The 2013 GMC Sierra has a puzzling mix of crash-test scores that might put some doubt into your mind, although its list list of safety technology is reassuring.Although safety scores hadn't yet been extended to the 2013 Sierra at the time of posting, the 2012 model received a mix of five- and four-star ratings from the federal government, depending on body styles. Crew Cab four-doors get an overall rating of five stars, as Regular and Extended Cab models earn four stars overall. Every Sierra gets the NHTSA's top score for side-impact safety.
On the other hand, the Insurance Institute for Highway Safety (IIHS) calls the Sierra's front-impact protection "good," and says its side protection is "acceptable"--but in a new roof-crush test, the Sierra gets a "marginal" rating.
Side curtain airbags, stability control, and anti-lock brakes are included in all Sierra models, as is OnStar hardware. Power-adjustable pedals may help very short drivers get more comfortable, and we do recommend the optional rearview camera system, which can help visibility over the tall tailgate when backing up. Also for 2013, all Sierra models with the six-speed automatic transmission get a new grade braking feature to enhance stability when towing downhill.