2021 GMC Sierra AT4
GMC Sierra Details
6 Cyl, 3.0L
4WD
Diesel
40,413 Miles
APPRAISAL-240182551
1GTU9EET0MZ186857
1500
AT4
About This 2021 GMC Sierra
2021 GMC Sierra 1500 AT4 | 4WD | 3.0L Duramax Diesel — 40,413 Miles
Experience capability and refinement with this 2021 GMC Sierra 1500 AT4, a rugged yet refined full-size pickup ready for work or weekend adventures. Powered by a fuel-efficient 3.0L Duramax inline-6 diesel and paired with four-wheel drive, this GMC Sierra delivers strong torque, impressive towing capacity, and excellent highway fuel economy. With just 40,413 miles, it shows minimal wear and offers dependable performance for years to come.
The AT4 trim brings off-road-focused features including an elevated suspension, skid plates, all-terrain tires, and an aggressive exterior appearance. Inside, the cabin balances comfort and utility with premium seating, modern infotainment with touchscreen display, Apple CarPlay and Android Auto compatibility, and a suite of driver assistance technologies to enhance safety on every drive.
This GMC Sierra 1500 is located in Sidney, MT, making it an ideal choice for buyers in eastern Montana and neighboring regions who need a capable 4WD truck suited to varying terrain and climates. Priced competitively, this vehicle represents the best price available for comparable diesel GMC Sierra AT4 models in the area. Schedule a test drive to evaluate its towing performance, ride quality, and diesel efficiency firsthand. Financing options and vehicle history are available upon request.
Experience capability and refinement with this 2021 GMC Sierra 1500 AT4, a rugged yet refined full-size pickup ready for work or weekend adventures. Powered by a fuel-efficient 3.0L Duramax inline-6 diesel and paired with four-wheel drive, this GMC Sierra delivers strong torque, impressive towing capacity, and excellent highway fuel economy. With just 40,413 miles, it shows minimal wear and offers dependable performance for years to come.
The AT4 trim brings off-road-focused features including an elevated suspension, skid plates, all-terrain tires, and an aggressive exterior appearance. Inside, the cabin balances comfort and utility with premium seating, modern infotainment with touchscreen display, Apple CarPlay and Android Auto compatibility, and a suite of driver assistance technologies to enhance safety on every drive.
This GMC Sierra 1500 is located in Sidney, MT, making it an ideal choice for buyers in eastern Montana and neighboring regions who need a capable 4WD truck suited to varying terrain and climates. Priced competitively, this vehicle represents the best price available for comparable diesel GMC Sierra AT4 models in the area. Schedule a test drive to evaluate its towing performance, ride quality, and diesel efficiency firsthand. Financing options and vehicle history are available upon request.







