A new air intake and cat-back exhaust help add 15 horsepower.
General Motors has detailed a new Off-Road Performance Package for the 2019 GMC Sierra AT4.
The truck's 6.2-liter V8 has been paired with a performance air intake and upgraded cat-back exhaust system, delivering 435 horsepower and 469 pound-feet of torque -- an increase of 15 horsepower and nine pound-feet of torque compared to the standard build.
Complementing the performance-focused upgrades, the package also features 18-inch machined aluminum wheels wrapped in Goodyear Wrangler DuraTrac tires.
The AT4 trim already includes a two-inch factory lift, locking rear differential, skid plates, off-road-tuned Rancho dampers, MultiPro tailgate and plenty of chrome.
The AT4 trim already includes a two-inch factory lift, locking rear differential, skid plates, off-road-tuned Rancho dampers, MultiPro tailgate and plenty of chrome.
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