GMC Debuts Off-Road Sierra AT4


GMC is getting serious about off-roading. Meet the Sierra AT4, the Detroit truck staple’s latest all-terrain crusher. While the Sierra AT4 is not a direct shot across the bow of Ford’s Raptor or Ram’s Rebel, the full-size pickup was built to be capable enough to deftly tackle any unpaved adventures, while still providing an elevated and luxurious interior.


The AT4 features a 2-inch factory-installed suspension lift, standard 4WD (with a two-speed transfer case, locking rear differential and skid plates), off-road tuned Rancho monotube shocks, and 18- or 20-inch wheels with all-terrain tires. Behind that dark and imposing grille lies a naturally-aspirated 5.3L V-8, but buyers can opt to up the power ante with a 6.2L V-8 or the all-new Duramax 3.0L inline-six turbo-diesel. The later two options are mated to a 10-speed automatic transmission.

The Sierra AT4 also features GMC’s new MultiPro Tailgate, which boasts six different functions and positions. (More on that from our friends at Road & Track.) That’s at the end of an industry-first carbon fiber composite box, which helps keep things light and extremely durable.

While pricing has yet to be announced, the GMC Sierra AT4 goes on sale this fall.