Sierra 3500

Spider

8-Cylinder Turbo

Power, Precision, and Off-Road Confidence This 2025 GMC Sierra 3500 SLT is built to handle the toughest jobs with style and strength. Under the hood, the legendary Duramax diesel engine delivers uncompromising torque and towing capability, paired with the proven Allison transmission for smooth, confident performance in any condition. Outfitted with the X31 Off-Road Package, this truck is ready to leave the pavement behind. With off-road suspension tuning, skid plates, hill descent control, and a heavy-duty air filter, it's designed to take on rough terrain without hesitation - whether you're on the ranch, the job site, or deep in the backcountry. The SLT trim brings a refined touch to this workhorse, with premium materials, advanced tech, and a quiet, comfortable cabin that makes long hauls and tough days easier. From hauling heavy loads to weekend adventures, this Sierra 3500 is built to do it all and look good doing it. If you're looking for a truck that works as hard as you do and never backs down, this GMC Sierra 3500 SLT with the X31 package is ready to roll. Call us today 360-799-8007 speedwaychevrolet.com +++++++++++ +++++++++++++++++++++++++++++++++++ 10-Speed Automatic, 4WD, Jet Black w/Perf Leather-Appointed Front Outboard Seat Trim, 120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 2 Charge-Only Rear USB Ports, 2 Charge/Data USB Ports, 2-Speed Active Transfer Case, 6-Speaker Audio System Feature, Chrome Surround Grille w/Chrome Insert Bars, Deep-Tinted Glass, Electric Rear-Window Defogger, Front Rain-Sensing Wipers, Heated Driver &amp; Front Outboard Passenger Seats, Hill Descent Control, Keyless Open &amp; Start, LED Cargo Area Lighting, Manual Tilt-Wheel/Telescoping Steering Column, Off-Road Suspension, Power Front Windows w/Passenger Express Up/Down, Preferred Equipment Group 4SA, Push Button Start, Remote Vehicle Starter System, SiriusXM w/360L Trial Subscription, Steering Wheel Audio Controls, Unauthorized Entry Theft-Deterrent System, Wireless Phone Projection, X31 Off-Road Package. ++++++++++++++++++++++++ ++++++++++++++++++++++ Clean CARFAX. +++++++++++++++++++++++++ +++++++++++++++++++++ DRIVE WITH CONFIDENCE The LJ WAY! Most used vehicles include a 6 Month / 6000 Mile Warranty, plus we offer a 7-Day Exchange! Learn more: https://www.speedwaychevrolet.com/drive- with-confidence.

Certified 2025 GMC Sierra 3500 SLT w/ X31 Off-Road Package

Certified 2025 GMC Sierra 3500 SLT w/ X31 Off-Road Package Monroe WA 98272

X31 Off-Road Package

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Some vehicles may be subject to manufacturer safety recalls. See if there are any open safety recalls for this vehicle. This does not include non-safety recalls. Recently announced safety recalls may not yet be posted and there may be a delay between the time a repair is made and before it is reported or posted to the website. Before purchasing, be sure to ask the seller for an up-to-date status on any recalls.

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Speedway Chevrolet

 for sale near you in Monroe, WA. Get more information and car pricing for this vehicle on Autotrader.

Certified 2025 GMC Sierra 3500

w/ X31 Off-Road Package SLT