2020 GMC Sierra 1500 Denali
$1,880 less than this car
- 85,743 mi
- 4WD
- Automatic
- Diesel
- Truck
Dave Sinclair Buick GMC · St Louis, MO · 0 mi away
118,827 miles · truck

Why BUY from Dave Sinclair Buick GMC? When you choose this Ebony Twilight Metallic 2021 GMC Sierra 1500 Denali with 118,827 miles, you are not just buying a used vehicle - you are investing in quality, reliability and peace of mind. Our clientele depend on us for Transparent Pricing, Convenience and, most importantly, Customer FIRST Service! No Accidents! What this vehicle includes: Driver Alert Package IUltrasonic Front and Rear Park AssistRear Cross Traffic AlertLane Change Alert with Side Blind Zone AlertDriver Alert Package II ($1,045 value)Adaptive Cruise ControlIntelliBeam Automatic High Beam On/offFollowing Distance IndicatorForward Collision AlertLane Keep Assist with Lane Departure WarningAutomatic Emergency BrakingFront Pedestrian BrakingPreferred Equipment Group 5SAPower Sliding Rear Window with Rear DefoggerGMC Connected Access CapablePower Front Passenger Windows with Express Up/downPower Rear Windows with Express DownDeep-Tinted GlassKeyless Open and StartPower Door LocksPower Front Windows with Driver Express Up/downRear Wheelhouse LinersColor-Keyed Carpeting Floor CoveringRemote Vehicle Starter SystemChrome Wheel to Wheel Assist StepsElectric Rear-Window DefoggerSpray-On Pickup Bed Liner with Denali LogoCompassFloor-Mounted Center ConsoleAuto-Locking Rear DifferentialSignature Denali GrilleSafety Alert SeatPremium GMC Infotainment System Radio with NavigationHill Descent ControlIntegrated Trailer Brake ControllerHeavy-Duty Air FilterWireless ChargingHeated Driver and Front Outboard Passenger Seating120-Volt Instrument Panel Power OutletAuxiliary External Transmission Oil Cooler12-Volt Rear Auxiliary Power OutletVentilated Driver and Front Passenger Seats170 Amp Alternator2 USB Ports2 USB Ports (1st Row)Electrical Lock Control Steering ColumnManual Tilt-Wheel and Telescoping Steering Column2-Speed Transfer CaseDriver Alert Package IProGrade Trailering System275/60R20SL AT BW Tires20" X 9" Multi-Dimensional Polished Aluminum WheelsOnStar and GMC Connected Services CapableLED Cargo Area LightingUniversal Home RemoteSteering Wheel Audio ControlsRear Dual USB Charging-Only PortsTheft Deterrent System (unauthorized Entry)HD Rear Vision CameraChrome Recovery Hooks4G LTE Wi-Fi Hotspot CapableAdaptive Ride Control SuspensionTrailering Package Safety and Security The vehicle constantly monitors the roadway in front of the vehicle and identifies and tracks pedestrians on an interior display. If the system determines a likely impact, it will automatically take preventative steps to avoid hitting the pedestrian.Technology and Telematics Without the need for a manufacturer specific app to be installed on the smart device, the vehicle infotainment system can access and control functions of a smart device physically plugged-into the vehicle. Android Auto/Apple CarPlay smart device wireless mirroring Apple CarPlay/Android Auto smart device wireless mirroring Mobile devices can wirelessly connect to the internet through the vehicle's private mobile network. EMISSIONS, FEDERAL REQUIREMENTS, ENGINE, 6.2L ECOTEC3 V8, TRANSMISSION, 10-SPEED AUTOMATIC, ELECTRONICALLY CONTROLLED, GVWR, 7100 LBS. (3221 KG), REAR AXLE, 3.23 RATIO, WHEELS, 20" X 9" (50.8 CM X 22.9 CM) MULTI-DIMENSIONAL POLISHED ALUMINUM, TIRES, 275/60R20SL ALL-TERRAIN, BLACKWALL, SEATS, FRONT BUCKET, JET BLACK, FORGE PERFORATED LEATHER SEAT TRIM, AUDIO SYSTEM, PREMIUM GMC INFOTAINMENT SYSTEM WITH NAVIGATION AND 8" DIAGONAL COLOR TOUCH-SCREEN, INCLUDES MULTI-TOUCH DISPLAY, AM/FM STEREO, DRIVER ALERT PACKAGE II, SUNROOF, POWER, INTELLIBEAM, AUTOMATIC HIGH BEAM ON/OFF, LICENSE PLATE KIT, FRONT, SEATS, HEATED SECOND ROW OUTBOARD SEATS, PREMIUM FLOOR LINERS WITH REMOVABLE CARPET INSERT, FRONT, PREMIUM FLOOR LINERS WITH REMOVABLE CARPET INSERT, REAR, ADAPTIVE CRUISE CONTROL, AUTOMATIC EMERGENCY BRAKING, FRONT PEDESTRIAN BRAKING, FOLLOWING DISTANCE INDICATOR, FORWARD COLLISION ALERT, LANE KEEP ASSIST, NOT EQUIPPED WITH AUTOMATIC STOP/START, SEE DEALER FOR DETAILS, NOT EQUIPPED
Dealer-provided information may change. Confirm availability, price, vehicle condition, taxes and fees with the selling dealership.
In the typical middle range · 60% of 5 similar listings ask more than this car.
How we calculate market value: comparable cars for sale now plus their last listed prices.
Price tracked by AutosXchange since Nov 6, 2026. No price change at this dealership since Nov 6 ($35,032).
AutosXchange Intel Hub: Price changes for this model in Missouri · This model in the Intel Hub · Market movers in Missouri
Dealer-advertised asking prices as observed by AutosXchange (data as of Nov 12); earlier listings at other dealerships are shown by state only. Source: AutosXchange Intel Hub, autos-xchange.com/market.
Same 2020–2021 Sierra 1500 Denali · used · any miles · within 50 miles of St Louis, Missouri. All 5 comparable cars for sale, nearest first.
$1,880 less than this car
Dave Sinclair Buick GMC · St Louis, MO · 0 mi away
$711 less than this car
Clement Supercenter · Saint Charles, MO · 18 mi away
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Clement Supercenter · Saint Charles, MO · 18 mi away
$3,381 more than this car
Newbold Toyota · O Fallon, IL · 23 mi away
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Ed Morse Chevrolet - Red Bud · Red Bud, IL · 30 mi away
2020 GMC Sierra 1500 Denali85,743 miles · Dave Sinclair Buick GMC · St Louis, MO · 0 mi away$33,152$1,880 less than this car
2020 GMC Sierra 1500 Denali80,123 miles · Clement Supercenter · Saint Charles, MO · 18 mi away$34,321$711 less than this car
2020 GMC Sierra 1500 Denali64,764 miles · Clement Supercenter · Saint Charles, MO · 18 mi away$37,321$2,289 more than this car
2021 GMC Sierra 1500 Denali53,567 miles · Newbold Toyota · O Fallon, IL · 23 mi away$38,413$3,381 more than this car
2020 GMC Sierra 1500 Denali45,096 miles · Ed Morse Chevrolet - Red Bud · Red Bud, IL · 30 mi away$39,949$4,917 more than this carAll years and trims. Nearest first.
Dave Sinclair Buick GMC · St Louis, MO · 0 mi away
Dave Sinclair Buick GMC · St Louis, MO · 0 mi away
Dave Sinclair Buick GMC · St Louis, MO · 0 mi away
Dave Sinclair Buick GMC · St Louis, MO · 0 mi away
Dave Sinclair Buick GMC · St Louis, MO · 0 mi away
Dave Sinclair Buick GMC · St Louis, MO · 0 mi away
Dave Sinclair Buick GMC · St Louis, MO · 0 mi away
Dave Sinclair Buick GMC · St Louis, MO · 0 mi away
2021 GMC Sierra 1500 SLT64,246 miles · Dave Sinclair Buick GMC · St Louis, MO · 0 mi away$34,799
2021 GMC Sierra 1500 SLT79,674 miles · Dave Sinclair Buick GMC · St Louis, MO · 0 mi away$32,031
2021 GMC Sierra 3500 HD AT4Dave Sinclair Buick GMC · St Louis, MO · 0 mi away$47,949
2022 GMC Sierra 1500 Limited Denali39,407 miles · Dave Sinclair Buick GMC · St Louis, MO · 0 mi away$39,372
2024 GMC Sierra 1500 SLE12,513 miles · Dave Sinclair Buick GMC · St Louis, MO · 0 mi away$42,503
2024 GMC Sierra 1500 Denali20,683 miles · Dave Sinclair Buick GMC · St Louis, MO · 0 mi away$54,130
2024 GMC Sierra 1500 Denali94,766 miles · Dave Sinclair Buick GMC · St Louis, MO · 0 mi away$46,001
2024 GMC Sierra 1500 AT425,838 miles · Dave Sinclair Buick GMC · St Louis, MO · 0 mi away$50,585