Here is the advertisement for the 2021 GMC Sierra 1500 AT4:

This powerful and capable 2021 GMC Sierra 1500 AT4 is ready to take on any adventure. Equipped with a robust EcoTec3 6.2L V8 engine mated to a smooth-shifting 10-speed automatic transmission, this Sierra AT4 delivers exceptional performance and capability.

- LPO, PERFORMANCE AIR INTAKE SYSTEM (dealer-installed)
- TECHNOLOGY PACKAGE
- Satin Steel Metallic exterior
- AT4 PREMIUM PACKAGE
- DRIVER ALERT PACKAGE II

This Sierra AT4 is packed with premium features to elevate your driving experience. The Bose premium audio system provides rich, immersive sound, while the 15-inch multicolor head-up display keeps important information in your line of sight. Advanced safety technologies like Forward Collision Alert, Lane Keep Assist, and Automatic Emergency Braking give you added peace of mind on the road.

The off-road-focused AT4 package adds rugged style and capability, with 18-inch all-terrain tires, an electronic locking rear differential, and an off-road-tuned suspension. You'll also enjoy the convenience of a spray-on bedliner, a 120-volt power outlet in the bed, and a suite of trailering technologies to make hauling your gear a breeze.

Step up to the premium comfort of the perforated leather-appointed front seats, which are both heated and ventilated for year-round driving enjoyment. The spacious cabin offers ample room for passengers and cargo, with a versatile split-folding rear seat.

This 2021 GMC Sierra 1500 AT4 is an exceptional choice for those seeking a capable, well-equipped, and premium full-size truck. Schedule a test drive today and experience its impressive performance and features for yourself.