Unlike other websites and magazines, our ratings are not based solely on a singular road test, but rather a more encompassing batch of criteria: quality, safety, comfort, performance, fuel economy, reliability history and value. When comparing vehicles using our Rating System, it's important to note that the rating earned by each vehicle correlates only to the models within its class. For example, a compact car cannot be compared to a SUV—They are different vehicles altogether.
You can interpret our ratings in the following way:
5-Star: Outstanding vehicle. Only the most exceptional vehicles achieve this rating.
4-Star: Very Good vehicle. Very good and close to being the best vehicle in its class.
3-Star: Good vehicle. Decent, but not quite the best. Often affordable, but lacking key features found in vehicles of the same class.
2-Star: Below average vehicle. Not recommended, and lacking attributes a car buyer would come to expect for the price.
1-Star: Poor vehicle. Simply does not deserve to be on the road.
2015 GMC Sierra 1500 OVERVIEW
The GMC Sierra 1500 aims to blend the strong payload and hauling figures of a full-size pickup with a premium SUV's style and opulence. While it shares its underpinnings with the popular Chevy Silverado, the Sierra is for those who want a bit more individuality -- and the option for more luxury in a truck.
What's New For 2015
Redesigned for 2014, the 2015 Sierra gains enhancements in the form of an eight-speed automatic for 6.2-liter models, magnetic ride control for the Denali, available spray-on bedliner for all models, Siri Eyes Free for the infotainment system and optional 4G LTE hotspot that's new across the GM lineup this year.
Choosing Your GMC Sierra 1500
Sierras come in regular, double and crew cabs, with a standard (6 1/2-foot), long (8-foot) or short (5 3/4-foot) bed for the crew cab only. Those cross-shopping the Sierra with the Silverado should note the GMC's higher price is reflected in slightly higher feature content. Many options, however, are bundled into packages that differ from what Chevrolet offers, so prices can rise a little more quickly. A 4.3-liter V6 is standard on SLE and SLT, but the 5.3-liter V8 is a very common option. Of consideration may be the 6.2-liter V8 offered on SLT and the plush Denali level, which boasts 420 horsepower and upgrades the transmission to eight speeds over the others' six.
Sierras have better equipment and a slightly better warranty than what's available from Chevy, but otherwise they're the same. Check the discounts, because a Sierra that's the same price or less than a Silverado could be the better value. That said, the Denali with its new eight-speed automatic may be among the most luxurious pickups ever -- and worth the splurge.