Used Gray GMC Sierra 1500 for Sale in Longmont, CO

675 results

2025 GMC Sierra 1500

AT4 Crew Cab 4WD

49,509 km

$59,995

CarGurus partner

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:: 49,509
Stock #:: US4061
VIN:: 3GTUUEE84SG185590

2024 GMC Sierra 1500

Denali Crew Cab 4WD

81,337 km

$56,145

CarGurus partner

Year:: 2024
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Exterior colour:: Gray
Transmission:: Automatic
Mileage:: 81,337
Stock #:: RG270020
VIN:: 3GTUUGEL2RG270020

2025 GMC Sierra 1500

AT4 Crew Cab 4WD

43,869 km

$67,990

CarGurus partner

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
Interior colour:: Black
Transmission:: Automatic
Mileage:: 43,869
Stock #:: M26-0294P
VIN:: 3GTUUEE80SG369439

2024 GMC Sierra 1500

Elevation Crew Cab 4WD

65,834 km

$49,999

CarGurus partner

Year:: 2024
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Exterior colour:: Gray
Transmission:: Automatic
Mileage:: 65,834
Stock #:: W2058
VIN:: 3GTUUCED4RG393142

2017 GMC Sierra 1500

SLT Crew Cab 4WD

232,346 km

$19,995

CarGurus partner

Year:: 2017
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 355 hp 5.3L V8
Exterior colour:: Gray
Fuel type:: Gasoline
Interior colour:: Black
Transmission:: Automatic
Mileage:: 232,346
Stock #:: P33606
VIN:: 3GTU2NEC0HG233606

2019 GMC Sierra 1500

SLE Crew Cab 4WD

244,291 km

$16,990

CarGurus partner

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:: Gray (Satin Steel Metallic)
Combined gas mileage:: 14 L/100km
Fuel type:: Gasoline
Interior colour:: Jet Black
Transmission:: Automatic
Mileage:: 244,291
Stock #:: 06622A-113
VIN:: 1GTU9BED7KZ340565

2026 GMC Sierra 1500

Elevation Crew Cab 4WD

4,972 km

$72,623

CarGurus partner

Year:: 2026
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 355 hp 5.3L V8
Exterior colour:: Gray
Combined gas mileage:: 14 L/100km
Fuel type:: Gasoline
Interior colour:: Black
Transmission:: Automatic
Mileage:: 4,972
Stock #:: 461305A
VIN:: 3GTUUCED5TG156389

2021 GMC Sierra 1500

SLT Crew Cab 4WD

58,960 km

$44,390

Great Deal

$779/mo est.

Saint-Jean-sur-Richelieu, QC

1 km away

CarGurus partner

Year:: 2021
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 355 hp 5.3L V8
Exterior colour:: Gray
Fuel type:: Gasoline
Transmission:: Automatic
Mileage:: 58,960
Stock #:: A7206
VIN:: 3GTU9DED9MG335298

2025 GMC Sierra 1500

Pro Regular Cab 4WD

20,408 km

$46,998

CarGurus partner

Year:: 2025
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 2 doors
Drivetrain:: Four-Wheel Drive
Engine:: 310 hp 2.7L I4
Exterior colour:: Gray
Fuel type:: Gasoline
Transmission:: Automatic
Mileage:: 20,408
Stock #:: P11374
VIN:: 3GTNUAEK3SG108041

2023 GMC Sierra 1500

Elevation Crew Cab 4WD

35,913 km

$47,995

CarGurus partner

Year:: 2023
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Exterior colour:: Gray
Transmission:: Automatic
Mileage:: 35,913
Stock #:: 44137J
VIN:: 3GTUUCED5PG318656

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2023 GMC Sierra 1500

Denali Crew Cab 4WD

60,122 km

$57,495

CarGurus partner

Year:: 2023
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:: 60,122
Stock #:: APCB55537
VIN:: 3GTUUGE83PG105537

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2024 GMC Sierra 1500

Denali Crew Cab 4WD

48,741 km

$59,995

CarGurus partner

Year:: 2024
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Exterior colour:: Gray
Transmission:: Automatic
Mileage:: 48,741
Stock #:: 44163J
VIN:: 3GTUUGEL2RG247319

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2021 GMC Sierra 1500

Denali Crew Cab 4WD

181,574 km

$34,880

Year:: 2021
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 277 hp 3L I6 Diesel
Exterior colour:: Gray (Dark Grey)
Combined gas mileage:: 10 L/100km
Fuel type:: Diesel
Interior colour:: Gray (Dark Grey)
Transmission:: Automatic
Mileage:: 181,574
Stock #:: 26046A
VIN:: 1GTU9FET5MZ189467

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2016 GMC Sierra 1500

Base Double Cab 4WD

138,000 km

$12,080

Great Deal

$212/mo est.

Témiscouata-sur-le-lac, QC

1 km away

CarGurus partner

Year:: 2016
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Exterior colour:: Gray (GRIS ACIE)
Interior colour:: Gray
Transmission:: Automatic
Mileage:: 138,000
Stock #:: C6068A
VIN:: 1GTV2LEC9GZ260763

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2023 GMC Sierra 1500

AT4 Crew Cab 4WD

32,736 km

$51,995

CarGurus partner

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:: Gray
Combined gas mileage:: 14 L/100km
Fuel type:: Gasoline
Interior colour:: Black
Transmission:: Automatic
Mileage:: 32,736
Stock #:: 2510109
VIN:: 1GTUUEEL1PZ256210

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2025 GMC Sierra 1500

Elevation Crew Cab 4WD

22,494 km

$53,450

CarGurus partner

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
Fuel type:: Diesel
Transmission:: Automatic
Mileage:: 22,494
Stock #:: 162302
VIN:: 3GTUUCE86SG162302

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2024 GMC Sierra 1500

Elevation Crew Cab 4WD

57,935 km

$50,999

CarGurus partner

Year:: 2024
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
Interior colour:: Gray
Transmission:: Automatic
Mileage:: 57,935
Stock #:: GH-A129719
VIN:: 3GTUUCE81RG397555

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2020 GMC Sierra 1500

Denali Crew Cab 4WD

105,169 km

$43,994

CarGurus partner

Year:: 2020
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 277 hp 3L I6 Diesel
Exterior colour:: Gray
Combined gas mileage:: 10 L/100km
Fuel type:: Diesel
Interior colour:: Black
Transmission:: Automatic
Mileage:: 105,169
Stock #:: T11659A
VIN:: 1GTU9FET4LZ264061

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2021 GMC Sierra 1500

SLE Crew Cab 4WD

190,283 km

$33,555

CarGurus partner

Year:: 2021
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 277 hp 3L I6 Diesel
Exterior colour:: Gray
Combined gas mileage:: 10 L/100km
Fuel type:: Diesel
Transmission:: Automatic
Mileage:: 190,283
Stock #:: D620508
VIN:: 1GTU9BET5MZ258442

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2025 GMC Sierra 1500

AT4 Crew Cab 4WD

40,027 km

$66,399

CarGurus partner

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
Fuel type:: Diesel
Mileage:: 40,027
Stock #:: YEG1023
VIN:: 3GTUUEE84SG370951

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2025 GMC Sierra 1500

SLE Crew Cab 4WD

18,985 km

$56,959

CarGurus partner

Year:: 2025
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:: 18,985
Stock #:: 30717
VIN:: 3GTUUBE80SG354972

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2024 GMC Sierra 1500

AT4 Crew Cab 4WD

25,968 km

$61,995

CarGurus partner

Year:: 2024
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 420 hp 6.2L V8
Exterior colour:: Gray
Combined gas mileage:: 14 L/100km
Fuel type:: Gasoline
Transmission:: Automatic
Mileage:: 25,968
Stock #:: 260742
VIN:: 3GTUUEEL0RG378303

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2024 GMC Sierra 1500

SLE Crew Cab 4WD

136,338 km

$42,608

CarGurus partner

Year:: 2024
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Exterior colour:: Gray
Transmission:: Automatic
Mileage:: 136,338
Stock #:: 380775
VIN:: 3GTUUBED2RG141769

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2023 GMC Sierra 1500

Pro Crew Cab 4WD

44,429 km

$36,999

CarGurus partner

Year:: 2023
Make:: GMC
Model:: Sierra 1500
Body type:: Pickup Truck
Doors:: 4 doors
Drivetrain:: Four-Wheel Drive
Engine:: 310 hp 2.7L I4
Exterior colour:: Gray
Combined gas mileage:: 13 L/100km
Fuel type:: Gasoline
Interior colour:: Gray
Transmission:: Automatic
Mileage:: 44,429
Stock #:: GH-128473
VIN:: 3GTPUAEK2PG168294

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Used GMC Sierra 1500 for Sale with Tow Package in Longmont

Used Gray GMC Sierra 1500 for Sale in Longmont, CO

2025 GMC Sierra 1500

$59,995

2024 GMC Sierra 1500

$56,145

2025 GMC Sierra 1500

$67,990

2024 GMC Sierra 1500

$49,999

2017 GMC Sierra 1500

$19,995

2019 GMC Sierra 1500

$16,990

2026 GMC Sierra 1500

$72,623

2021 GMC Sierra 1500

$44,390

2025 GMC Sierra 1500

$46,998

2023 GMC Sierra 1500

$47,995

2023 GMC Sierra 1500

$57,495

2024 GMC Sierra 1500

$59,995

2021 GMC Sierra 1500

$34,880

2016 GMC Sierra 1500

$12,080

2023 GMC Sierra 1500

$51,995

2025 GMC Sierra 1500

$53,450

2024 GMC Sierra 1500

$50,999

2020 GMC Sierra 1500

$43,994

2021 GMC Sierra 1500

$33,555

2025 GMC Sierra 1500

$66,399

2025 GMC Sierra 1500

$56,959

2024 GMC Sierra 1500

$61,995

2024 GMC Sierra 1500

$42,608

2023 GMC Sierra 1500

$36,999

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