Reduced by $710 since Jul 10, 2026

2021 GMC Sierra 1500 AT4



  • $39,690 Alpine Price

    • +$690
  • Alpine Price $39,690



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Vehicle Information

VIN: 3GTU9EETXMG458203
Stock #: TG323688B
Model Code: TK10543
  • Body Style Crew Cab
  • Exterior Color Summit White
  • Interior Color Jet Black With Kalahari Accents, Perforated Leather Front Seat Trim
  • Mileage 74,478
  • Fuel Economy
    City/Highway 14/19 MPG
  • Engine Engine: Duramax 3.0L, Turbo-Diesel, Inline 6 Cylinder
  • Transmission Automatic
  • Fuel Type Diesel Fuel

Highlighted Features

Feature availability subject to final vehicle configuration. Please reference window sticker for more info.
  • Bluetooth®
  • 4WD/AWD
  • Android Auto
  • Apple CarPlay
  • Leather Seats
  • Cruise Control

Dealer Comments

Discover the capability and refinement of this 2021 GMC Sierra 1500 AT4, a full-size pickup designed to handle demanding work while delivering on-road comfort and technology.

- 3.0L I-6 Diesel Turbocharged (Duramax) with 277 hp and 460 lb-ft of torque
- 20 x 9 Machined Aluminum Wheels with Carbon Grey Metallic Accents
- Spray-On Pickup Bed Liner with AT4 Logo
- ProGrade Trailering System with Integrated Trailer Brake Controller
- Preferred Equipment Group 4SB and Trailering Package
- Heated and Ventilated Leather Front Seats
- Apple CarPlay and Android Auto Integration
- 4G LTE Wi-Fi Hotspot Capable
- HD Rear Vision Camera with Hitch Guidance and Hitch View
- Keyless Open & Start with Remote Vehicle Starter
- SiriusXM with 360L Satellite Radio
- Hill Descent Control and Auto-Locking Rear Differential
- 10-Way Power Driver and Passenger Seats with Lumbar Support
- All-Terrain Suspension with Off-Road Capabilities
- No Accidents Reported on CARFAX

This Sierra 1500 AT4 combines professional-grade capability with refined daily-use features. The turbocharged diesel engine delivers strong torque for hauling and towing while maintaining respectable fuel economy at 22 city and 26 highway MPG. Four-wheel drive and all-terrain suspension make this truck ready for any road condition, whether you're navigating mountain passes or working job sites.

The truck's trailering system includes integrated brake control and an in-vehicle trailering app, making it straightforward to manage heavy loads. The spray-on bed liner protects your cargo area against wear, while red recovery hooks and heavy-duty construction support serious work demands.

Inside, the AT4 prioritizes comfort for long hours behind the wheel. Heated and ventilated leather front seats adapt to weather and preference, while the 10-way power adjustments let you find your ideal driving position. The steering wheel offers heating for winter mornings, and the premium infotainment system with Apple CarPlay and Android Auto keeps you connected while power windows and dual-zone climate control enhance convenience.

At 74,478 miles, this Sierra 1500 AT4 has been maintained and shows no accident history on CARFAX. The white exterior with the machined aluminum wheels and carbon grey accents presents a professional appearance whether parked at the job site or in your driveway. This truck delivers straightforward capability backed by quality engineering.

Alpine offers an unconventional experience with up front pricing, a non commissioned staff, no games, and a pain free auto shopping experience. Our focus is your satisfaction and making sure you walk out the door happy, with our without a vehicle. Only at Motor City, Only at Alpine! (719)636-3881 1313 Motor City Drive, Colorado Springs, CO 80905.

Eligible Benefits

All Features

  • DriveType
    • DriveType: Four Wheel Drive
  • Fuel Economy
    • City: 14 MPG
    • Hwy: 19 MPG
    • Combined: 16 MPG
  • Fuel System
    • Fuel System: Direct Injection
  • Fuel Tank Capacity
    • Fuel Tank Capacity: 24 gal
  • Fuel Type
    • Fuel Type: Diesel Fuel
  • Horse Power
    • Horse Power: 277
  • Rear Wheel
    • Rear Wheel: Single
  • Trailering Capacity
    • Trailering Capacity: 0
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Prices include all active discounts, incentives and $689.50 dealer handling fee. Prices exclude tax, tag, title, and dealer installed accessories. $2,495 for the Alpine package which includes window tint clear bra, alpine shield, road hazard, paintless dent repair, windshield repair, and nitro fill. Additional discounts and factory rebates may be applied depending on the zip code of where the vehicle will be titled. For the maximum discount, you must purchase from in-stock inventory and finance with Ford Motor credit. Ford Motor Credit rebates, APR, and lease rates can vary based on zip code and individual credit score. While we make every effort to ensure the information listed on our website is correct, there may be instances of errors resulting in vehicle prices, options, and/or features to be listed incorrectly. The dealer is not responsible for any of these errors. Please contact a dealership sales representative for additional details and to verify the accuracy of the information on this website.

Although every reasonable effort has been made to ensure the accuracy of the information contained on this site, absolute accuracy cannot be guaranteed. This site, and all information and materials appearing on it, are presented to the user "as is" without warranty of any kind, either express or implied. All vehicles are subject to prior sale. Price does not include applicable tax, title, and license charges. ‡Vehicles shown at different locations are not currently in our inventory (Not in Stock) but can be made available to you at our location within a reasonable date from the time of your request, not to exceed one week.