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100 University Ave W,
Cobourg, ON K9A 4L1
Thomas Buick GMC Ltd, ON / New Vehicles

New GMC Sierra 3500HDs for sale in Cobourg, ON

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Starting Price:
$119,973
Thomas Price
$114,973
Price does not include taxes and licensing fees.
Finance from
$756 bw
$119,973.00 x 84 months @ 3.99% APR with $0.00 down payment (5.33% effective rate, cost of borrowing $17,624.56). Plus taxes and licence.
Lease from
$1,088 bw
$119,973.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.28% effective rate, cost of borrowing $17,206.30). Plus taxes and licence.
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box AT4 in Silver for sale at Thomas Buick GMC Ltd in Cobourg, ON
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box AT4 4SB Preferred Equipment Group 4x4
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2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box AT4 4SB Preferred Equipment Group 4x4
VIN: 1GT4UVEY3TF313854
  • Stock
    T13854
  • Engine
    6.6L 8Cyl
  • Transmission
    Automatic
  • Fuel Type
    Diesel
Starting Price:
$119,973
Thomas Price
$114,973
Price does not include taxes and licensing fees.
Finance from
$756 bw
$119,973.00 x 84 months @ 3.99% APR with $0.00 down payment (5.33% effective rate, cost of borrowing $17,624.56). Plus taxes and licence.
Lease from
$1,088 bw
$119,973.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.28% effective rate, cost of borrowing $17,206.30). Plus taxes and licence.
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Starting Price:
$126,968
Thomas Price
$121,968
Price does not include taxes and licensing fees.
Finance from
$800 bw
$126,968.00 x 84 months @ 3.99% APR with $0.00 down payment (5.26% effective rate, cost of borrowing $18,652.16). Plus taxes and licence.
Lease from
$1,062 bw
$126,968.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.06% effective rate, cost of borrowing $18,619.35). Plus taxes and licence.
2026 GMC Sierra 3500HD 4WD Crew Cab Long Box Denali in White for sale at Thomas Buick GMC Ltd in Cobourg, ON
2026 GMC Sierra 3500HD 4WD Crew Cab Long Box Denali 5SA Preferred Equipment Group 4x4
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2026 GMC Sierra 3500HD 4WD Crew Cab Long Box Denali 5SA Preferred Equipment Group 4x4
VIN: 1GT4UWEY4TF309494
  • Stock
    T09494
  • Engine
    6.6L 8Cyl
  • Transmission
    Automatic
  • Fuel Type
    Diesel
Starting Price:
$126,968
Thomas Price
$121,968
Price does not include taxes and licensing fees.
Finance from
$800 bw
$126,968.00 x 84 months @ 3.99% APR with $0.00 down payment (5.26% effective rate, cost of borrowing $18,652.16). Plus taxes and licence.
Lease from
$1,062 bw
$126,968.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.06% effective rate, cost of borrowing $18,619.35). Plus taxes and licence.
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Starting Price:
$126,968
Thomas Price
$121,968
Price does not include taxes and licensing fees.
Finance from
$800 bw
$126,968.00 x 84 months @ 3.99% APR with $0.00 down payment (5.26% effective rate, cost of borrowing $18,652.16). Plus taxes and licence.
Lease from
$1,062 bw
$126,968.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.06% effective rate, cost of borrowing $18,619.35). Plus taxes and licence.
2026 GMC Sierra 3500HD 4WD Crew Cab Long Box Denali in Black for sale at Thomas Buick GMC Ltd in Cobourg, ON
2026 GMC Sierra 3500HD 4WD Crew Cab Long Box Denali 5SA Preferred Equipment Group 4x4
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2026 GMC Sierra 3500HD 4WD Crew Cab Long Box Denali 5SA Preferred Equipment Group 4x4
VIN: 1GT4UWEYXTF309631
  • Stock
    T09631
  • Engine
    6.6L 8Cyl
  • Transmission
    Automatic
  • Fuel Type
    Diesel
Starting Price:
$126,968
Thomas Price
$121,968
Price does not include taxes and licensing fees.
Finance from
$800 bw
$126,968.00 x 84 months @ 3.99% APR with $0.00 down payment (5.26% effective rate, cost of borrowing $18,652.16). Plus taxes and licence.
Lease from
$1,062 bw
$126,968.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.06% effective rate, cost of borrowing $18,619.35). Plus taxes and licence.
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Starting Price:
$123,824
Thomas Price
$118,824
Price does not include taxes and licensing fees.
Finance from
$780 bw
$123,824.00 x 84 months @ 3.99% APR with $0.00 down payment (5.29% effective rate, cost of borrowing $18,190.29). Plus taxes and licence.
Lease from
$1,036 bw
$123,824.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.13% effective rate, cost of borrowing $18,158.30). Plus taxes and licence.
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box Denali in Black for sale at Thomas Buick GMC Ltd in Cobourg, ON
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box Denali 5SA Preferred Equipment Group 4x4
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2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box Denali 5SA Preferred Equipment Group 4x4
VIN: 1GT4UWEY1TF292038
  • Stock
    T92038
  • Engine
    6.6L 8Cyl
  • Transmission
    Automatic
  • Fuel Type
    Diesel
Starting Price:
$123,824
Thomas Price
$118,824
Price does not include taxes and licensing fees.
Finance from
$780 bw
$123,824.00 x 84 months @ 3.99% APR with $0.00 down payment (5.29% effective rate, cost of borrowing $18,190.29). Plus taxes and licence.
Lease from
$1,036 bw
$123,824.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.13% effective rate, cost of borrowing $18,158.30). Plus taxes and licence.
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Starting Price:
$120,988
Thomas Price
$115,988
Price does not include taxes and licensing fees.
Finance from
$762 bw
$120,988.00 x 84 months @ 3.99% APR with $0.00 down payment (5.32% effective rate, cost of borrowing $17,773.67). Plus taxes and licence.
Lease from
$1,098 bw
$120,988.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.25% effective rate, cost of borrowing $17,351.87). Plus taxes and licence.
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box AT4 in Black for sale at Thomas Buick GMC Ltd in Cobourg, ON
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box AT4 4SB Preferred Equipment Group 4x4
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2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box AT4 4SB Preferred Equipment Group 4x4
VIN: 1GT4UVEY2TF314929
  • Stock
    T14929A
  • Engine
    6.6L 8Cyl
  • Transmission
    Automatic
  • Fuel Type
    Diesel
Starting Price:
$120,988
Thomas Price
$115,988
Price does not include taxes and licensing fees.
Finance from
$762 bw
$120,988.00 x 84 months @ 3.99% APR with $0.00 down payment (5.32% effective rate, cost of borrowing $17,773.67). Plus taxes and licence.
Lease from
$1,098 bw
$120,988.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.25% effective rate, cost of borrowing $17,351.87). Plus taxes and licence.
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Starting Price:
$121,489
Thomas Price
$116,489
Price does not include taxes and licensing fees.
Finance from
$766 bw
$121,489.00 x 84 months @ 3.99% APR with $0.00 down payment (5.32% effective rate, cost of borrowing $17,847.27). Plus taxes and licence.
Lease from
$1,017 bw
$121,489.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.18% effective rate, cost of borrowing $17,815.88). Plus taxes and licence.
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box Denali in Black for sale at Thomas Buick GMC Ltd in Cobourg, ON
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box Denali 5SA Preferred Equipment Group 4x4
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2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box Denali 5SA Preferred Equipment Group 4x4
VIN: 1GT4UWEY9TF308678
  • Stock
    T08678A
  • Engine
    6.6L 8Cyl
  • Transmission
    Automatic
  • Fuel Type
    Diesel
Starting Price:
$121,489
Thomas Price
$116,489
Price does not include taxes and licensing fees.
Finance from
$766 bw
$121,489.00 x 84 months @ 3.99% APR with $0.00 down payment (5.32% effective rate, cost of borrowing $17,847.27). Plus taxes and licence.
Lease from
$1,017 bw
$121,489.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.18% effective rate, cost of borrowing $17,815.88). Plus taxes and licence.
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Starting Price:
$127,183
Thomas Price
$122,183
Price does not include taxes and licensing fees.
Finance from
$801 bw
$127,183.00 x 84 months @ 3.99% APR with $0.00 down payment (5.26% effective rate, cost of borrowing $18,683.74). Plus taxes and licence.
Lease from
$1,064 bw
$127,183.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.06% effective rate, cost of borrowing $18,650.88). Plus taxes and licence.
2026 GMC Sierra 3500HD 4WD Crew Cab Long Box Denali in Black for sale at Thomas Buick GMC Ltd in Cobourg, ON
2026 GMC Sierra 3500HD 4WD Crew Cab Long Box Denali 5SA Preferred Equipment Group 4x4
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2026 GMC Sierra 3500HD 4WD Crew Cab Long Box Denali 5SA Preferred Equipment Group 4x4
VIN: 1GT4UWEYXTF314991
  • Stock
    T14991
  • Engine
    6.6L 8Cyl
  • Transmission
    Automatic
  • Fuel Type
    Diesel
Starting Price:
$127,183
Thomas Price
$122,183
Price does not include taxes and licensing fees.
Finance from
$801 bw
$127,183.00 x 84 months @ 3.99% APR with $0.00 down payment (5.26% effective rate, cost of borrowing $18,683.74). Plus taxes and licence.
Lease from
$1,064 bw
$127,183.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.06% effective rate, cost of borrowing $18,650.88). Plus taxes and licence.
View Details
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Thomas Price
$135,613
Price does not include taxes and licensing fees.
Finance from
$855 bw
$135,613.00 x 84 months @ 3.99% APR with $0.00 down payment (4.04% effective rate, cost of borrowing $19,922.15). Plus taxes and licence.
Lease from
$1,230 bw
$135,613.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, estimated lease rate, cost of borrowing $19,449.35). Plus taxes and licence.
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box Denali Ultimate in White for sale at Thomas Buick GMC Ltd in Cobourg, ON
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box Denali Ultimate 5SB Preferred Equipment Group 4x4
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2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box Denali Ultimate 5SB Preferred Equipment Group 4x4
VIN: 1GT4UYEY1TF194252
  • Stock
    T94252
  • Engine
    6.6L 8Cyl
  • Transmission
    Automatic
  • Fuel Type
    Diesel
Thomas Price
$135,613
Price does not include taxes and licensing fees.
Finance from
$855 bw
$135,613.00 x 84 months @ 3.99% APR with $0.00 down payment (4.04% effective rate, cost of borrowing $19,922.15). Plus taxes and licence.
Lease from
$1,230 bw
$135,613.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, estimated lease rate, cost of borrowing $19,449.35). Plus taxes and licence.
View Details
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Starting Price:
$126,968
Thomas Price
$121,968
Price does not include taxes and licensing fees.
Finance from
$800 bw
$126,968.00 x 84 months @ 3.99% APR with $0.00 down payment (5.26% effective rate, cost of borrowing $18,652.16). Plus taxes and licence.
Lease from
$1,062 bw
$126,968.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.06% effective rate, cost of borrowing $18,619.35). Plus taxes and licence.
2026 GMC Sierra 3500HD 4WD Crew Cab Long Box Denali in Silver for sale at Thomas Buick GMC Ltd in Cobourg, ON
2026 GMC Sierra 3500HD 4WD Crew Cab Long Box Denali 5SA Preferred Equipment Group 4x4
Confirm Availability
2026 GMC Sierra 3500HD 4WD Crew Cab Long Box Denali 5SA Preferred Equipment Group 4x4
VIN: 1GT4UWEY6TF309545
  • Stock
    T09545
  • Engine
    6.6L 8Cyl
  • Transmission
    Automatic
  • Fuel Type
    Diesel
Starting Price:
$126,968
Thomas Price
$121,968
Price does not include taxes and licensing fees.
Finance from
$800 bw
$126,968.00 x 84 months @ 3.99% APR with $0.00 down payment (5.26% effective rate, cost of borrowing $18,652.16). Plus taxes and licence.
Lease from
$1,062 bw
$126,968.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.06% effective rate, cost of borrowing $18,619.35). Plus taxes and licence.
View Details
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Starting Price:
$123,688
Thomas Price
$118,688
Price does not include taxes and licensing fees.
Finance from
$779 bw
$123,688.00 x 84 months @ 3.99% APR with $0.00 down payment (5.29% effective rate, cost of borrowing $18,170.31). Plus taxes and licence.
Lease from
$1,035 bw
$123,688.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.13% effective rate, cost of borrowing $18,138.35). Plus taxes and licence.
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box Denali in Silver for sale at Thomas Buick GMC Ltd in Cobourg, ON
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box Denali 5SA Preferred Equipment Group 4x4
Confirm Availability
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box Denali 5SA Preferred Equipment Group 4x4
VIN: 1GT4UWEY2TF251059
  • Stock
    T51059
  • Engine
    6.6L 8Cyl
  • Transmission
    Automatic
  • Fuel Type
    Diesel
Starting Price:
$123,688
Thomas Price
$118,688
Price does not include taxes and licensing fees.
Finance from
$779 bw
$123,688.00 x 84 months @ 3.99% APR with $0.00 down payment (5.29% effective rate, cost of borrowing $18,170.31). Plus taxes and licence.
Lease from
$1,035 bw
$123,688.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.13% effective rate, cost of borrowing $18,138.35). Plus taxes and licence.
View Details
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Starting Price:
$120,529
Thomas Price
$115,529
Price does not include taxes and licensing fees.
Finance from
$760 bw
$120,529.00 x 84 months @ 3.99% APR with $0.00 down payment (5.33% effective rate, cost of borrowing $17,706.24). Plus taxes and licence.
Lease from
$1,093 bw
$120,529.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.26% effective rate, cost of borrowing $17,286.04). Plus taxes and licence.
2026 GMC Sierra 3500HD 4WD Crew Cab Long Box AT4 in White for sale at Thomas Buick GMC Ltd in Cobourg, ON
2026 GMC Sierra 3500HD 4WD Crew Cab Long Box AT4 4SB Preferred Equipment Group 4x4
Confirm Availability
2026 GMC Sierra 3500HD 4WD Crew Cab Long Box AT4 4SB Preferred Equipment Group 4x4
VIN: 1GT4UVEY3TF302479
  • Stock
    T02479
  • Engine
    6.6L 8Cyl
  • Transmission
    Automatic
  • Fuel Type
    Diesel
Starting Price:
$120,529
Thomas Price
$115,529
Price does not include taxes and licensing fees.
Finance from
$760 bw
$120,529.00 x 84 months @ 3.99% APR with $0.00 down payment (5.33% effective rate, cost of borrowing $17,706.24). Plus taxes and licence.
Lease from
$1,093 bw
$120,529.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.26% effective rate, cost of borrowing $17,286.04). Plus taxes and licence.
View Details
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Starting Price:
$122,463
Thomas Price
$117,463
Price does not include taxes and licensing fees.
Finance from
$772 bw
$122,463.00 x 84 months @ 3.99% APR with $0.00 down payment (5.31% effective rate, cost of borrowing $17,990.36). Plus taxes and licence.
Lease from
$1,025 bw
$122,463.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.16% effective rate, cost of borrowing $17,958.71). Plus taxes and licence.
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box Denali in Black for sale at Thomas Buick GMC Ltd in Cobourg, ON
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box Denali 5SA Preferred Equipment Group 4x4
Confirm Availability
2026 GMC Sierra 3500HD 4WD Crew Cab Standard Box Denali 5SA Preferred Equipment Group 4x4
VIN: 1GT4UWEY0TF314448
  • Stock
    T14448
  • Engine
    6.6L 8Cyl
  • Transmission
    Automatic
  • Fuel Type
    Diesel
Starting Price:
$122,463
Thomas Price
$117,463
Price does not include taxes and licensing fees.
Finance from
$772 bw
$122,463.00 x 84 months @ 3.99% APR with $0.00 down payment (5.31% effective rate, cost of borrowing $17,990.36). Plus taxes and licence.
Lease from
$1,025 bw
$122,463.00 x 24 months @ 8.5% APR with $0.00 down payment (20,000 km/yr lease allowance, 11.16% effective rate, cost of borrowing $17,958.71). Plus taxes and licence.
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