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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 considering new powertrain options for large SUVs

Aside from the new General Motors offerings, there's not a whole lot of action going on in the fullsize SUV segment. That doesn't seem to be stopping GM from pushing the envelope in the market as Automotive News is reporting that the automaker is looking to introduce some new powertrain options into the Chevy Tahoe (and Suburban), GMC Yukon (and Yukon XL) and the Cadillac Escalade - all have been redesigned for the 2015 model year.
Now, we already know that GM and Ford are collaborating on nine- and ten-speed transmissions for a broad range of applications (including the big SUVs), but this new report says that GM is also considering other options as a way to one-up the competition and, of course, to optimize fuel economy. AN quotes Jeff Luke, executive chief engineer for GM trucks, as saying that "interesting powertrain technologies" are coming including a return of a hybrid SUV and possibly even a diesel engine. Although it sounds like the latter could come down to how customers respond to the 2014 Jeep Grand Cherokee EcoDiesel.

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.