GMC Offers New Off-Road Performance Upgrade for Sierra AT4


GMC is offering a new factory installed off-road performance package for its 2019 Sierra AT4 that adds 15 horsepower, and 9 ft.-lb. of torque to the standard model.

The package, which retails for nearly $5,000 and is currently available, includes:

  • 6.2L V-8 engine mated to 10-speed automatic transmission.
  • 18-inch machined aluminum wheels with Goodyear Wrangler DuraTrac tires.
  • Cat-Back Performance Exhaust System.
  • Performance Air Intake.

“The 2019 GMC Sierra AT4 debuted all-new, purposeful technologies for the premium truck segment and the new off-road performance package takes it a step farther,” says Duncan Aldred, vice president of Global GMC. “It offers optimized performance, both on- and off-road.”

The AT4 off-road performance package delivers up to 435 horsepower and 469 lb.-ft. of torque — increases of 15 horsepower and 9 lb.-ft. of torque over a Sierra equipped with a standard 6.2L V-8 engine.

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