GMC Sierra-3500-HD for sale in Oshawa at Mills Motors Buick GMC - 1  GMC Sierra-3500-HD for sale in Oshawa at Mills Motors Buick GMC - 1

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** Estimated payment shown is for informational purposes only and does not represent a financing offer or guarantee of credit from the dealer, the manufacturer or any other lender. Estimated payment is calculated based on the information you enter in the Car Loan Calculator estimator tool. Vehicle must have a total financed amount of at least CAD $7,500. The lender will determine each buyer's applicable finance rate in its discretion based on external and internal evaluation methods of credit worthiness.
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    • Clearance
      GMC Sierra 3500 HD 4WD Crew Cab Standard Box Denali 2024
      Stock: 240564-DEMO
      VIN: 1GT49WEY1RF326392
      10,125 KM. Auto., Ext: Onyx Black, Int: Jet Black
      Stock #: 240564-DEMO
      Engine: 6.6 L
      Cylinders: V8
      Transmission: Auto.
      Drive train: Four-wheel drive
      Fuel: Diesel
      Category: Trucks
      Exterior Color: Onyx Black
      Interior Color: Jet Black
      Doors: 4
    • Clearance
      GMC Sierra 3500 HD 4WD Reg Cab 146" WB, 60" CA Pro 2024
      Stock: 240632-NEW
      VIN: 1GD39SEY9RF334479
      394 KM. Auto., Ext: Special Exterior Colour, Int: Jet Black
      Stock #: 240632-NEW
      Engine: DURAMAX 6.6 TURBO-DIESE V8 L
      Cylinders: V8
      Transmission: Auto.
      Drive train: Four-wheel drive
      Fuel: Diesel
      Category: Trucks
      Exterior Color: Special Exterior Colour
      Interior Color: Jet Black
      Doors: 2
    • GMC Sierra 3500 HD 4WD Crew Cab Standard Box Denali Ultimate 2025
      Stock: 250382-NEW
      VIN: 1GT4UYEYXSF128040
      75 KM. Auto., Ext: Onyx Black, Int: Alpine Umber
      Stock #: 250382-NEW
      Engine: 6.6 L
      Cylinders: V8
      Transmission: Auto.
      Drive train: Four-wheel drive
      Fuel: Diesel
      Category: Trucks
      Exterior Color: Onyx Black
      Interior Color: Alpine Umber
      Doors: 4
      Financing 84 months
      430 @ 4.99%
      +HST & Licenses/wk 0 cash down
    • GMC Sierra 3500 HD 4WD Crew Cab Standard Box Denali 2025
      Stock: 250393-NEW
      VIN: 1GT4UWEY7SF269393
      10 KM. Auto., Ext: Onyx Black, Int: Jet Black
      Stock #: 250393-NEW
      Engine: 6.6 L
      Cylinders: V8
      Transmission: Auto.
      Drive train: Four-wheel drive
      Fuel: Diesel
      Category: Trucks
      Exterior Color: Onyx Black
      Interior Color: Jet Black
      Doors: 4
      Financing 84 months
      369 @ 4.99%
      +HST & Licenses/wk 0 cash down
    • GMC Sierra 3500 HD 4WD Crew Cab Standard Box Denali 2025
      Stock: 250417-NEW
      VIN: 1GT4UWE7XSF274434
      10 KM. Auto., Ext: Downpour Metallic, Int: Atmosphere/Brownstone
      Stock #: 250417-NEW
      Engine: 6.6 L
      Cylinders: V8
      Transmission: Auto.
      Drive train: Four-wheel drive
      Fuel: Gas
      Category: Trucks
      Exterior Color: Downpour Metallic
      Interior Color: Atmosphere/Brownstone
      Doors: 4
      Financing 84 months
      360 @ 4.99%
      +HST & Licenses/wk 0 cash down
    • GMC Sierra 3500 HD 4WD Crew Cab Standard Box Denali 2025
      Stock: 250469-NEW
      VIN: 1GT4UWEY0SF291803
      10 KM. Auto., Ext: Summit White, Int: Jet Black
      Stock #: 250469-NEW
      Engine: 6.6 L
      Cylinders: V8
      Transmission: Auto.
      Drive train: Four-wheel drive
      Fuel: Diesel
      Category: Trucks
      Exterior Color: Summit White
      Interior Color: Jet Black
      Doors: 4
      Financing 84 months
      373 @ 4.99%
      +HST & Licenses/wk 0 cash down
    • New arrivals
      GMC Sierra 3500 HD 4WD Crew Cab Standard Box SLE 2025
      Stock: 250523-NEW
      VIN: 1GT4UTE73SF308891
      12 KM. Auto., Ext: Special Exterior colour, Int: Jet Black
      Stock #: 250523-NEW
      Engine: 6.6 L
      Cylinders: V8
      Transmission: Auto.
      Drive train: Four-wheel drive
      Fuel: Gas
      Category: Trucks
      Exterior Color: Special Exterior colour
      Interior Color: Jet Black
      Doors: 4
      Financing 84 months
      273 @ 4.99%
      +HST & Licenses/wk 0 cash down
    The amount shown reflects an estimate of the amount that you can expect to pay in Canadian dollars. Taxes are excluded (unless selected otherwise). Photos for illustration purposes only. While we strive to ensure that the information on this website is accurate, we recommend contacting us directly to verify details and obtain additional information about the vehicle, including confirmation of prices, colors, trims, options, and other specifications.
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