New GMC Sierra 1500 AT4 for Sale near St Thomas, ON

81 results

St Thomas, ON

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2025 GMC Sierra 1500

New car

$69,346

Simcoe, ON

72 km away

Year:: 2025
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 3L I6 Diesel
Exterior colour:: Black
Combined gas mileage:: 10 L/100km
Fuel type:: Diesel
Interior colour:: Black
Transmission:: Automatic
Mileage:: 19,938
Stock number:: 5102
VIN:: 3GTUUEE87SG365341

2026 GMC Sierra 1500

New car

$86,548

Exeter, ON

68 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 3L I6 Diesel
Exterior colour:: White
Combined gas mileage:: 11 L/100km
Fuel type:: Diesel
Interior colour:: Black
Transmission:: Automatic
Mileage:: 15
Stock number:: 107428
VIN:: 3GTUUEE82TG326254

2026 GMC Sierra 1500

New car

$86,816

Waterloo, ON

95 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 3L I6 Diesel
Exterior colour:: Summit White
Combined gas mileage:: 11 L/100km
Fuel type:: Diesel
Interior colour:: Jet Black with Kalahari accents
Transmission:: Automatic
Mileage:: 15
Stock number:: 267124
VIN:: 3GTUUEE81TG318999

2026 GMC Sierra 1500

New car

$87,176

Ingersoll, ON

39 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 420 hp 6.2L V8
Exterior colour:: Silver
Combined gas mileage:: 15 L/100km
Fuel type:: Gasoline
Transmission:: Automatic
Mileage:: 25
Stock number:: 26254
VIN:: 3GTUUEELXTG248181

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2026 GMC Sierra 1500

New car

$87,514

Cambridge, ON

99 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 420 hp 6.2L V8
Exterior colour:: White
Combined gas mileage:: 15 L/100km
Fuel type:: Gasoline
Interior colour:: Black
Transmission:: Automatic
Mileage:: 10
Stock number:: 260256
VIN:: 3GTUUEEL8TG164697

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2026 GMC Sierra 1500

New car

$88,102

Waterloo, ON

95 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 3L I6 Diesel
Exterior colour:: Sterling Metallic
Combined gas mileage:: 11 L/100km
Fuel type:: Diesel
Transmission:: Automatic
Mileage:: 170
Stock number:: 267146
VIN:: 3GTUUEE83TG318650

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2026 GMC Sierra 1500

New car

$88,102

Waterloo, ON

95 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 3L I6 Diesel
Exterior colour:: Onyx Black
Combined gas mileage:: 11 L/100km
Fuel type:: Diesel
Transmission:: Automatic
Mileage:: 510
Stock number:: 267125
VIN:: 3GTUUEE87TG255021

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2026 GMC Sierra 1500

New car

$88,834

Waterloo, ON

95 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 420 hp 6.2L V8
Exterior colour:: Sterling Metallic
Combined gas mileage:: 15 L/100km
Fuel type:: Gasoline
Interior colour:: Jet Black with Kalahari accents
Transmission:: Automatic
Mileage:: 15
Stock number:: 267076
VIN:: 1GTUUEEL6TZ287494

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2026 GMC Sierra 1500

New car

$89,100

Blenheim, ON

83 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 3L I6 Diesel
Exterior colour:: Black
Combined gas mileage:: 11 L/100km
Fuel type:: Diesel
Interior colour:: Black
Transmission:: Automatic
Mileage:: 7
Stock number:: T184
VIN:: 3GTUUEE83TG239513

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2026 GMC Sierra 1500

New car

$89,125

Kitchener, ON

93 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 3L I6 Diesel
Exterior colour:: White
Combined gas mileage:: 11 L/100km
Fuel type:: Diesel
Transmission:: Automatic
Mileage:: 102
Stock number:: 264410
VIN:: 3GTUUEE80TG157576

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2026 GMC Sierra 1500

New car

$89,193

Waterloo, ON

95 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 420 hp 6.2L V8
Exterior colour:: Sterling Metallic
Combined gas mileage:: 15 L/100km
Fuel type:: Gasoline
Interior colour:: Jet Black with Kalahari accents
Transmission:: Automatic
Mileage:: 501
Stock number:: 267148
VIN:: 1GTUUEELXTZ295453

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2026 GMC Sierra 1500

New car

$89,404

Simcoe, ON

72 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 3L I6 Diesel
Exterior colour:: White
Combined gas mileage:: 11 L/100km
Fuel type:: Diesel
Interior colour:: Black
Transmission:: Automatic
Mileage:: 125
Stock number:: 26T136
VIN:: 3GTUUEE87TG153265

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2026 GMC Sierra 1500

New car

$89,612

Exeter, ON

68 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 420 hp 6.2L V8
Exterior colour:: Black
Combined gas mileage:: 15 L/100km
Fuel type:: Gasoline
Transmission:: Automatic
Mileage:: 15
Stock number:: 106711
VIN:: 3GTUUEEL6TG239820

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2026 GMC Sierra 1500

New car

$89,965

Petrolia, ON

80 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 3L I6 Diesel
Exterior colour:: Black
Combined gas mileage:: 11 L/100km
Fuel type:: Diesel
Interior colour:: Black
Transmission:: Automatic
Mileage:: 15
Stock number:: 6460700
VIN:: 3GTUUEE84TG310248

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2026 GMC Sierra 1500

New car

$90,078

Exeter, ON

68 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 3L I6 Diesel
Exterior colour:: Black
Combined gas mileage:: 11 L/100km
Fuel type:: Diesel
Transmission:: Automatic
Mileage:: 392
Stock number:: 107346
VIN:: 3GTUUEE82TG250308

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2026 GMC Sierra 1500

New car

$90,207

Exeter, ON

68 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 420 hp 6.2L V8
Exterior colour:: Red
Combined gas mileage:: 15 L/100km
Fuel type:: Gasoline
Transmission:: Automatic
Mileage:: 15
Stock number:: 106714
VIN:: 3GTUUEEL2TG239877

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2026 GMC Sierra 1500

New car

$90,644

Cambridge, ON

99 km away

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 420 hp 6.2L V8
Exterior colour:: White
Combined gas mileage:: 15 L/100km
Fuel type:: Gasoline
Interior colour:: Black
Transmission:: Automatic
Mileage:: 10
Stock number:: 260482
VIN:: 3GTUUEEL2TG233125

Reviews

FAQs

4 Overall rating

(2 reviews)

Anonymous

5.0

Reviewed a 2019 GMC AT4 Crew Cab 4WD on Sep. 08, 2024

The truck had all the features I wanted and the price was in-line, or better with others in my search.

Buddy H

3.0

Reviewed a 2019 GMC AT4 Crew Cab 4WD on Jan. 05, 2025

Slightly over priced for the miles I would pay $29000-$30000 all day

GMC Sierra 1500 AT4 FAQs

What is the fuel economy of the GMC Sierra 1500 AT4?

Depending on the engine and options, the GMC Sierra 1500 AT4 gets between 9 and 14 L/100km (or EV battery range).

What fuel types are available?

Diesel, Gasoline engines are available.