GMC Sierra 1500 AT4 Crew Cab 4x4 | 3.0L Duramax Diesel | 4in lift kit | Tech Group2025 GMC Sierra 1500 AT4 Crew Cab 4x4 Duramax Diesel used for sale at Sainte-Marie and Saint-Malachie, near Québec City | 3.0L Duramax Turbo Diesel | Technology Group | 18,229 km
Specifications - GMC Sierra 1500 AT4 2025
Year · 2025
Make · GMC
Model · Sierra 1500 AT4
Trim · Crew Cab 4x4 standard box
Body style · Full-size pickup
Exterior colour · Storm Grey Metallic (Gris Orage Métallisé)
Interior colour · Jet Black / Kalahari
Passengers · 5
Doors · 4
Mileage · 18,229 km
Stock # · 24207C
VIN · 3GTUUEE89SG157171
Drivetrain · 4WD with Autotrac 2-speed transfer case
Transmission · 10-speed automatic
Fuel · Diesel
GVWR · 7,200 lb (3,266 kg)
Towing capacity · Up to 9,000 lb (4,082 kg) per configuration
Engine · 3.0L Duramax I-6 Turbo Diesel
Cylinders · Inline 6
Price · 65,990
Key features - GMC Sierra 1500 AT4 Duramax 2025
Powertrain and performance
The 3.0L Duramax I-6 Turbo Diesel delivers 305 hp and 495 lb-ft of torque, paired with the 10-speed Hydra-Matic automatic. Autotrac 2-speed transfer case, AT4 X31 off-road suspension with monotube shocks, 2-inch front lift + 4po additionnal modifs, electronic locking rear differential, skid plates, hill descent control, integrated trailer brake controller and ProGrade Trailering app. The Duramax + AT4 combination is one of the rarest and most capable on the pre-owned market.
AT4 cabin
5-passenger Crew Cab with Jet Black / Kalahari leather seating, heated and ventilated front seats, heated 2nd-row outboard seats, heated leather-wrapped steering wheel, driver and mirror memory, 10-way power seats, tilt-and-telescoping power steering column, premium floor coverings, wireless phone charging and 120V bed power outlet.
GMC Premium technology and infotainment
13.4-inch landscape touchscreen (largest in class), Apple CarPlay and Android Auto, premium Bose audio, ProGrade Trailering app, OnStar One Standard (8-month included trial), SiriusXM included trial, wireless phone charging. Factory-installed Technology Group: 15-inch colour heads-up display, integrated rear-view-mirror camera (Mirror Cam) and bed-view camera.
Safety and reliability - GMC Pro Safety
Front and rear parking radars, trailer side-blind detection, rear cross-traffic braking, rear pedestrian detection alert, safety alert seat (vibration), HD Surround Vision (360°), tire pressure monitoring with fill alert, automatic emergency braking, forward collision alert, front pedestrian detection braking, lane keep assist with lane departure warning, following distance indicator, IntelliBeam automatic high beams, rear-window defogger, rain-sensing wipers.
Description - GMC Sierra 1500 AT4 Duramax 2025
Introduction
This is a 2025 GMC Sierra 1500 AT4 Crew Cab 4x4 pre-owned in Storm Grey Metallic, powered by the 3.0L Duramax I-6 Turbo Diesel and the 10-speed automatic transmission. At only 18,229 km, it is essentially a new truck - without the initial depreciation and with almost all the original warranty intact. AT4 is the Sierra 1500's sport off-road trim, and the Duramax + AT4 combination adds diesel torque and efficiency to X31 off-road equipment. A rare and sought-after combination on the pre-owned market in Beauce and Chaudière-Appalaches.
The 3.0L Duramax I-6 Turbo Diesel
The Duramax 3.0L is one of the most appreciated engines in the full-size truck class: massive 495 lb-ft of torque available from 1,500 rpm, significantly more efficient than a gasoline V8 on the highway, and proven reliability. Paired with the 10-speed Hydra-Matic transmission, it delivers smooth acceleration and remarkable fuel efficiency for a 1500 4x4. At only 18,229 km, this Duramax is in the prime of its life.
Towing capacity and off-road capability
Towing capacity: up to 9,000 lb (4,082 kg) per configuration. Factory-installed integrated trailer brake controller, ProGrade Trailering app to adjust settings directly on the screen. Off-road side: AT4 X31 monotube-shock suspension, 2-inch front lift, skid plates, hill descent control, electronic locking rear differential, all-terrain tires and Autotrac 2-speed transfer case (4-Hi / 4-Lo).
AT4 styling and road presence
Storm Grey Metallic paint, AT4 matte black grille with vertical black bars, front AT4 plate, side steps, all-terrain tires, 20-inch machined-face aluminum wheels with Carbon Grey Metallic detail, LED fog lights, LED headlamps and taillamps, MultiPro tailgate with LED lighting (GMC's signature multi-function tailgate), spray-in bedliner, LED bed lighting. A commanding, modern presence.
Premium AT4 cabin
5-passenger Crew Cab, Jet Black / Kalahari leather upholstery, heated and ventilated front bucket seats, heated 2nd-row outboard seats, 10-way power seats with driver memory, tilt-telescoping power steering column with memory, heated leather-wrapped steering wheel, premium floor coverings, wireless phone charging, 120V rear bed outlet, tri-zone climate control, remote start.
Technology and connectivity
GMC Premium Infotainment with 13.4-inch landscape touchscreen, Apple CarPlay and Android Auto, built-in navigation, ProGrade Trailering app, premium 7-speaker Bose audio, OnStar One Standard (8-month included trial), SiriusXM with included trial, built-in 4G LTE Wi-Fi hotspot, wireless charging. Factory-added Technology Group: 15-inch colour heads-up display, integrated rear-view-mirror camera (Mirror Cam), bed-view camera.
Safety and GMC Pro Safety driver aids
Adaptive cruise control, automatic emergency braking, forward collision alert, front and rear pedestrian detection braking, rear cross-traffic alert with active braking, lane keep assist with lane departure warning, following distance indicator, HD Surround Vision (360°), front and rear parking radars, trailer side-blind detection, safety alert seat, tire pressure monitoring with fill alert.
Standout features of this unit
3.0L Duramax I-6 Turbo Diesel engine
10-speed Hydra-Matic automatic transmission
AT4 trim (Sport Performance off-road)
X31 off-road suspension with monotube shocks
Autotrac 2-speed transfer case (4-Hi / 4-Lo)
Electronic locking rear differential
Skid plates + hill descent control
Technology Group: Mirror Cam + 15" HUD + Bed View Camera
13.4-inch GMC Premium Infotainment touchscreen
Premium Bose audio
Jet Black / Kalahari leather heated/ventilated front + heated 2nd-row outboard
GMC's signature MultiPro tailgate with LED
Spray-in bedliner + LED bed lighting
20" Carbon Grey machined-face wheels
Extendable heated electric trailer mirrors
Vehicle status and remaining warranty
Very low mileage (18,229 km) for a 2025 truck. The GMC basic warranty (3 years / 60,000 km) remains active. The GMC powertrain warranty (5 years / 100,000 km) remains largely active. The anti-corrosion warranty (6 years / 160,000 km) remains active. GMC warranties are transferable to the next owner for Canadian residents (exact details to be confirmed with our service department at the time of sale). The Duramax diesel benefits from the same general powertrain coverage (no separate diesel warranty at GMC).
Why buy at Daniel Paré Dodge Chrysler
Daniel Paré Dodge Chrysler is a long-established RAM dealer in the Beauce and Chaudière-Appalaches region, with two service locations: Sainte-Marie and Saint-Malachie. Our team also supports pre-owned truck buyers across all makes. Used-vehicle financing, 10-second trade-in valuation, multi-point inspection and certified service - all under one roof, near Québec City.
Seven reasons to choose this 2025 GMC Sierra 1500 AT4 Duramax used
Rare AT4 (off-road sport) + 3.0L Duramax diesel combination
Very low mileage (18,229 km) for a 2025 truck
All original GMC warranties still active
Complete Technology Group (15" HUD, Mirror Cam, Bed Camera)
X31 off-road suspension + electronic locking differential
Bose audio, heated/ventilated Kalahari leather seats, 13.4" screen
Available at Daniel Paré Dodge Chrysler in Sainte-Marie and Saint-Malachie, near Québec City
Frequently asked questions
What is the AT4 trim on a GMC Sierra?
AT4 is the Sierra's sport off-road trim (equivalent to Tundra TRD Off-Road or Ram Rebel). It adds: X31 suspension with 2-inch lift and monotube shocks, skid plates, electronic locking rear differential, all-terrain tires, Autotrac 2-speed transfer case, matte black grille and front AT4 plate. It is the balance between road comfort and off-road capability.
What is the advantage of the 3.0L Duramax Diesel on a Sierra 1500?
The 3.0L Duramax I-6 delivers 305 hp and 495 lb-ft of torque available from 1,500 rpm - more torque than a gasoline 5.3L V8 with significantly better highway fuel economy (up to 30% less). It is the ideal choice for buyers who drive long distances or tow regularly.
What is the towing capacity of this unit?
Up to 9,000 lb (4,082 kg) per configuration. The factory-installed integrated trailer brake controller, the ProGrade Trailering app and the extendable trailer mirrors make regular towing significantly easier.
What warranty is left on this unit?
All original GMC warranties remain active (basic 3 years / 60,000 km, powertrain 5 years / 100,000 km, anti-corrosion 6 years / 160,000 km). At 18,229 km, the residual coverage is exceptional. Exact dates will be confirmed by our service department at the time of sale.
How does this Sierra AT4 Diesel handle Quebec winters?
Excellent. The 4WD Autotrac 2-speed transfer case, the raised X31 suspension, the all-terrain tires, the factory engine block heater, the remote start and hill descent control make it perfectly suited to Quebec winters - forest roads, job sites, or simply secondary roads in Beauce.
Is financing available on a pre-owned Sierra 1500 AT4 Diesel?
Yes. Daniel Paré Dodge Chrysler offers financing solutions tailored to upper-trim pre-owned pickups, all makes. Our team can estimate your monthly payment and trade-in value in 10 seconds with no obligation.
Why buy at Daniel Paré Dodge Chrysler rather than from a private seller?
Because a Sierra 1500 AT4 Duramax is a premium vehicle that deserves a thorough mechanical check. Buying at Daniel Paré Dodge Chrysler in Sainte-Marie or Saint-Malachie gives you access to a complete multi-point inspection, history verification, certified service and full transparency on vehicle condition. On a 2025 truck with only 18,229 km, that means a worry-free purchase.
Daniel Paré Dodge Chrysler
This 2025 GMC Sierra 1500 AT4 Crew Cab 4x4 Duramax pre-owned pickup is available at Daniel Paré Dodge Chrysler, in Sainte-Marie and Saint-Malachie, near Québec City. Our team helps you choose a pre-owned pickup that fits your lifestyle and your workload. Book a test drive, request a trade-in evaluation or explore our used-vehicle financing options.
Warranty - Additional informationOriginal GMC manufacturer warranties (to be confirmed with the Daniel Paré Dodge Chrysler service department): the GMC basic warranty (3 years / 60,000 km) remains active. The GMC powertrain warranty (5 years / 100,000 km) remains largely active (about 81,771 km of remaining coverage at the time of listing). The GMC anti-corrosion (perforation) warranty (6 years / 160,000 km) remains active. The 3.0L Duramax diesel engine is covered by the general powertrain warranty (no separate diesel coverage at GMC). GMC warranties are transferable to the next owner for Canadian residents.
This unit is not covered by an additional extended warranty contract.
All dates and mileage limits are to be confirmed with our service department at the time of sale.
Good Working Order WarrantyAccording to Articles 159 and 160 of the Consumer protection act (1978, c9) this vehicle is classified as follows and carries a warranty of working condition for the term or mileage indicated below, whichever comes first.: A - 6 months or 10,000 km
