General Motors announced two more recalls late Friday, bringing to 4.8 million the number of cars, trucks and SUVs the automaker has called back for repairs in the past month. The string of recalls, topped by an ignition switch problem in compact cars now linked to 13 crash deaths, has embarrassed the company and sidetracked its new CEO, who started work just over two months ago. GM has admitted knowing about the switch problem a decade ago, yet it didn't recall any cars until February. The recall delay has brought two congressional investigations and probes by the Justice Department and the National Highway Traffic Safety Administration. Late Friday night, GM announced it would recall 490,000 late-model pickup trucks and SUVs because transmission oil cooling lines weren't secured properly in their fittings. Transmission oil can leak from a fitting and hit hot surfaces, causing fires, the company said in a statement. GM said it knows of three fires and no injuries. The recall affects Chevrolet Silverado and GMC Sierra 1500 pickup trucks from the 2014 model year, as well as 2015 Chevrolet Suburban and Tahoe SUVs and the GMC Yukon and Yukon XL SUVs. All have six-speed automatic transmissions. The Silverado is GM's top-selling vehicle and an important profit center for the company. The GMC Sierra also is among GM's top sellers. Dealers will inspect the transmission oil cooling line fittings and make sure they're securely seated, at no cost to owners. Also Friday night, GM announced the recall of 172,000 Chevrolet Cruze compact cars because the right front axle shaft can fracture and separate while being driven. The recall affects cars from the 2013 and 2014 model years equipped with 1.4-liter turbocharged four-cylinder gasoline engines. If a shaft fractures, the wheels would lose power without warning and the cars would coast to a stop. GM says it has warranty reports of several dozen shaft fractures. It is not aware of any crashes or injuries. Dealers will replace the shafts free of charge. The recall allows dealers to resume selling affected Cruzes. GM issued a stop sale order on the cars Thursday night. The recall also covers about 2,500 replacement shafts used to fix manual transmission Cruzes that were recalled last September. In all, GM has recalled 4.8 million vehicles since last month, two million more than the company sold last year in the U.S.

2017 GMC Acadia First Drive

We're in the midst of the Second Great CUV War, and the crossovers are winning by a lot. Compact sedans are being hauled around the side of idled factories and unceremoniously shot. FCA, whose be-sweatered CEO is either omnipotent or a troll of the highest order, is organizing a last stand around profit-dense SUVs and trucks on the off chance that gas prices don't rise ever again. It's the tall wagon's finest hour, and GMC is hoping the new Acadia will capture a share of the glory. The old Lambda-platform Acadia was introduced in 2007, leading the full-size, three-row crossover charge that spawned a quartet of semi-indistinct variants, including a Saturn. (Remember Saturn?) These four were truck-like in heft and capabilities, but lighter and better-mannered than their body-on-frame counterparts – and with an unusually stout 5,000-pound towing capacity. The Lambda siblings bombarded established beachheads on the sales territories occupied by minivans and truck-based SUVs. Last year, GMC moved nearly 100,000 Acadias in the US, the best year ever for the model. Now GMC shows up with a deflated Acadia for 2017, 7.2 inches shorter overall, 3.5 inches narrower, and with a 6.4-inch-shorter wheelbase. The company has even carved something like 700 pounds out of its previously portly unibody, mostly due to the size reduction but also through an increase in the percentage of high-strength steel and the use of lighter soundproofing materials. GM's C1XX platform was launched with the Cadillac XT5 earlier this year, and this GMC version is the second to appear. There's even an available four-banger, but more on that in a bit. What remains to be seen is whether the downsized Acadia represents a leaner, meaner fighter or if GMC is sending it into battle hamstrung. Outside, the new Acadia is stealthily innocuous. Gone is some of the lozenge-ness of the outgoing Acadia, but don't fret about it standing out from the crowd. The overall styling falls into lockstep with the Sierra and Canyon. The cut of the rear window, with an upsweep at the trailing edge, emulates the brand's mid-sized truck offering. A chrome mustache cuts across the front fascia below the grille, and there's more brightwork around the front side windows and at the crease below the scallop in the doors. The taillights are more contemporary than before, with an attractive elongated C element comprised of LEDs.