Reduced by $1,298 since Jul 17, 2026

2021 GMC Sierra 1500 SLT



  • $7,644 Savings + All Fees Included
    $35,829 COAST PRICE

  • Retail Price $42,175
    • +$999
    • +$299
  • Savings -$7,644
  • Coast Price $35,829


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Vehicle Information

VIN: 1GTU9DET3MZ274912
Stock #: Z375154A
Model Code: TK10543
  • Condition Used
  • Body Style 4D Crew Cab
  • Exterior Color Sky
  • Interior Color Jet Black
  • Mileage 94,421
  • Fuel Economy
    City/Highway 22/26 MPG
  • Engine 6 Cyl - 3 L
  • Transmission 10-Speed Automatic
  • Fuel Type Diesel

Highlighted Features

Feature availability subject to final vehicle configuration. Please reference window sticker for more info.

Dealer Comments

Meet the 2021 GMC Sierra 1500 SLT, a capable work truck built to handle whatever demands you place on it. This isn't just another pickup—it's engineered for those who need dependable power, advanced technology, and genuine craftsmanship.

- 3.0L Duramax I-6 Diesel Turbocharged engine with 277 hp and 460 lb-ft of torque
- 10-speed automatic transmission with 4WD
- SLT Premium Plus Package with premium appointments and technology
- X31 Off-Road Package with Hill Descent Control and skid plates
- Off-road suspension for uneven terrain
- Premium Bose 7-speaker sound system with premium GMC Infotainment and navigation
- SiriusXM with 360L satellite radio
- Adaptive Cruise Control with Lane Keep Assist and Lane Departure Warning
- Heated and ventilated front seats with 10-way power adjustment
- 20-inch polished aluminum wheels with all-terrain tires
- ProGrade Trailering System with integrated trailer brake controller
- Spray-on pickup bed liner with GMC logo
- Dual exhaust with premium tips
- Chrome assist steps and chrome grille

The diesel engine delivers the torque you need for towing and hauling while maintaining reasonable fuel efficiency. You'll see 22 mpg in the city and 26 mpg on the highway, allowing you to go further between fill-ups. The 10-speed automatic transmission works seamlessly across all driving conditions, and the 4WD system with multiple terrain modes gives you confidence on any surface.

The SLT Premium Plus Package transforms this truck into a refined driving experience. Dual zone automatic climate control keeps you and your passengers comfortable regardless of conditions. Heated and ventilated front seats with power adjustments mean you find your perfect seating position every time you climb into the cab. The steering wheel is also heated, adding another layer of comfort during cold mornings.

Technology and safety work together seamlessly in this Sierra. The Adaptive Cruise Control maintains your desired distance from vehicles ahead, while Lane Keep Assist and Lane Departure Warning help you stay centered in your lane. Automatic Emergency Braking, Forward Collision Alert, and Rear Cross Traffic Alert add multiple layers of protection. The Ultrasonic Front and Rear Park Assist takes the guesswork out of tight spaces.

The X31 Off-Road Package prepares you for adventures beyond the pavement. Hill Descent Control manages steep downhill grades automatically, while skid plates protect vulnerable undercarriage components. The off-road suspension soaks up bumps and ruts, and the heavy-duty air filter keeps dirt out of the engine in dusty conditions. The 2-speed transfer case gives you true low-range capability when the terrain demands it.

For those who tow, the ProGrade Trailering System with integrated trailer brake controller takes the complexity out of the equation. Hitch View and Hitch Guidance help you line up perfectly every time, while the in-vehicle trailering app provides real-time information. The spray-on bedliner protects your investment from the wear and tear of loading, unloading, and everyday use.

This Sierra 1500 SLT represents a solid choice for someone who values capability, technology, and comfort in one package. Come see it in person and discover why this truck has earned its reputation for dependable performance.

Eligible Benefits

All Features

  • DriveType
    • DriveType: Four Wheel Drive
  • Fuel Economy
    • City: 14 MPG
    • Hwy: 20 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 discounts, rebates, or trade assistance, when applicable. Does not include the $999 dealer fee and $299.75 electronic filing fee. Online sales price reflects payment by cash, certified funds, or dealer assisted finance. Financing offers subject to credit approval. Prices, specifications, and availability subject to change without notice. Contact dealer for most current information.

May not represent actual vehicle. (Options, colors, trim and body style may vary). Prices and payments may not include reconditioning fees.

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