Reduced by $3,500 since Oct 16, 2026

2020 GMC Sierra 1500 SLT



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Vehicle Information

VIN: 3GTU9DET8LG345312
Stock #: 26515A
Model Code: TK10543
  • Condition Used
  • Body Style Crew Cab
  • Exterior Color Onyx Black
  • Interior Color Jet Black, Perforated Leather-Appointed Front Seat Trim
  • Mileage 90,447
  • Fuel Economy
    City/Highway 15/20 MPG
  • Engine Engine: 3.0L, DuraMax 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.

Dealer Comments

This 2020 GMC Sierra 1500 SLT in black delivers the capability and comfort you need for work and life on your terms. With a 3.0L Duramax diesel turbocharged engine producing 277 horsepower and 460 lb-ft of torque, this 4WD truck combines efficiency with power, achieving 22 city and 26 highway MPG. The well-maintained truck arrives with a full tank of gas and includes dealer discount financing options.

- 3.0L Duramax Diesel Turbocharged Engine with 277 hp and 460 lb-ft of torque
- SLT Premium Plus Package with 20 polished aluminum wheels and chrome assist steps
- Spray-on bedliner with GMC logo and tri-fold hard tonneau cover
- Premium Bose 7-speaker sound system with GMC infotainment and navigation
- Heated and ventilated leather front seats with 10-way power adjustability
- Engine block heater for reliable cold-weather starts
- Advanced Driver Alert Packages I & II with lane departure warning and forward collision alert
- All-weather floor liners for first and second rows
- Remote vehicle starter system and keyless entry with push-button start
- Adaptive cruise control with following distance indicator
- ProGrade trailering system with integrated brake controller and hitch guidance
- 4G LTE wi-fi hotspot capability and wireless charging
- Automatic emergency braking and rear cross-traffic alert
- Ultrasonic front and rear parking assist with hitch view camera

The truck's 4WD system and heavy-duty suspension provide confident traction in any weather condition. Chrome bumpers, a chrome grille, and heated auto-dimming mirrors contribute to both its striking appearance and practical functionality. The full suite of driver assistance features—including lane keep assist, safety alert seat, and automatic high beams—helps keep you safe on every journey.

Inside, the spacious cabin features heated and ventilated front seats, a heated steering wheel, and split-folding rear seating for flexibility. The premium infotainment system with navigation, Apple CarPlay, Android Auto, and SiriusXM connectivity keeps you informed and entertained. Multiple USB ports, a 120-volt bed-mounted power outlet, and an overhead console provide convenient charging and storage solutions.

This Sierra is built for those who demand both capability and refinement. The truck bed includes a spray-on bedliner to protect your investment, while the tri-fold tonneau cover secures cargo and enhances aerodynamic efficiency. The ProGrade trailering system makes towing straightforward with integrated brake control and hitch guidance technology to assist when backing up.

The well-maintained condition of this truck reflects careful ownership. Combined with special financing available through our dealership and a full tank of gas already included, this Sierra 1500 SLT represents a smart investment in a vehicle that will serve you dependably for years to come. Contact our sales team today to arrange a test drive and experience the quality and capability this truck offers.

Eligible Benefits

All Features

  • DriveType
    • DriveType: Four Wheel Drive
  • Fuel Economy
    • City: 15 MPG
    • Hwy: 20 MPG
    • Combined: 17 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

Warranty

Uv12b|Uv12m: 12 Month 12000 Miles
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May not represent actual vehicle. (Options, colors, trim and body style may vary)

The Manufacturer's Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Dealer sets final price.