Reduced by $302 since Jul 02, 2026

2021 GMC Sierra SLT



Available For Sale
  • $36,105 Lou's Price

  • Retail Price: $3,994
  • IL Doc and Filing Fee +$413
  • Lou's Price $36,105
  • *Please Note: We provide Savings on our vehicles daily based on current inventory supply. Check to see if this vehicle qualifies for a Sale Price.


Vehicle Information

VIN: 3GTU9DET3MG144306
Stock #: P2297
Model Code: TK10543
  • Body Style Crew Cab
  • Exterior Color Quicksilver Metallic
  • Interior Color Jet Black
  • Mileage 102,189
  • Engine 6 Cyl - 6 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

Experience capability, comfort, and advanced technology in this 2021 GMC Sierra 1500 SLT, now available in Rockford IL. Powered by a 6-cylinder, 3.0L Diesel engine and equipped with 4WD, this full-size pickup is built to handle demanding workdays, weekend towing, and everyday driving with confidence. The SLT trim adds a refined interior with premium materials, intuitive controls, and a spacious cabin designed for driver and passenger comfort.

Stay connected on the road with Apple CarPlay and Hands Free Bluetooth®, making it easy to access navigation, music, calls, and messages. Safety-conscious drivers will appreciate smart features such as Cross-Traffic Alert and Lane Departure Warning, while Adaptive Cruise Control helps make longer trips more relaxed and convenient.

The GMC Sierra 1500's bold styling, strong stance, and versatile bed make it a great choice for buyers looking for a dependable pre-owned truck with modern convenience and proven GMC performance. Whether you need a capable pickup for hauling, commuting, or outdoor adventures, this 2021 GMC Sierra 1500 SLT delivers the features and strength that truck shoppers want. Visit us in Rockford IL to see this impressive 4WD diesel pickup in person today.

Its clean design, confident ride, and versatile functionality make it an excellent option for work or family use. Schedule a test drive today and see how this GMC truck blends capability, technology, and refinement for work, travel, and everyday confidence on the road in all seasons and conditions around Rockford for your next dependable pickup needs today.

Eligible Benefits

All Features

  • SLT Convenience Package: Ventilated Driver and Front Passenger Seats; Heated 2nd Row Outboard Seats; Power Sliding Rear Window with Rear Defogger; 2 USB Ports (1st Row); Floor-Mounted Center Console; Front Bucket Seats; 2 USB Ports; Universal Home Remote
  • Driver Alert Package I: Ultrasonic Front and Rear Park Assist; Rear Cross Traffic Alert; Perimeter Lighting; Lane Change Alert with Side Blind Zone Alert
  • Driver Alert Package II: Forward Collision Alert; Lane Keep Assist with Lane Departure Warning; Front Pedestrian Braking; Following Distance Indicator; Automatic Emergency Braking; Safety Alert Seat; IntelliBeam Automatic High Beam On/off; Adaptive Cruise Control
  • X31 Off-Road Package: 2-Speed Transfer Case; Hill Descent Control; Dual Exhaust with Premium Tips; Off-Road Suspension; Skid Plates; Heavy-Duty Air Filter; X31 Hard Badge
  • SLT Premium Plus Package: 20" X 9" Polished Aluminum Wheels; Chrome Wheel to Wheel Assist Steps; Spray-On Pickup Bed Liner with GMC Logo; 10-Speed Automatic Transmission
  • Preferred Equipment Group 4SA: LED Cargo Area Lighting; Remote Vehicle Starter System; Electric Rear-Window Defogger; Theft Deterrent System (unauthorized Entry); Chrome Grille; 170 Amp Alternator; Auxiliary External Transmission Oil Cooler; Compass; Electrical Lock Control Steering Column; Trailering Package; 120-Volt Instrument Panel Power Outlet; Heated Driver and Front Outboard Passenger Seating; Steering Wheel Audio Controls; GMC Connected Access Capable; Color-Keyed Carpeting Floor Covering; OnStar and GMC Connected Services Capable; Power Front Passenger Windows with Express Up/down; Deep-Tinted Glass; Power Rear Windows with Express Down; Integrated Trailer Brake Controller; Single Speed Transfer Case; Power Front Windows with Driver Express Up/down; Manual Tilt-Wheel and Telescoping Steering Column; Rear Dual USB Charging-Only Ports; Front Frame-Mounted Black Recovery Hooks; Keyless Open and Start; 4G LTE Wi-Fi Hotspot Capable; ProGrade Trailering System; Rear Wheelhouse Liners; 12-Volt Rear Auxiliary Power Outlet; Auto-Locking Rear Differential; Power Door Locks
  • SLT Preferred Package: Premium Bose 7-Speaker Sound System; Wireless Charging; Premium GMC Infotainment System Radio with Navigation
  • 20" X 9" Polished Aluminum Wheels
  • Chrome Wheel to Wheel Assist Steps
  • Spray-On Pickup Bed Liner with GMC Logo
  • Quicksilver Metallic
  • 275/60R20SL AT BW Tires
  • Apple CarPlay/Android Auto smart device mirroring
  • Forward Collision Alert with Automatic Braking
  • Front Pedestrian Braking
  • 4G LTE Wi-Fi Hotspot capable mobile hotspot internet access
  • HD Rear Vision Camera w/Hitch View rear mounted camera
  • Lane Keep Assist with Lane Departure Warning
  • Adaptive cruise control
  • Brake assist system
  • Cruise control with steering wheel mounted controls
  • Ventilated driver and front passenger seats
  • Integrated navigation system
  • Keyfob remote start
  • Heated steering wheel
  • Heated driver and front passenger seats
  • Heated rear seats
  • Leather front seat upholstery
  • Primary monitor touchscreen
  • Rear Cross-Traffic Alert collision warning
  • Driver seat power reclining
  • lumbar support
  • cushion tilt
  • fore/aft control and height adjustable control
  • AutoTrac part and full-time 4WD
  • Duramax 3L I-6 diesel direct injection
  • DOHC
  • variable valve control
  • intercooled turbo
  • diesel
  • engine with 277HP
  • Duramax 3L I-6 DOHC
  • Front wireless smart device charging
  • Teen Driver restricted driving mode/alerts
  • Smart key with hands-free access and push button start
  • Keyfob window control
  • Push-button
  • Bluetooth® wireless audio streaming
  • Hitch Guidance vehicle to trailer hitching assist
  • Lane Change Alert with Side Blind Zone Alert blind spot warning
  • Following Distance Indicator
  • GMC ProGrade Trailering System trailer light test
  • GMC ProGrade Trailering System trailer light malfunction warning
  • GMC ProGrade Trailering System trailer theft alarm
  • Dual-zone front climate control
  • IntelliBeam auto high-beam headlights
  • Immobilizer
  • Bose speakers
  • Bluetooth® handsfree wireless device connectivity
  • Trailer brake controller
  • Trailer Sway Control (TSC) trailer sway control
  • Trailering Assist Guidelines vehicle and trailer reverse assist with visual graphic guidance only
  • Premium GMC Infotainment System external memory control
  • Internet radio capability
  • StabiliTrak w/Proactive Roll Avoidance electronic stability control system with anti-roll
  • Hill Descent Control (HDC)
  • Hill Start Assist (HSA)
  • Automatic climate control
  • Rear seat check warning
  • UltraSonic front and rear parking sensors
Vehicles You Might Like

2017 RAM 1500 Laramie

Price Drop
VIN: 1C6RR7NG5HS750612
Stock: 126345B
Model: DS6P98
  • $21,888 MSRP


2018 RAM 1500 Express

Price Drop
VIN: 1C6RR7KT4JS331738
Stock: P2169
Model: DS6L98
  • $25,994 MSRP


2016 RAM 1500 Rebel

Price Drop
VIN: 1C6RR7YT5GS289712
Stock: 826221A
Model: DS6X98
  • $23,894 MSRP


2017 Chevrolet Silverado LT

Price Drop
VIN: 3GCUKREC9HG100589
Stock: P2119A
Model: CK15543
  • $25,894 MSRP


Advertised prices do not include tax, title, license, and documentation fees. Please see dealer for full details.

All vehicle prices exclude applicable taxes, title, license, registration, finance charges, emissions testing fees, and any other fees required by law or by the selling dealer, lender, or governmental agency, unless otherwise expressly stated. Out-of-state purchasers are responsible for all taxes, title, registration, and government fees applicable in the state where the vehicle will be registered.

Unless otherwise noted, advertised prices include manufacturer incentives available to the dealer. Manufacturer incentives, rebates, and special offers are subject to eligibility requirements, program rules, and expiration dates. Not all customers will qualify for every incentive or rebate advertised. Offers may not be combined and eligibility may depend on factors including, but not limited to, residency, current vehicle ownership or lease status, military service, college graduate status, loyalty, conquest eligibility, or financing through a designated lender. Dealer sets final price. Contact the dealership for complete program details, eligibility requirements, and final pricing.

Vehicle prices, payments, specifications, equipment, incentives, availability, and other information are believed to be accurate but are not guaranteed and are subject to change without notice. Dealer is not responsible for typographical, pricing, data transmission, or other administrative errors or omissions. Please verify all pricing, incentives, equipment, options, colors, accessories, trim levels, payments, and vehicle availability with the dealership prior to purchase.

Vehicle descriptions and information are based on manufacturer data and standard equipment and may not reflect the exact vehicle offered for sale. Images, videos, and other visual representations are for illustration purposes only and may not depict the actual vehicle. Options, colors, accessories, trim levels, body styles, packages, and other features may vary. All vehicles are subject to prior sale.

EPA fuel economy estimates are provided for comparison purposes only. Actual mileage will vary based on driving conditions, vehicle maintenance, driving habits, weather, road conditions, and other factors.