700 Banner


2021 GMC Sierra 1500 SLE

ONE OWNER, GOOD MILES, BABY DIESEL.

$32,488
83,234 Miles
3GTU9BET3MG256690
Stock #: 256690
CARFAX 1-Owner Good Value Badge
Drivetrain 4WD
Interior Jet Black
Exterior Summit White
Transmission 10-Speed Shiftable Automatic
Engine 6cyl - 3.0L
Fuel Type Diesel
MPG City 22
MPG Highway 26

Payment Calculator

This calculation is only an estimate and is not an accurate representation of the actual monthly payment. Interest rate and term are subject to credit approval. It may include other taxes, fees, regulatory charges, etc.

Description

FOR SALE: 2021 GMC Sierra 1500 SLE – One-Owner "Baby Diesel" – Clean & Efficient!

This well-maintained 2021 GMC Sierra 1500 SLE is powered by the fuel-efficient 3.0L Duramax "Baby Diesel" turbo-diesel engine, delivering strong torque and impressive MPG. One-owner truck with a clean history, no accidents, and ready for work or play.

Key Features:3.0L Duramax Turbo-Diesel – Great power & towing (up to 9,300 lbs) with excellent fuel economy ? SLE Trim – Comfortable cloth seats, touchscreen infotainment, Apple CarPlay/Android Auto ? One Owner, No Accidents – Always garaged & serviced on time ? Factory Warranty Remaining – Peace of mind for the new owner ? Clean & Stock – No modifications, all-original condition

Ideal for towing, highway cruising, or daily driving without sacrificing efficiency.

Welcome to Big Jon’s Auto – Denver’s Trusted Family-Owned Dealership!

For over 50 years, Big Jon’s Auto has been helping Colorado drivers find their perfect ride. As a family-owned business, we are dedicated to making the car-buying experience simple, stress-free, and enjoyable.

Why Choose Us?

  • No Hassle, No Pressure – We keep it straightforward and honest.
  • Great Prices – Competitive deals that fit your budget.
  • Fast & Easy – Drive off in your new car in under 15 minutes.
  • Local & Family-Owned – Proudly serving Denver with a personal touch.
  • Flexible Financing – We work with over 15 credit unions and lenders to help you get approved and find a payment plan that works for you.

Visit Us Today! 1240 W Center Ave, Denver, CO 80223 Find the perfect car, truck, or SUV to explore Colorado in style. We look forward to welcoming you to the Big Jon’s family!


Equipment
Seats
Driver seat: heated
Driver seat power adjustments: height, lumbar, reclining, 10
Front headrests: adjustable, 2
Front seat type: 40-20-40 split bench
Passenger seat: heated
Passenger seat manual adjustments: reclining, 4
Rear headrests: adjustable, 3
Rear seat folding: folds up
Rear seat type: 60-40 split bench
Upholstery: cloth
Brakes
ABS: 4-wheel
Braking assist:
Electronic brakeforce distribution:
Front brake diameter: 13.6
Front brake type: ventilated disc
Front brake width: 1.18
Power brakes:
Rear brake diameter: 14.2
Rear brake type: ventilated disc
Rear brake width: 0.79
Engine
Alternator: 220 amps
Auto start/stop:
Battery: heavy duty, maintenance-free
Battery rating: 730 CCA
Battery saver:
Lights
Daytime running lights: LED
Headlights: LED, auto delay off, auto on/off, wiper activated
Taillights: LED
Safety
Camera system: rearview
Check rear seat reminder:
Child safety door locks:
Child seat anchors: LATCH system
Programmable safety key:
Rearview monitor: in dash
Airbags
Airbag deactivation: occupant sensing passenger
Front airbags: dual
Side airbags: front
Side curtain airbags: front, rear
Mirrors
Side mirror adjustments: manual folding, power
Side mirrors: heated
Windows
Front wipers: variable intermittent
Power windows: safety reverse
Tinted glass:
Window defogger: rear
Security
Anti-theft system: alarm, vehicle immobilizer
Power door locks: anti-lockout, auto-locking
Seatbelts
Emergency locking retractors: front
Front seatbelts: 3-point
Rear seatbelts: 3-point
Seatbelt pretensioners: front
Seatbelt warning sensor: front
Drivetrain
4WD selector: electronic
4WD type: part time w/ on demand setting
Axle ratio: 3.42
Locking differential: rear
Suspension
Front shock type: twin-tube gas
Front spring type: coil
Front stabilizer bar: diameter 33 mm
Front struts:
Front suspension classification: independent
Front suspension type: upper and lower control arms
Rear shock type: twin-tube gas
Rear spring type: leaf
Rear suspension classification: solid live axle
Rear suspension type: multi-leaf
Telematics
Driver assistance app: roadside assistance
Electronic messaging assistance: voice operated, with read function
Phone: voice operated
Satellite communications: OnStar, voice guided directions
Smart device app compatibility: myGMC with Connected Access
Smart device app function: maintenance status
Wi-Fi: hotspot
Wireless data link: Bluetooth
Audio System
Antenna type: diversity, mast
Auxiliary audio input: Bluetooth, USB, iPod/iPhone
Radio: AM/FM, touch screen display
Radio data system:
Satellite radio: SiriusXM
Speed sensitive volume control:
Total speakers: 6
Tires and Rims
Spare tire mount location: underbody
Spare tire size: full-size
Spare wheel type: steel
Tire Pressure Monitoring System:
Tire type: all season
Wheels: painted aluminum
Instrumentation
Clock:
Compass:
Digital odometer:
Engine hour meter:
External temperature display:
Fuel economy display: MPG, range
Gauge: oil pressure, tachometer
Instrument cluster screen size: 4.2 in.
Multi-function display:
Trip odometer:
Warnings and reminders: coolant temperature warning, lamp failure, low battery, low fuel level, low oil pressure, maintenance due
Air Conditioning
Air filtration:
Front air conditioning: automatic climate control
Front air conditioning zones: dual
Rear vents: second row
Comfort Features
Armrests: front center
Door trim: simulated wood
Floor mat material: rubber/vinyl
Floor material: carpet
Floor mats: front, rear
Heated steering wheel:
Steering wheel trim: leather
Exterior Features
Active grille shutters:
Bumper detail: rear step
Door handle color: body-color
Exhaust tip color: stainless steel
Fender lip moldings: black
Front bumper color: chrome
Grille color: chrome, chrome surround
Mirror color: chrome
Pickup bed light: LED
Rear bumper color: chrome
Tailgate: lift assist, power locking, power open, removable
Window trim: chrome
Towing and Hauling
Pickup bed cargo management: tie-down anchors
Tow hooks: front
Tow/Haul mode:
Trailer hitch:
Trailer wiring: 4-pin, 7-pin
Convenience Features
Assist handle: front, rear
Capless fuel filler system:
Cruise control:
Cupholders: front
Multi-function remote: panic alarm, proximity entry system
One-touch windows: 4
Power outlet(s): 12V front, 12V rear, USB front, USB rear
Power steering:
Power windows: lockout button
Push-button start:
Reading lights: front
Rearview mirror: manual day/night
Remote engine start:
Steering wheel: tilt and telescopic
Steering wheel mounted controls: audio, cruise control, multi-function, phone, voice control
Storage: door pockets, front seatback, in seat cushion
Sun visors:
In Car Entertainment
Connected in-car apps: Google POIs, Google search
Infotainment: GMC Infotainment System
Infotainment screen size: 8 in.
Smartphone integration: Android Auto, Apple CarPlay
Stability and Traction
Hill holder control:
Roll stability control:
Stability control:
Traction control:
Trailer stability control:

Disclaimer: Prices do not include government fees and taxes, any finance charges, any electronic filing charge and any emission testing charge. Prices may not include Dealer Delivery and Handling Charges. We update our website inventory frequently, but our inventory changes with recent sales. Mileage may change slightly due to test drives. We are not responsible for any errors or omissions on this page. Please feel free to call us before you visit.

Payment Calculator

This calculation is only an estimate and is not an accurate representation of the actual monthly payment. Interest rate and term are subject to credit approval. It may include other taxes, fees, regulatory charges, etc.

Similar Vehicles

Text Us