2003 Gmc Sierra 1500 on 2040-cars

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No carbon fiber was harmed in the making of new 2015 GMC Sierra Carbon Edition

Carbon fiber is known for its properties of combining amazing strength with extremely low weight, and its frequent use in high performance vehicles gives the material a somewhat aggressive air. GMC is hoping to play on some of that mean reputation with its upcoming trio of Sierra Carbon Editions. However, despite their name, there's no actual carbon making its way onto these trucks (at least in the form of CF). Instead, the special edition is a graphics package with some extra equipment thrown in.
All three specials are based on the 2015 Sierra 1500 and can be ordered in two- or four-wheel drive configuration and with the standard 4.3-liter V6 or optional 5.3-liter V8. Things kick off with the standard Sierra Carbon Edition for $33,075, including destination, available only on the double cab body. Buyers get a black grille, carbon fiber decals on the hood and tailgate and body color trim for the door handles and mirror caps. The edition also adds keyless entry, a 110-volt outlet and LED cargo box lighting.
Buyers wanting just a touch more style can opt for the Carbon 20 Edition on the SLE double cab that gets the same exterior tweaks, plus 20-inch aluminum wheels, and retails for $38,275. Finally, there is the Carbon 22 Edition starting at $42,270 on the SLE in double- or crew cab models. It adds further black 22-inch wheels, tubular side steps, fog lights, keyless start, a universal home remote, dual-zone climate control and 110-volt outlet.

2018 GMC Acadia with 'Christmas Aero' modification gets in the wind tunnel

Tis the season of "Big" - big cheer, big parties, big bowls of eggnog, big decorations, and when it comes to your family hauler, big drag. Festive drivers who festoon their crossovers, minivans, and SUVs with wreaths, Rudolph noses, fuzzy antlers, and rooftop Christmas trees undo the years of work that car engineers devote to fractional gains in fuel economy. To put numbers to such fuel-guzzling madness, GMC started with a 2018 Acadia, optioned it with the Xmas Aero Package - both Standard and Plus versions - put it in Lockheed-Martin's wind tunnel. The resulting dip in fuel economy results probably won't surprise anyone who's used a roof rack - or, for that matter, their car's air conditioning. However, it might surprise you to find out which seemingly substantial decoration had no effect, and which seemingly innocuous decoration was about twice as bad as running the A/C on its Mr. Freeze setting. Check out the brief video above for the results. And consider placement of that bow carefully.

Ford F-150, Chevy Silverado, Toyota Tundra flunk IIHS headlight test

The Insurance Institute for Highway Safety put pickup truck headlights to the test and found that the majority of them were equipped with subpar units. The 2017 Honda Ridgeline was the only truck to earn a rating of "good." The large pickup truck test was comprised of the: 2016 to 2017 GMC Sierra, 2017 Nissan Titan, 2016 Ram 1500, 2016 to 2017 Chevrolet Silverado, 2016 to 2017 Ford F-150, and 2016 to 2017 Toyota Tundra. The Sierra's headlights earned a rating of "acceptable," the headlights found on the Titan and Ram 1500 were found to be "marginal," and the ones on the Silverado, F-150, and Tundra were rated as "poor." IIHS claims the F-150 was the most disappointing out of the large pickup trucks as both its halogen and optional LED headlights failed to provide adequate visibility during testing. The Ridgeline (which earned a "good rating"), is usually considered a midsize or small truck, though IIHS included it in the field of large pickups. The headlights on the 2016 Chevrolet Colorado, 2016 GMC Canyon, 2016 Nissan Frontier, and 2016 to 2017 Toyota Tacoma, which made up the small pickup truck group, all earned a rating of "poor." The IIHS claimed the Colorado had the worst headlights of any truck that was tested, as the base vehicle's units were only able to illuminate up to 123 feet in front of the car. The Ridgeline's headlights, for reference, were able to illuminate up to 358 feet in front of the vehicle. To conduct its test, the IIHS utilizes a special tool to measure how far light is projected out of the headlights in different driving situations. The trucks' headlights were tested in a straight line and in corners, while vehicles with high-beam assist were given extra praise. The headlights on the pickup trucks also mimic the testing that was done on small SUVs and cars earlier this year. Next year, automakers will need to fit their vehicles with headlights that earn a rating of either good or acceptable to earn the IIHS Top Safety Pick+. Related Video: