As you may remember, the next-generation GMC Sierra 1500 pickup truck debuted in spring 2018. An AT4 trim with improved off-road properties was released a short while later. Today, GMC has launched the AT4 Off-Road Performance Package, which aims to boost the stock engine even further.
In its base version, the GMC Sierra AT4 pickup truck comes equipped with a 5.3L V8 engine capable of 360 hp (268 kW) and 518 Nm (382 lbft) of torque. The hi-end trim offers 426 hp (318 kW) and 624 Nm (460 lbft) of torque. The Off-Road Performance Package can be installed on the latter trim to improve it by further 15 hp and 12 Nm to a grand total of 441 hp (329 kW) and 636 Nm (469 lbft).
Along with the power upgrade, the car gets Performance intake and exhaust systems, as well as a set of 18-inch wheels clad in Goodyear tires.
The entire package costs U.S. $4,940.
Photo: GMC