Vehicle Details
Discover exceptional value with this 2021 GMC Sierra 1500 SLT, a low-mileage gem located in Platteville, WI. With only 16,329 miles, this rugged 4WD pickup features a fuel-efficient 6-cylinder 3.0L diesel engineâ"perfect for towing, long drives, and tough Wisconsin winters. Ready to conquer trails or handle daily work, the Off-Road Package enhances capability and confidence on rough terrain. Inside, enjoy premium comfort with leather seats and a refined SLT cabin that combines style with utility. Apple CarPlay keeps your phone connected for navigation, music, and hands-free calls, while the back-up camera adds safety and convenience when parking or maneuvering heavy loads. Remote start ensures a warm, comfortable ride before you step inside on chilly Platteville mornings. This GMC Sierra offers the best price for its condition and featuresâ"competitively priced to sell quickly. Low mileage, diesel efficiency, and a loaded feature set make this an outstanding choice for buyers seeking reliability, performance, and modern tech in a capable 4WD truck. Whether you need a work-ready pickup or a weekend adventurer, this GMC Sierra 1500 SLT checks every box. Located in Platteville, WI, this 2021 GMC Sierra 1500 SLT is priced to move and ready for immediate delivery. Contact us today to schedule a test drive and experience why this low-mileage diesel GMC Sierra is the smart buy for discerning truck buyers.
Equipment
This model comes equipped with Android Auto for seamless smartphone integration on the road. The steering wheel audio controls on this vehicle keep the volume and station within easy reach. See what's behind you with the back up camera on it. This unit has a clean AutoCheck report. This GMC Sierra offers Apple CarPlay for seamless connectivity. This model keeps you comfortable with Auto Climate. This 2021 GMC Sierra 1500's AutoCheck: 1 owner, assurance of single-owner history for peace of mind. Bluetooth technology is built into it, keeping your hands on the steering wheel and your focus on the road. Never get into a cold vehicle again with the remote start feature on the GMC Sierra. The leather seats in this model are a must for buyers looking for comfort, durability, and style. An off-road package is equipped on the GMC Sierra. This model is pure luxury with a heated steering wheel.
Packages
X31 Off-Road and Protection Package: 20 X 9 Polished Aluminum Wheels; 275/60R20SL AT BW Tires; Spray-On Pickup Bed Liner with GMC Logo; All-Weather Floor Liner. 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. 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; Front 40/20/40 Split-Bench Seat; 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; Premium GMC Infotainment System Radio with Multi-Touch; 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. 20 X 9 Polished Aluminum Wheels. Spray-On Pickup Bed Liner with GMC Logo. Quicksilver Metallic. All-Weather Floor Liner. 275/60R20SL AT BW Tires. **Equipment listed is based on original vehicle build and subject to change. Please confirm the accuracy of the included equipment by calling the dealer prior to purchase.**
Used 2021 GMCSierra SLT
- Exterior Color
- Quicksilver Metallic
- Interior Color
- Jet Black
- Odometer
- 16,329 miles
- Transmission
- 10-speed automatic
- Drivetrain
- 4WD
- Engine
- 6 Cyl, 3.0L
- VIN
- 1GTU9DET8MZ419815
- Stock Number
- MZ419815
GMC
Sierra
Highlighted Features
- Leather upholstery
- Automatic temperature control
- Wireless phone connectivity
- Front dual zone A/C
- Auto-dimming rearview mirror
- Split folding rear seat
- Memory seat
- Heated front seats
- Perimeter/approach lights
- Remote keyless entry
- Heated steering wheel
- Steering wheel mounted audio controls
Included Packages & Accessories
- X31 Off-road AND Protection Package Discount
- SLT Package
- Gvwr 7;200 Lbs. (3;266 KG)
- 50-STATE Emissions
- DESTINATION CHARGE
- Quicksilver Metallic
- Rear Axle 3.23 Ratio
- Eng: Duramax 3.0L Turbo-diesel
- Transmission: 10-SPEED Auto
- Customer Dialogue Network
- X31 Off-road AND Protection Package
- Credit-not Equipped W/ HD Radio
- X31 Off-Road and Protection Package: 20 X 9 Polished Aluminum Wheels; 275/60R20SL AT BW Tires; Spray-On Pickup Bed Liner with GMC Logo; All-Weather Floor Liner
- 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
- 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; Front 40/20/40 Split-Bench Seat; 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; Premium GMC Infotainment System Radio with Multi-Touch; 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
- 20 X 9 Polished Aluminum Wheels
- Spray-On Pickup Bed Liner with GMC Logo
- All-Weather Floor Liner
- 275/60R20SL AT BW Tires
- Apple CarPlay/Android Auto smart device mirroring
- 4G LTE Wi-Fi Hotspot capable mobile hotspot internet access
- HD Rear Vision Camera w/Hitch View rear mounted camera
- Brake assist system
- Cruise control with steering wheel mounted controls
- Keyfob remote start
- Heated steering wheel
- Heated driver and front passenger seats
- Leather front seat upholstery
- Primary monitor touchscreen
- 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
- 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
- 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
- Immobilizer
- 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
- 1 exterior 120V AC power outlet
- LED daytime running lights
- LED brake lights
- LED front fog lights
- Leather and metal-look steering wheel
- EZ Lift
- EZ Lower
- Integrated tailgate step
- Trailer hitch light
- Manual rear child safety door locks
- Heated driver and passenger side door mirrors
- Power driver and passenger door mirrors with tilt down in reverse
- Auto-dimming driver side mirror
- Power folding door mirrors
Included Packages & Options
Included Options
- All-Weather Floor Liner$210
Standard Specifications
- 1-touch down
- 1-touch up
- Air conditioning
- Auto-dimming rearview mirror
- Automatic temperature control
- Driver door bin
- Driver vanity mirror
- Front beverage holders
- Front dual zone A/C
- Heated steering wheel
- Illuminated entry
- Memory seat
- Overhead console
- Passenger door bin
- Passenger vanity mirror
- Power windows
- Proximity key: doors and push button start
- Rear beverage holders
- Rear door bins
- Remote engine start: keyfob
- Remote keyless entry
- Speed control
- Telescoping steering wheel
- Tilt steering wheel
- Alloy wheels
- Front anti-roll bar
- Front wheel independent suspension
- Power steering
- Speed-sensing steering
- 1st row LCD monitors: 2
- Primary LCD size: 8.0"
- Radio data system
- Smart device integration: Android Auto/Apple CarPlay
- Steering wheel mounted audio controls
- Wireless phone connectivity: Bluetooth
- Heated front seats
- Leather upholstery
- Power 2-way driver lumbar support
- Power 2-way passenger lumbar support
- Power driver seat
- Power passenger seat
- Rear seat center armrest
- Rear seats: split-bench
- Rear seats Folding position: fold-up cushion
- Seat Upholstery: leather
- Split folding rear seat
- Drive type: four-wheel
- Engine location: front
- Fuel economy city: 14mpg
- Fuel economy combined: 16mpg
- Fuel economy highway: 20mpg
- Fuel tank capacity: 24.0gal.
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Rear locking differential
- Standard fuel economy fuel type: gasoline
- Variable valve control
- Ground clearance (min): 205mm (8.1")
- Auto-dimming door mirrors
- Bumpers: chrome
- Door mirrors: chrome
- Heated door mirrors
- Left rear passenger door: conventional
- Power door mirrors
- Rear cargo: tailgate
- Rear step bumper
- Right rear passenger: conventional
- Trailer hitch receiver
- Trailer sway control
- Exterior body width: 2,063mm (81.2")
- Exterior height: 1,918mm (75.5")
- Exterior length: 5,885mm (231.7")
- Front headroom: 1,093mm (43.0")
- Front hiproom: 1,554mm (61.2")
- Front legroom: 1,131mm (44.5")
- Front shoulder room: 1,677mm (66.0")
- Rear headroom: 1,019mm (40.1")
- Rear hiproom: 1,530mm (60.2")
- Rear legroom: 1,102mm (43.4")
- Rear shoulder room: 1,655mm (65.2")
- Wheelbase: 3,744mm (147.4")
- Appearance: analog
- Compass
- Delay-off headlights
- Front fog lights
- Front reading lights
- Fully automatic headlights
- Low tire pressure warning
- Oil pressure gauge
- Outside temperature display
- Rear reading lights
- Rear window defroster
- Tachometer
- Trip computer
- Variably intermittent wipers
- Voltmeter
- 4 wheel disc brakes
- ABS brakes
- Brake assist
- Dual front impact airbags
- Dual front side impact airbags
- Electronic stability
- Ignition disable
- Occupant sensing airbag
- Overhead airbag
- Panic alarm
- Perimeter/approach lights
- Security system
- Traction control
Dealer Notes
KBB.com Consumer Reviews

Overall4Out of 5
- 3.0
Nice truck
By froggy | on Sunday, December 06, 2020
I purchased this truck brand new and at 3900 miles I started to have a misfire. The warranty put a refurbished rebuilt engine in it. I was not aware that the warranty doesn't put new parts in just refurbished rebuilt parts. I traded in and lost my favorite blue truck. Not a fan of the whole process. Love the truck just not how the warranty went. I would not own another brand or model the 2020 is the nicest riding and looking. Just got a bad motor from the manufacture.… - 5.0
Great Truck
By Mel | on Sunday, April 25, 2021
I love it, I get compliments every where I go, and it apparently worth more than I paid for it brand new, a year and a half later. can't ask for much more than that.… - 5.0
Well done GM
By Tony | on Thursday, November 26, 2020
This truck has a 10 speed transmission that you can barely feel it shift. Traded in an F150 and test drove a similar equipped Ram. Although the Ram was nice, the styling of the GMC won me over, along with the tailgate! It also pulls my boat way better than the Ford, just smoother all around. The cabin is very quiet and the gas mileage is much better than V8 Ford. The cabin is super quiet and the ride is awesome. Love the adaptive cruise control too. The technology is fine and the screen is plenty big. Remember, you are driving this truck, not going to thr drive in! Most importantly, the controls are simple to use and Bose stereo sounds great! Oh, and I got it cheaper than the similar Ram too!…
Based on 88 consumer ratings for 2019–2026 models. | Privacy
* The advertised price does not include sales tax, vehicle registration fees, other fees required by law, finance charges and any documentation charges. A negotiable administration fee, up to $115, may be added to the price of the vehicle.
* Images, prices, and options shown, including vehicle color, trim, options, pricing and other specifications are subject to availability, incentive offerings, current pricing and credit worthiness.
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