2025 SIERRA 1500 AT4 3.0L Duramax Diesel, Sunroof, AT4 Preferred pack, 20 inch wheels, Clean Carfax!
No matter where youre heading or what tasks need tackling, theres a premium and capable Sierra 1500 thats perfect for you. This 2025 GMC Sierra 1500 is fresh on our lot in Cobourg.

This 2025 GMC Sierra 1500 stands out in the midsize pickup truck segment, with bold proportions that create a commanding stance on and off road. Next level comfort and technology is paired with its outstanding performance and capability. Inside, the Sierra 1500 supports you through rough terrain with expertly designed seats and robust suspension. This amazing 2025 Sierra 1500 is ready for whatever. This sought after diesel 4X4 pickup has 24,235 km. It's Summit White in colour. It has an Automatic transmission and is powered by a smooth engine.


WE DELIVER ANYWHERE IN ONTARIO, ASK US FOR DETAILS, DELIVERY FEES MAY APPLY! WE OFFER FINANCING! * For more info and availability please call or EMAIL Thomas Buick GMC today! When you buy a Certified Pre-Owned Vehicle at Thomas Buick GMC in Cobourg, you'll get standard features you won't find anywhere else, like a manufacturer's backed warranty, a 150 point inspection of the vehicle, an exchange privilege and 24-hour roadside assistance. When you think about it, buying a Certified Pre-Owned Vehicle just makes sense. Prices include all fees except HST and license. PLEASE NOTE: Fee specifications and availability are subject to change without notice. Contact dealer for most current information

While we make every effort to ensure the data listed here is correct, there may be instances where some of the pricing, options or vehicle features may be listed incorrectly as we get data from multiple data sources. Please confirm the details of this vehicle with the dealer to ensure its accuracy. Dealer cannot be held liable for data that is listed incorrectly.
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Safety EquipmentAutomatic Emergency Braking (Included and only available with (PDI) GMC Pro Safety.)Front Pedestrian Braking (Included and only available with (PDI) GMC Pro Safety.)StabiliTrak, stability control system with Proactive Roll Avoidance and traction control, includes electronic trailer sway control and hill start assistDaytime Running Lamps, LED signature lightingAirbags, Dual-stage frontal airbags for driver and front outboard passenger; Seat-mounted side-impact airbags for driver and front outboard passenger; Head-curtain airbags for front and rear outboard seating positions; Includes front outboard Passenger Sensing System for frontal outboard passenger airbagOnStar Services capable (See onstar.ca for details and limitations. Services vary by model. Service plan required.)OnStar Basics (OnStar Fleet Basics for Fleet) Drive more confidently with up to 8 years of core OnStar services including mobile app commands, connectivity for select apps that provide in-vehicle voice assistance and navigation with real-time traffic, and Automatic Crash Response. (Requires (UE1) OnStar. OnStar Basics includes access to remote commands through your vehicle's mobile app (compatible smartphone required); Automatic Crash Response (not all vehicles may transmit all crash data; OnStar links to emergency services); and wireless connectivity for select apps that provide in-vehicle voice assistance and navigation with real-time traffic (Voice & Maps apps are subject to change at any time and may be provided by third parties). Term begins from date of vehicle delivery. Paid subscription required after expiry. Services are dependent on compatible wireless networks provided by third-party wireless service providers, working vehicle electrical systems, GPS signal and other factors outside GM control. Changes in technology and wireless networks may limit or prevent the operation of certain services. For customers who also separately receive or purchase a Premium Plan or Vehicle Data Plan to use Wi-Fi Hotspot and In-Vehicle Apps, the data provided as part of that plan will also be used by any Voice & Maps apps which already had data connectivity under this Basics plan; if any applicable data caps are reached, Voice & Maps apps will continue to function for the duration of this Basics plan but additional vehicle data plan(s) must be purchased to use Wi-Fi Hotspot and In-Vehicle Apps. Services, connectivity, and capabilities have additional terms and limitations and are subject to change, and will vary by model, vehicle configuration, conditions, and geographical and technical restrictions. Non-refundable and no cash value. See onstar.ca for details.)Hitch View with image adjustment, Pan/Zoom/TiltHitch GuidanceHD Surround Vision provides the driver with an overhead view of the scene around the vehicle on a centre stack display. Includes front camera washer.Trailer Camera Provisions and trailer viewing softwareFront and Rear Park Assist, ultrasonicFollowing Distance Indicator (Included and only available with (PDI) GMC Pro Safety.)Forward Collision Alert (Included and only available with (PDI) GMC Pro Safety.)Lane Keep Assist with Lane Departure Warning (Included and only available with (PDI) GMC Pro Safety.)Trailer Side Blind Zone AlertRear Cross Traffic BrakingRear Pedestrian AlertSafety Alert Seat (Included and only available with (PDI) GMC Pro Safety.)Seat Belt Adjustable Guide Loops, front row onlyRear Seat Belt IndicatorBuckle to Drive prevents vehicle from being shifted out of Park until driver seat belt is fastened; times out after 20 seconds and encourages seat belt use (Included and only available with (PDI) GMC Pro Safety.)Tire Pressure Monitoring System, auto learn includes Tire Fill Alert (does not apply to spare tire)Rear Seat ReminderInterior EquipmentSeats, front bucket with centre consoleSeat trim, Perforated leather frontSeat adjuster, driver 10-way power including lumbarSeat adjuster, passenger 10-way power including lumbarSeating, heated driver and front outboard passengerDriver memory recalls driver "presets" for power driver seat and outside mirrorsSeats, ventilated driver and front passengerSeat, Up-level Rear with Storage Package, 60/40 folding bench for Crew Cab models, includes full-length bench seat, seatback storage on left and right side, centre fold out armrest with 2 cupholders, full cab width under-seat storage, (includes child seat top tether anchor)Seats, heated second row outboard seatsCentre Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capabilityFloor covering, colour-keyed carpetingPremium Floor Liners with removable carpet insert, frontPremium Floor Liners with removable carpet insert, rearSteering column, power rake and telescopingSteering wheel, wrappedSteering wheel, heatedDriver Information Centre, enhanced, 12.3" diagonal reconfigurable multicolour digital displayGMC Premium information Display-13.4" diagonal Multicolour I touch screenIn-Vehicle Trailering App, System includes checklist, trailer maintenance reminders, trailer security alerts, trailer mileage, tow/haul reminder, trailer electrical diagnostics and Trailer Tire Pressure Monitor System moduleCompass, located in instrument clusterExterior Temperature Display, located in radio displayBrake lining wear indicatorWindows, power front, drivers express up/downWindow, power front, passenger express up/downWindows, power rear, express downDoor locks, powerKeyless Open and Start includes remote keyless entryRemote vehicle starter systemAdaptive Cruise ControlTheft-deterrent system, unauthorized entrySteering column lock, electricalWireless ChargingPower outlet, interior power outlet, 120-volt (400 watts shared with (KC9) bed mounted power outlet)Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) interior power outlet)USB Ports, 2 (first row) located on consoleUSB Ports, 2, Charge/Data ports located inside centre consoleUSB ports, (2) charge-only, rearAir conditioning, dual-zone automatic climate controlAir vents, rearDefogger, rear-window electricMirror, inside rearview auto-dimmingAssist handles front A-pillar mounted for driver and passenger, rear B-pillar mountedExterior EquipmentWheels, 20" x 9" (50.8 cm x 22.9 cm) machined aluminum with Carbon Grey Metallic accentsTires, 275/60R20SL all-terrain, blackwall (Includes (QAQ) spare tire.)Tire, spare 255/80R17SL all-season, blackwall (Included and only available with 20" or 22" wheels and tires excluding (QFV) LT265/60R20 MT blackwall Goodyear Wrangler Territory tires.)Wheel, 17" x 8" (43.2 cm x 20.3 cm) full-size, steel spareWheelhouse liners, rear (Deleted with (PCP) AT4 CarbonPro Edition.)Tire carrier lock keyed cylinder lock that utilizes same key as ignition and doorBumper, front, body-colour lowerBumper, rear body-colour with corner stepsCornerStep, rear bumperGrille (Black chrome header and grille insert bars with gloss black accents.)Headlamps, LED projectors with Fade-on/Fade-off animation, LED turn signals and Daytime Running LampsIntelliBeam, automatic high beam on/off (Included and only available with (PDI) GMC Pro Safety.)Fog lamps, LEDLighting, perimeterTaillamps, LED LED signature taillight with LED stop, turn & reverse and Fade-on/Fade-off animationMirrors, outside heated power-adjustable, power-folding and driver-side auto-dimming puddle lamps, side perimeter lighting and memoryMirror caps, high gloss BlackWipers, front rain-sensingGlass, deep-tintedLamps, cargo area, cab mounted integrated with centre high mount stop lamp, with switch in bank on left side of steering wheelLED Cargo Area Lighting located in cargo bed activated with switch on centre switch bank or key fobTailgate, GMC MultiPro Tailgate with six functional load/access featuresTailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area lightTailgate and bed rail protection caps, topDoor handles, body-colourBedliner, Spray-on Pickup bedliner with GMC logo (does not include spray-on liner on tailgate due to Black composite inner panel) (Deleted with (PCP) AT4 CarbonPro Edition.)Entertainment EquipmentAudio System, 13.4 " diagonal Premium GMC Infotainment System with Google built in apps such as navigation and voice assistance, includes colour touch-screen, multi-touch display, AM/FM stereo Bluetooth streaming audio for music and most phones; featuring wireless Android Auto and Apple CarPlay capability for compatible phonesSiriusXMSiriusXM with 360L Trial Subscription. SiriusXM with 360L transforms your customers' ride with our most extensive and personalized radio experience on the road. (Certain features and/or content may not be available unless an active data connection is enabled in the vehicle. Content varies by SiriusXM subscription plan. Features and display may vary by vehicle. All SiriusXM services require a subscription, sold separately by SiriusXM after the trial period. Your SiriusXM service will automatically stop at the end of your trial unless you decide to subscribe. If you decide to continue service after your trial, the subscription plan you choose will continue for an indeterminate term and you will be charged according to your chosen payment method at the then-current rates unless and until you cancel. Taxes apply. Please see the SiriusXM Customer Agreement at siriusxm.ca/terms for complete terms and how to cancel, which includes calling SiriusXM at 1-888-539-7474. All rates, content, and programming are subject to change. SiriusXM uses personal information in accordance with SiriusXM Privacy Policy, available at siriusxm.ca/privacy. SiriusXM Canada Inc. "SiriusXM", the SiriusXM logo, channel names and logos are trademarks of Sirius XM Radio Inc. and are used under license.)Bose Sound System, premium 7-speaker system with Richbass wooferBluetooth for phone connectivity to vehicle infotainment systemWireless, Apple CarPlay / Wireless Android AutoSteering wheel audio controlsWi-Fi Hotspot capable (Terms and limitations apply. See onstar.ca or dealer for details.)Mechanical EquipmentEngine, Duramax 3.0L Turbo-Diesel I6 (305 hp [227 kW] @ 3750 rpm, 495 lb-ft of torque [671 Nm] @ 2750 rpm) (Includes (KW5) 220-amp alternator and (K05) engine block heater.)Transmission, 10-speed automatic with Electronic Precision shift, electronically controlled with overdrive, tow/haul mode and steering column paddle shifters. Includes Cruise Grade Braking and Powertrain Grade BrakingRear axle, 3.23 ratioPickup bedGVWR, 7200 lbs. (3266 kg) (Requires TK10*43 Crew Cab 4WD model with (LZ0) Duramax 3.0L Turbo-Diesel I6 engine.)Push Button StartAir filter, heavy-dutyElectronic Precision Shift and steering column paddle shiftersAutomatic Stop/StartHill Descent ControlAuto-locking rear differentialTransfer case, two-speed, electronic Autotrac with push button control (4WD models only)Suspension, Off-Road with 2" factory installed lift and monotube shocksFour wheel driveAlternator, 220 ampsBattery, heavy-duty 850 cold-cranking amps/95 Amp-hr, maintenance-free with rundown protection and retained accessory power (Included and only available with (LZ0) Duramax 3.0L Turbo-Diesel I6 engine.)Frame, fully-boxed, hydroformed front sectionTrailer brake controller, integratedRecovery hooks, RedSkid PlatesCargo tie downs (12), fixed, rated at 500 lbs per cornerSteering, Electric Power Steering (EPS) assist, rack-and-pinionBrakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotorsCapless Fuel FillExhaust, dual system (Includes chrome exhaust tips. Not available with (L87) 6.2L EcoTec3 V8 engine.)Exhaust, aluminized stainless-steel muffler and tailpipeOther EquipmentTrailering Package includes trailer hitch, 7-pin and 4-pin connectors and (CTT) Hitch GuidanceGMC Pro Safety includes (UEU) Forward Collision Alert, (UE4) Following Distance Indicator, (UKJ) Front Pedestrian Braking, (TQ5) IntelliBeam, (UHX) Lane Keep Assist with Lane Departure Warning, and (UHY) Automatic Emergency Braking (Includes (T8Z) Buckle to Drive and (HS1) Safety Alert Seat.)