Vehicle highlights
- 4WD
- Apple CarPlay
- Android Auto
- Blind Spot Warning
- Leather Seating
- Cruise Control
Price and listing details
Price breakdown
- MSRP
- $68,860
- List price
- $63,338
- Fees, rebates & discounts
- -$7,837
- Advertised price
- $55,501
This is the net difference between the list and advertised prices. It may include fees, rebates, discounts, or other dealer adjustments. Confirm details and eligibility with the dealer.
Mandatory dealer charges are included in this advertised price. The dealer did not provide Car Handshake with an itemized fee breakdown. View the dealer’s listing or contact the dealer for details. Taxes, title, registration, and other government charges are additional.
- Stock number
- 126196
- VIN
- 3GTUUDE88TG438597
- Seen in inventory
- Listing updated
Confirm availability and transaction details with the dealership.
Specifications
Overview
- Year
- 2026
- Make
- GMC
- Model
- Sierra 1500
- Trim
- SLT
- Condition
- New
- Body
- Pickup
- Mileage
- 4 mi
Engine & drivetrain
- Fuel
- Diesel
- Driveline
- 4WD
- Transmission
- Automatic
- MPG
- City 22 / Hwy 26
- Displacement
- 3000 cc
- Engine
- 3.0L I6
Exterior & interior
- Exterior color
- Black
- Interior color
- Black
Seating and powertrain
- Seats
- Not confirmed
- Third row
- Not confirmed
- Powertrain
- Diesel
Seat count does not confirm a third row. Check unconfirmed details with the dealership.
Features
38 listedSafety
10
- Blind Spot Warning
- Forward Automatic Emergency Braking
- Rear Cross Traffic Warning
- Lane Keep Assist
- Lane Departure Warning
- Surround View Camera
Show all 10 featuresShow fewer features
- Forward Collision Warning
- Pedestrian Automatic Emergency Braking
- Cruise Control
- Rear Seat Reminder
Comfort & interior
9
- Heated Front Seats
- Remote Start
- Leather Seating
- Ventilated Front Seats
- Heated Steering Wheel
- Push Button Start
Show all 9 featuresShow fewer features
- Power Driver Seat
- Keyless Entry
- Split-Folding Rear Seats
Technology
9
- Apple CarPlay
- Android Auto
- Built-in Navigation
- Wireless Phone Charging
- Bluetooth
- Satellite Radio
Show all 9 featuresShow fewer features
- Touchscreen Display
- Voice Control
- Digital Instrument Cluster
Exterior & utility
9
- Trailer Hitch
- Trailer Brake Controller
- Fog Lights
- Rain-Sensing Wipers
- Heated Mirrors
- Tinted Windows
Show all 9 featuresShow fewer features
- Trailer Sway Control
- Skid Plates
- Running Boards
Performance
1
- Engine Stop-Start
Dealer notes
Onyx Black outside, Jet Black perforated leather inside — the new 2026 GMC Sierra 1500 SLT Crew Cab at Napleton Buick GMC in Crystal Lake carries delivery miles only and arrives wearing more than a dozen factory packages that balance genuine off-road hardware with the kind of daily comfort an SLT driver expects. The Duramax 3.0L turbo-diesel inline-six and 10-speed automatic with Electronic Precision Shift put efficiency and low-end pull in the same powertrain.
At a glance: Duramax 3.0L turbo-diesel I6 · 10-speed automatic with Electronic Precision Shift · 4WD · Crew Cab / short bed · delivery miles only · Onyx Black / Jet Black perforated leather
Read moreShow less
The X31 Off-Road Package and X31 Off-Road and Protection Package together give this truck 20-inch polished aluminum wheels wrapped in 275/60R20 all-terrain tires, an off-road suspension tune, skid plates, a two-speed transfer case with Electronic Autotrac, hill descent control, a heavy-duty air filter, dual exhaust, and a spray-on bedliner with GMC logo — plus all-weather floor liners for the cabin.
Chrome wheel-to-wheel assist steps and front molded splash guards round out the exterior. The ProGrade Trailering System adds Hitch View and the in-vehicle trailering app, and the Preferred Equipment Group contributes an integrated trailer brake controller, an auxiliary external transmission oil cooler, an auto-locking rear differential, and a 220-amp alternator to back it all up.
The SLT Convenience Package upgrades the cabin with ventilated front seats, a floor-mounted center console, wireless charging, and the premium Bose 7-speaker sound system. The SLT Preferred Package adds a heated second-row outboard seats, a power sliding rear window with defogger, adaptive cruise control, and a universal home remote.
The 13.4-inch GMC infotainment display runs Google built-in apps including navigation and voice assistance, pairs wirelessly with Apple CarPlay and Android Auto, and connects through a Wi-Fi hotspot. Front-row seats are heated and ventilated; rear outboard seats are heated.
A remote vehicle starter, keyless open and start, push button start, and a power rake-and-telescoping steering column handle the everyday details.
The Sierra Safety Plus Package loads in HD Surround Vision, ultrasonic front and rear park assist, trailer side blind zone alert, rear cross traffic braking, rear pedestrian detection, trailer camera provisions, and a safety alert seat. GMC Pro Safety covers forward collision mitigation and additional active-safety basics, keeping the full picture in view whether the bed is empty or the trailer is on.
Napleton Buick GMC is at 6305 Northwest Hwy on US-14 in Crystal Lake, near the Metra UP-NW line and convenient to Lake in the Hills, McHenry, Woodstock, and Huntley. Napleton is a family-owned group with more than 80 years in the automotive business — no-pressure is the standard here, not the exception.
If the diesel half-ton with off-road hardware and a leather cabin is what you have been looking for, this one is on the lot and ready to look at.
Dealership location
Napleton Buick GMC Crystal Lake
Dealer: Napleton Autos
6305 Northwest Highway, Crystal Lake, IL, 60014
