CarGurus Logo Homepage Link
  • Buy
    • Used cars
    • New cars
    • Certified pre-owned
    • Start your purchase online
  • Sell
    • Sell my car
    • Car values
  • Research
    • Test drive reviews
    • Price trends
    • Compare cars
  • Saved cars & searches
  • Sign in / Register
    • My account
    • Saved searches
    • Saved cars
    • Recommended cars
    • Browsing history
      • United States (EN)
      • Estados Unidos (ES)
      • Canada (EN)
      • Canada (FR)
      • United Kingdom

Used GMC Sierra 1500 AT4 for Sale near Thornton, ON

115 results
Barrie, ON
2019 GMC Sierra 1500 AT4 Crew Cab 4WD Clutch - Toronto

2019 GMC Sierra 1500

AT4 Crew Cab 4WD

161,895 kilometres

$37,890

Fair Deal
85 km away
Year:
2019
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior colour:
Black
Combined gas mileage:
14 L/100km
Fuel type:
Gasoline
Interior colour:
Black
Transmission:
Automatic
Mileage:
161,895
Stock number:
89079
VIN:
1GTP9EED8KZ289740

Sponsored

2025 GMC Sierra 1500 AT4 Crew Cab 4WD

2025 GMC Sierra 1500

AT4 Crew Cab 4WD

15,648 kilometres

$76,699

Fair Deal
Certified Pre-Owned
Parry Sound, ON
114 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:
Summit White
Combined gas mileage:
10 L/100km
Fuel type:
Diesel
Interior colour:
Jet Black/Kalahari
Transmission:
Automatic
Mileage:
15,648
Stock number:
30234
VIN:
3GTUUEE80SG213546

Sponsored

2025 GMC Sierra 1500 AT4 Crew Cab 4WD

2025 GMC Sierra 1500

AT4 Crew Cab 4WD

19,228 kilometres

$71,995

Good Deal
Guelph, ON
105 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:
ONYX BLACK
Combined gas mileage:
10 L/100km
Fuel type:
Diesel
Interior colour:
JET BLACK/KALAHARI
Transmission:
Automatic
Mileage:
19,228
Stock number:
26T279A
VIN:
3GTUUEE87SG365341

Sponsored

2025 GMC Sierra 1500 AT4 Crew Cab 4WD

2025 GMC Sierra 1500

AT4 Crew Cab 4WD

17,430 kilometres

$66,396

Great Deal
Port Perry, ON
12 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:
Gray
Combined gas mileage:
10 L/100km
Fuel type:
Diesel
Transmission:
Automatic
Mileage:
17,430
Stock number:
204376U
VIN:
3GTUUEE80SG204376

2023 GMC Sierra 1500 AT4 Crew Cab 4WD

2023 GMC Sierra 1500

AT4 Crew Cab 4WD

34,420 kilometres

$57,495

Great Deal
Mississauga, ON
81 km away
Year:
2023
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:
14 L/100km
Fuel type:
Gasoline
Transmission:
Automatic
Mileage:
34,420
Stock number:
800458A
VIN:
3GTUUEEL3PG217778

Preparing for a close up...

Photos coming soon

2024 GMC Sierra 1500

AT4 Crew Cab 4WD

38,616 kilometres

$59,247

Great Deal
Richmond Hill, ON
56 km away
Year:
2024
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:
10 L/100km
Fuel type:
Diesel
Transmission:
Automatic
Mileage:
38,616
Stock number:
AP1939
VIN:
3GTUUEE83RG239147

Preparing for a close up...

Photos coming soon

2025 GMC Sierra 1500

AT4 Crew Cab 4WD

22,089 kilometres

$66,990

Great Deal
Certified Pre-Owned
Port Hope, ON
122 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:
White
Combined gas mileage:
10 L/100km
Fuel type:
Diesel
Interior colour:
Black
Transmission:
Automatic
Mileage:
22,089
Stock number:
26825A
VIN:
3GTUUEE81SG275991

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

AT4 Crew Cab 4WD

3,371 kilometres

$79,276

Great Deal
Certified Pre-Owned
Alliston, ON
29 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:
3,371
Stock number:
18444A
VIN:
3GTUUEE83TG153859

Preparing for a close up...

Photos coming soon

2024 GMC Sierra 1500

AT4 Crew Cab 4WD

55,688 kilometres

$57,882

Great Deal
Oakville, ON
97 km away
Year:
2024
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Exterior colour:
Gray
Transmission:
Automatic
Mileage:
55,688
Stock number:
B2114
VIN:
3GTUUEEL4RG216707

Preparing for a close up...

Photos coming soon

2023 GMC Sierra 1500

AT4 Crew Cab 4WD

62,676 kilometres

$55,995

Great Deal
Kingston, ON
249 km away
Year:
2023
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:
62,676
Stock number:
CL4140
VIN:
3GTUUEE88PG328953

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

AT4 Crew Cab 4WD

10,000 kilometres

$75,999

Great Deal
Certified Pre-Owned
Simcoe, ON
176 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:
10,000
Stock number:
26T76A
VIN:
3GTUUEE8XTG116274

Preparing for a close up...

Photos coming soon

2019 GMC Sierra 1500

AT4 Double Cab 4WD

105,577 kilometres

$37,490

Great Deal
Toronto, ON
70 km away
Year:
2019
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior colour:
White
Combined gas mileage:
14 L/100km
Fuel type:
Gasoline
Interior colour:
Black
Transmission:
Automatic
Mileage:
105,577
Stock number:
3931
VIN:
1GTR9EED0KZ185641

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

AT4 Crew Cab 4WD

6,166 kilometres

$86,995

Good Deal
Peterborough, ON
108 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:
Brown (Beige)
Combined gas mileage:
11 L/100km
Fuel type:
Diesel
Transmission:
Automatic
Mileage:
6,166
Stock number:
DEMO_22598
VIN:
3GTUUEE80TG122598

Preparing for a close up...

Photos coming soon

2024 GMC Sierra 1500

AT4 Crew Cab 4WD

39,700 kilometres

$65,290

Good Deal
Cobourg, ON
127 km away
Year:
2024
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Exterior colour:
Gray
Interior colour:
Black
Transmission:
Automatic
Mileage:
39,700
Stock number:
RG202145
VIN:
3GTUUEEL6RG202145

Preparing for a close up...

Photos coming soon

2022 GMC Sierra 1500

AT4 Crew Cab 4WD

69,402 kilometres

$55,990

Good Deal
Cobourg, ON
127 km away
Year:
2022
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
277 hp 3L I6 Diesel
Exterior colour:
Black
Combined gas mileage:
10 L/100km
Fuel type:
Diesel
Interior colour:
Black
Transmission:
Automatic
Mileage:
69,402
Stock number:
NG593054
VIN:
3GTUUEET3NG593054

Preparing for a close up...

Photos coming soon

2025 GMC Sierra 1500

AT4 Crew Cab 4WD

21,700 kilometres

$70,594

Good Deal
Trenton, ON
169 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:
White
Combined gas mileage:
10 L/100km
Fuel type:
Diesel
Transmission:
Automatic
Mileage:
21,700
Stock number:
8283A
VIN:
3GTUUEE88SG204450

Preparing for a close up...

Photos coming soon

2022 GMC Sierra 1500

AT4 Crew Cab 4WD

106,911 kilometres

$49,995

Good Deal
Cambridge, ON
119 km away
Year:
2022
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
277 hp 3L I6 Diesel
Exterior colour:
Brown (Beige)
Combined gas mileage:
10 L/100km
Fuel type:
Diesel
Transmission:
Automatic
Mileage:
106,911
Stock number:
S4254
VIN:
3GTUUEET9NG641625

Preparing for a close up...

Photos coming soon

2024 GMC Sierra 1500

AT4 Crew Cab 4WD

22,400 kilometres

$66,490

Good Deal
Cobourg, ON
127 km away
Year:
2024
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Exterior colour:
White
Interior colour:
Black
Transmission:
Automatic
Mileage:
22,400
Stock number:
RG240031
VIN:
3GTUUEEL5RG240031

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

AT4 Crew Cab 4WD

12,433 kilometres

$78,603

Good Deal
Peterborough, ON
108 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:
Brown (Tan)
Combined gas mileage:
11 L/100km
Fuel type:
Diesel
Transmission:
Automatic
Mileage:
12,433
Stock number:
TG151933
VIN:
3GTUUEE81TG151933

Preparing for a close up...

Photos coming soon

2025 GMC Sierra 1500

AT4 Crew Cab 4WD

52,523 kilometres

$66,995

Good Deal
Certified Pre-Owned
Peterborough, ON
108 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:
Silver
Combined gas mileage:
10 L/100km
Fuel type:
Diesel
Transmission:
Automatic
Mileage:
52,523
Stock number:
UT25867
VIN:
3GTUUEE83SG225867

Preparing for a close up...

Photos coming soon

2024 GMC Sierra 1500

AT4 Crew Cab 4WD

48,216 kilometres

$62,995

Good Deal
Listowel, ON
122 km away
Year:
2024
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
3L I6 Diesel
Exterior colour:
Blue
Combined gas mileage:
10 L/100km
Fuel type:
Diesel
Interior colour:
Black
Transmission:
Automatic
Mileage:
48,216
Stock number:
241649
VIN:
3GTUUEE84RG241649

Preparing for a close up...

Photos coming soon

2024 GMC Sierra 1500

AT4 Crew Cab 4WD

68,084 kilometres

$59,995

Good Deal
Certified Pre-Owned
Peterborough, ON
108 km away
Year:
2024
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
3L I6 Diesel
Exterior colour:
Silver
Combined gas mileage:
10 L/100km
Fuel type:
Diesel
Transmission:
Automatic
Mileage:
68,084
Stock number:
UT21293
VIN:
3GTUUEE84RG421293

Preparing for a close up...

Photos coming soon

2025 GMC Sierra 1500

AT4 Crew Cab 4WD

45,365 kilometres

$67,995

Fair Deal
Certified Pre-Owned
Hanover, ON
109 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:
Gray
Combined gas mileage:
10 L/100km
Fuel type:
Diesel
Transmission:
Automatic
Mileage:
45,365
Stock number:
26303A
VIN:
3GTUUEE89SG162631

Sponsored

  1. Home
  2. / Used Cars
  3. / GMC Sierra 1500
  4. / AT4
  5. / Ontario
  6. / Thornton

  • GMC Sierra 1500 Elevation in Thornton ON

  • GMC Sierra 1500 Denali in Thornton ON

  • GMC Sierra 1500 SLE in Thornton ON

  • GMC Sierra 1500 AT4 in Thornton ON

  • GMC Sierra 1500 SLT in Thornton ON

  • GMC Sierra 1500 Base in Thornton ON

  • GMC Sierra 1500 Work Truck in Thornton ON

  • GMC Sierra 1500 SL in Thornton ON

  • GMC Sierra 1500 SLE1 in Thornton ON

  • GMC Sierra 1500 in Barrie ON

  • GMC Sierra 1500 in Innisfil ON

  • GMC Sierra 1500 in Newmarket ON

  • GMC Sierra 1500 in Midland ON

  • GMC Sierra 1500 in Orangeville ON

  • GMC Sierra 1500 in Stouffville ON

  • GMC Sierra 1500 in Richmond Hill ON

  • GMC Sierra 1500 in Vaughan ON

  • GMC Sierra 1500 in Woodbridge ON

  • GMC Sierra 1500 in Thornton ON

  • Best Work Trucks for Sale in Thornton ON

  • GMC Sierra 1500 in Alberta

  • GMC Sierra 1500 in British Columbia

  • GMC Sierra 1500 in Manitoba

  • GMC Sierra 1500 in New Brunswick

  • GMC Sierra 1500 in Newfoundland and Labrador

  • GMC Sierra 1500 in Northwest Territories

  • GMC Sierra 1500 in Nova Scotia

  • GMC Sierra 1500 in Nunavut

  • GMC Sierra 1500 in Ontario

  • GMC Sierra 1500 in Prince Edward Island

  • GMC Sierra 1500 in Quebec

  • GMC Sierra 1500 in Saskatchewan

  • GMC Sierra 1500 in Yukon

  • 2019 GMC Sierra 1500 AT4 in Thornton ON

  • All Used Cars

  • Cheap Cars

  • Manual Transmission Cars

  • Sports Cars

  • Hybrid Cars

  • Red Interior Cars

  • Electric Cars

  • Small Cars

  • AWD Cars

  • Cheap Automatic Transmission Cars

  • Classic Trucks

  • Conversion Vans

  • Three Quarter Ton Trucks

  • Diesel Trucks

  • Small Trucks

  • Chevrolet Diesel Trucks

  • Manual Diesel Trucks

  • One Ton Trucks

  • Cheap Trucks

  • Ford Trucks

  • Cheap SUVs

  • Mercedes-Benz Convertibles

  • Ford Diesel Trucks

  • Mercedes-Benz SUVs

  • BMW Convertibles

  • Chevrolet SUVs

  • Toyota SUVs

  • Nissan SUVs

  • Used Cars Under $10,000

  • Used Cars Under $5,000

  • Used Sedans for Sale with Low Mileage in Thornton

  • Used SUVs / Crossovers for Sale with Low Mileage in Thornton

  • Used Hatchbacks for Sale with Low Mileage in Thornton

  • Used Convertibles for Sale with Low Mileage in Thornton

  • Used Vans for Sale with Low Mileage in Thornton

  • Used Minivans for Sale with Low Mileage in Thornton

  • Used Pickup Trucks for Sale with Low Mileage in Thornton

  • Used Coupes for Sale with Low Mileage in Thornton

  • Used Wagons for Sale with Low Mileage in Thornton

  • Georgian Chevrolet Buick GMC

  • Wilson-Niblett

  • Roy Foss Woodbridge Chevrolet Buick GMC Cadillac

  • Williamson GM Uxbridge

  • Orillia Chevrolet Buick GMC

  • Gateway Chevrolet Buick GMC

  • NewRoads Chevrolet Cadillac Buick GMC

  • Tom Smith Chevrolet Buick GMC

  • Highland Chevrolet Buick GMC Cadillac

  • Bolton GM

  • Gus Brown Port Perry

  • Mike Jackson GM

Connect with us
Download our app
Download on the App Store Get it on Google Play
  • Company
  • About CarGurus
  • Our team
  • Press
  • Investor relations
  • Price trends
  • Advertise with CarGurus
  • For dealers
  • Dealer signup
  • Dealer resources
  • Terms
  • Terms of use
  • Privacy policy
  • Interest-based ads
  • Security
  • Help
  • Help center
  • Contact us
    • United States (EN)
    • Estados Unidos (ES)
    • Canada (EN)
    • Canada (FR)
    • United Kingdom

© 2026 CarGurus, Inc., All Rights Reserved.