New 2026 GMCSierra 1500 SLE
- Diesel
- Exterior Color
- Summit White
- Interior Color
- Jet Black
- Body/Seating
- Truck Crew Cab/6 seats
- Seats
- 6 seats
- Fuel Economy
- 22/26 MPG City/Hwy
- Transmission
- Automatic
- Drivetrain
- 4x4
- Engine
- I-6 cyl
- VIN
- 3GTUUBE89TG296443
- Stock Number
- B47706
Highlighted Features
- Navigation system
- Lane departure
- Automatic temperature control
- Emergency communication system
- Wireless phone connectivity
- Exterior parking camera rear
- Front dual zone A/C
- Auto high-beam headlights
- Split folding rear seat
- Heated front seats
- Perimeter/approach lights
- Remote keyless entry
Included Packages & Accessories
- Federal Emissions Requirements
- Engine: Duramax 3.0L Turbo-Diesel I6
- 220 Amp Alternator
- Engine Block Heater
- 850 Heavy-Duty Battery
- GVWR: 7,200 lbs
- 3.23 Rear Axle Ratio
- Transmission: 10-Speed Automatic
- Wheels: 20" Polished Aluminum
- High Capacity Suspension Package
- Preferred Package
- Universal Home Remote
- Power Sliding Rear Window with Rear Defogger
- Hitch View
- in-Vehicle Trailering System App
- Adaptive Cruise Control
- Rear Wheelhouse Liners
- GMC MultiPro Tailgate
- Remote Start Package
- Remote Vehicle Starter System
- Theft Deterrent System
- Electric Rear-Window Defogger
- Front 40/20/40 Split-Bench Seat
- 10-Way Power Driver Seat Adjuster with Lumbar
- 4-Way Manual Passenger Seat Adjuster
- Heated Driver and Front Outboard Passenger Seating
- Radio: Premium GMC Infotainment Audio System
- 6-Speaker Audio System Feature
- Wireless Apple CarPlay/Wireless Android Auto
- Tires: 275/60R20 AS BW
- 255/80R17SL AS BW Spare Tire
- Preferred Equipment Group 3SA
- GMC Pro Safety
- Forward Collision Alert
- Following Distance Indicator
- Front Pedestrian Braking
- IntelliBeam Automatic High Beam on/Off
- Lane Keep Assist with Lane Departure Warning
- Automatic Emergency Braking
- Buckle to Drive
- SLE Convenience Package
- Dual-Zone Automatic Climate Control
- LED Cargo Area Lighting
- SLE Value Package
- Auto-Locking Rear Differential
- Trailering Package
- SiriusXM with 360L Trial Subscription
- Power Door Locks
- Push Button Start
- Keyless Open and Start
- Color-Keyed Carpeting Floor Covering
- Front Rubberized-Vinyl Floor Mats
- Rear Rubberized-Vinyl Floor Mats
- OnStar Services Capable
- Wi-Fi Hotspot Capable
- 120-Volt Interior Power Outlet
- 120-Volt Bed Mounted Power Outlet
- 2 Type-C Charge-Only Rear USB Ports
- 2 Charge/Data USB Ports
- HD Rear Vision Camera
- Deep-Tinted Glass
- Chrome Header with Medium Silver Grille Insert Bars
- Steering Wheel Audio Controls
- Manual Tilt-Wheel and Telescoping Steering Column
- Power Front Windows with Driver Express Up/Down
- Power Front Windows with Passenger Express Down
- Power Rear Windows with Express Down
- Front Frame-Mounted Black Recovery Hooks
- Wheels: 17" x 8" Bright Silver Painted Aluminum
- Engine: TurboMax
- Transmission: 8-Speed Automatic
- Integrated Trailer Brake Controller
- Single Speed Transfer Case
- Front License Plate Kit
Detailed Specifications
- 1-touch down
- 1-touch up
- Adaptive Cruise Control: Adaptive Cruise Control
- Air conditioning
- Automatic temperature control
- Driver door bin
- Driver vanity mirror
- Emergency communication system: OnStar
- Front beverage holders
- Front dual zone A/C
- Garage door transmitter
- Heated steering wheel
- Illuminated entry
- Navigation system
- Overhead console
- Passenger door bin
- Passenger vanity mirror
- Power windows
- Proximity key: doors and push button start
- Rear door bins
- Remote engine start
- Remote keyless entry
- Speed control
- Telescoping steering wheel
- Tilt steering wheel
- Alloy wheels
- Front anti-roll bar
- Front tires: 275/60SR20.0
- Front wheel independent suspension
- Power steering
- Rear tires: 275/60SR20.0
- Speed-sensing steering
- Wheel size: 20"
- 1st row LCD monitors: 2
- AM/FM radio: SiriusXM with 360L
- Primary LCD size: 13.4"
- Radio data system
- Satellite radio trial duration with new vehicle purchase (months): 3
- Smart device integration: Apple CarPlay/Android Auto
- Speakers: 6
- Steering wheel mounted audio controls
- Turn-by-turn navigation directions: OnStar Turn-by-Turn Navigation
- Wireless phone connectivity: Bluetooth
- Basic warranty: 36 months/36,000miles
- Corrosion perforation warranty: 72 months/100,000miles
- Diesel engine warranty: 60 months/100,000miles
- Maintenance warranty: 12 months/ unlimited distance
- Powertrain warranty: 60 months/60,000miles
- Roadside assistance coverage: 60 months/60,000miles
- Front center armrest: w/storage
- Front seats: bench
- Heated front seats
- Max seating capacity: 6
- Power 2-way driver lumbar support
- Power driver seat
- Rear seats: split-bench
- Rear seats Folding position: fold-up cushion
- Seat Upholstery: cloth
- Split folding rear seat
- Block heater
- Compressor: intercooled turbo
- Cylinder configuration: I-6
- Cylinder deactivation
- Drive type: four-wheel
- Engine liters: 3.0L
- Engine location: front
- Fuel economy city: 22mpg
- Fuel economy combined: 18mpg
- Fuel economy highway: 26mpg
- Fuel tank capacity: 24.0gal.
- Horsepower: 305hp @ 3,750RPM
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Number of valves: 24
- Rear locking differential
- Recommended fuel: Diesel
- Standard fuel economy fuel type: diesel
- Torque: 495 lb.-ft. @ 2,750RPM
- Transmission: 10 speed automatic
- Variable intake manifold
- Variable valve control
- Approach angle: 19 deg
- Departure angle: 24 deg
- Ground clearance (min): 206mm (8.1")
- Ramp breakover angle: 18 deg
- Bumpers: chrome
- Door mirrors: chrome
- Heated door mirrors
- Hitch Class: IV
- Left rear passenger door: conventional
- Power door mirrors
- Rear cargo: tailgate
- Rear step bumper
- Right rear passenger: conventional
- Trailer hitch
- Trailer sway control
- Compression ratio: 15.00 to 1
- Curb weight: 2,440kg (5,380lbs)
- Engine bore x stroke: 84.0mm x 90.0mm (3.31" x 3.54")
- Engine displacement: 3.0 L
- Engine torque: 495 lb.-ft. @ 2,750RPM
- Exterior body width: 2,063mm (81.2")
- Exterior height: 1,918mm (75.5")
- Exterior length: 5,890mm (231.9")
- Front headroom: 1,092mm (43.0")
- Front hiproom: 1,554mm (61.2")
- Front legroom: 1,131mm (44.5")
- Front shoulder room: 1,676mm (66.0")
- GVWR: 3,266kg (7,200lbs)
- Greenhouse Gas Score (GG): 3
- Payload: 812kg (1,790lbs)
- Rear headroom: 1,019mm (40.1")
- Rear hiproom: 1,529mm (60.2")
- Rear legroom: 1,102mm (43.4")
- Rear shoulder room: 1,656mm (65.2")
- Towing capacity: 3,946kg (8,700lbs)
- Turning radius: 7.1m (23.5')
- Wheelbase: 3,744mm (147.4")
- Appearance: analog
- Auto high-beam headlights
- Compass
- Configurable
- Delay-off headlights
- Exterior parking camera rear: HD Rear Vision Camera w/Hitch View yes
- Front reading lights
- Fully automatic headlights
- Lane departure: Lane Keep Assist with Lane Departure Warning active
- 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
- Forward collision: Forward Collision Alert with Automatic Braking mitigation
- Front pedestrian detection: prevention
- Ignition disable
- Occupant sensing airbag
- Overhead airbag
- Panic alarm
- Perimeter/approach lights
- Security system
- Tracker system: Stolen Vehicle Assistance
- Traction control
KBB.com Consumer Reviews
- 4.0
Depreciation of 50%
By Manny A on 10/28/2026 10:06:36 AM
This is a amazing truck.. Comfortable lots of sensors Etc…. My truck has 30000 miles I when to trade in they offer $46000 I paid $86000 the depreciation is incredible I don’t buy new truck never again. - 5.0
2021 GMC SLT 4WD SIERRA, Great Truck
By Ransom1 on 10/15/2026 4:18:42 PM
This is my 8th truck. This is hands down the very best truck I’ve ever owned. Not only is it the best looking truck on the road I have never had it in the shop except for oil changes and scheduled maintenance. The silver does not show dirt or grime. - 5.0
Great 4 cylinder truck
By Steve on 9/23/2026 2:01:15 AM
I have only pulled a trailer one time and still got 18 mpg down doing 80 down the interstate. Otherwise this vehicle is used for commuting or recreating. I typically get 22-24 mpg driving MT highways to the mountains. The turbo has some spunk for getting up to speed and the five years I've had my truck no complaints.