2021 GMC Sierra 1500 Offers Brand-New AT4 Value Package
Photo: GMC
The GMC Sierra 1500 gained several new features for the 2021 model year, including trailering technology like the Trailer Length Indicator and Jack-Knife Alert. Now, the light-duty truck is also offering a new AT4 Value Package, which adds the Driver Alert Package, the AT4 Preferred Package, and blackwall Goodyear Wrangler DuraTrac tires to the AT4 trim.
The Driver Alert Package
The Driver Alert Package consists of perimeter lighting and three driver-assistance features. Its Front and Rear Park Assist gives distance alerts to any nearby objects while you park. As you back out of a parking spot, Rear Cross Traffic Alert detects and warns of traffic behind the Sierra 1500. Once on the road, Lane Change Alert with Side Blind Zone Alert warns when a vehicle is in your side blind zone so that you know not to switch lanes.
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