2025 GMC Sierra 1500 SLT
- Used
The overview
- Exterior Color
- Summit White
- Interior Color
- Dark Walnut/Slate
- Odometer
- 16,280 miles
- Fuel Economy
- 15/19 MPG City/Hwy
- Transmission
- 10-Speed Automatic
- Drivetrain
- 4x4
- Engine
- V-8 cyl
- VIN
- 3GTUUDED2SG332755
- Stock Number
- G6640A
The highlights
- Navigation system
- Lane departure
- Leather upholstery
- Automatic temperature control
- Emergency communication system
- Wireless phone connectivity
- Front dual zone A/C
- Auto high-beam headlights
- Rain sensing wipers
- Auto-dimming rearview mirror
- Split folding rear seat
- Memory seat
The full specifications
- 1-touch down
- 1-touch up
- Air conditioning
- Auto-dimming rearview mirror
- Automatic temperature control
- Driver door bin
- Driver vanity mirror
- Emergency communication system: OnStar
- Front beverage holders
- Front dual zone A/C
- Heated steering wheel
- Illuminated entry
- Memory seat
- Navigation system
- 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
- 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: 13.4"
- Radio data system
- Smart device integration: Apple CarPlay/Android Auto
- Steering wheel mounted audio controls
- Turn-by-turn navigation directions: OnStar Turn-by-Turn Navigation
- 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
- Cylinder deactivation
- Drive type: four-wheel
- Electric motor 1 torque: none
- Electric motor horsepower: none
- Engine location: front
- Fuel economy city: 15mpg
- Fuel economy combined: 17mpg
- Fuel economy highway: 19mpg
- Fuel tank capacity: 24.0gal.
- Hybrid electric powertrain type: none
- Hybrid system combined power torque: none
- Hybrid system net power: none
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Rear locking differential
- Transmission: 10 speed automatic
- Variable valve control
- Approach angle: 19 deg
- Departure angle: 24 deg
- Ground clearance (min): 206mm (8.1")
- Ramp breakover angle: 18 deg
- Auto-dimming door mirrors
- 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
- 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")
- Greenhouse Gas Score (GG): 3
- 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")
- Wheelbase: 3,744mm (147.4")
- Appearance: analog
- Auto high-beam headlights
- Compass
- Configurable
- Delay-off headlights
- Front fog lights
- 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
- Rain sensing wipers
- 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
- Traction control
Notes from the dealer
- CLEAN CARFAX
- NO ACCIDENTS
- ONE OWNER
- STILL UNDER FACTORY WARRANTY
- SLT Premium Plus Package
- X31 Off-Road & Protection Package
- Heated front seats and ventilated driver & passenger seating
- Apple CarPlay/Android Auto with wireless connectivity
- Premium Bose audio system with SiriusXM
- Adaptive Cruise Control and lane keep assist
- HD surround vision camera system
- Spray-on bedliner with GMC logo
The Sierra 1500 SLT delivers premium comfort wrapped in truck toughness. The Dark Walnut and Slate leather interior, paired with heated and ventilated seating, creates an inviting cabin, while the X31 package adds genuine off-road capability with hill descent control and suspension enhancements. Visit our showroom to experience this exceptional truck firsthand and discover why this SLT is the smart choice for your next adventure.
Please note: This vehicle description was generated with the assistance of AI. While we strive for accuracy, occasional discrepancies may occur. Please confirm all vehicle features and details with our team.
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.
Although every reasonable effort has been made to ensure the accuracy of the information contained on this site, absolute accuracy cannot be guaranteed. This site, and all information and materials appearing on it, are presented to the user "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability, fitness for a particular purpose, title or non-infringement. All vehicles are subject to prior sale. Price applies to in-stock units only and excludes applicable tax, title, and other governmental fees and customer-selected options. Prices include a dealer fee of $799. In order to receive the price, you must bring in this advertisement and have the price referenced in your contract at the time of purchase or lease. Not responsible for typographical errors.
All vehicle specifications, prices and equipment are subject to change without notice. See above for information on purchase financing and lease program expiration dates. Prices and payments (including the amount down payment) do not include tax, titles, tags, emissions testing charges, or other fees required by law or lending organizations. Prices do include a dealer fee of $799. The estimated payments may not include upfront finance charges that must be paid to be eligible for the purchase financing program used to estimate the APR and payments. Listed Annual Percentage Rates are provided for the selected purchase financing or lease programs available on the current date. Program expiration dates reflect currently announced program end dates, but these programs are subject to change at any time.
Lessees will be financially responsible for mileage beyond the elected quantity and for vehicle maintenance and repairs and excessive vehicle wear. Option to purchase at lease end for an amount may be determined at lease signing. Payments may be higher in some states. You may not be able to combine other incentives with the purchase financing or leasing programs presented above. Residency restrictions may apply. See dealer for details.
Listed APR, down payment, payments, incentives and other terms are estimates for example purposes only. Information provided is based on very well-qualified buyers or lessees. The payment information provided here is not a commitment by any organization to provide credit, leases or other programs. Some customers may not qualify for listed programs. Your terms may vary. Lessor must approve lease. Credit approval required.





