**2025 GMC Sierra 1500 AT4 | Duramax Diesel | Sunroof | Technology Package**Take on every drive with confidence in this rugged and refined **2025 GMC Sierra 1500 AT4 Crew Cab 4x4**. Powered by the highly sought-after **3.0L Duramax Turbo-Diesel engine** and paired with a smooth 10-speed automatic transmission, this Sierra delivers excellent torque, capability, and fuel efficiency.The AT4 package combines serious off-road equipment with a premium, comfortable interior making it equally suited for demanding jobs, weekend adventures, and everyday driving.**Key Features:*** 3.0L Duramax Turbo-Diesel engine* 10-speed automatic transmission* Four-wheel drive* Power sunroof* Technology Package* Head-up display* Bose premium speaker system* AT4 off-road suspension with factory 2-inch lift* Rancho monotube shocks* Skid plates and hill descent control* Automatic locking rear differential* Leather-appointed interior* Heated and ventilated front seats* Heated steering wheel* Heated rear outboard seats* Remote start* GMC MultiPro tailgate* Spray-in bedliner* 13.4-inch touchscreen with Google built-in* Wireless Apple CarPlay and Android Auto* Digital Driver Information Centre* Rear vision camera* Forward collision alert* Automatic emergency braking* Lane keep assist with lane departure warning* Spacious Crew Cab seatingWith bold AT4 styling, impressive Duramax diesel performance, advanced technology, and premium comfort throughout, this Sierra is ready for work, play, and everything in between.About Peter Boyer Chevrolet Buick GMC Proudly serving Napanee and surrounding communities for over 30 years, Peter Boyer Chevrolet Buick GMC is your trusted destination for new and pre-owned vehicles. Drivers from Kingston, Belleville, Trenton, Brighton, Picton, and beyond choose us for our exceptional selection, competitive pricing, and commitment to customer satisfaction. Our knowledgeable and professional team is ready to assist with all your automotive needs, including sales, financing, service, and genuine GM parts. Experience the Boyer difference today and see why customers across Eastern Ontario continue to choose Peter Boyer Chevrolet Buick GMC year after year. We are a proud member of the Boyer Auto Group.