Standard driver assistance technology is limited to the government-mandated rearview camera. The $890 Driver Alert Package I for the Sierra through the AT4 provides front and rear parking sensors, lane departure warning, blind-spot monitoring with rear-cross traffic alert, and perimeter lighting.
The Driver Alert Package II for the SLE, SLT, and AT4 tacks on lane keeping assist, automatic high beams, a vibrating safety alert in the driver seat, forward collision warning, and automatic emergency braking for $645. Although adaptive cruise is available on GMC's regular-duty pickups, it's still not offered on the 2500HD.
Beyond that, the SLT Preferred Package ($1,670) includes a bed-view camera and surround vision with two trailer views. These items are available in the AT4 Preferred Package, priced at $2,075. The AT4 is also eligible for a $1,475 Technology Package with a rearview camera mirror, a head-up display, and an 8-inch driver information display.
The Denali comes standard nearly everything offered on the lower trims. The only remaining features – the camera mirror and head-up display – are available in the Denali Technology Package for $1,275.