CarGurus Logo Homepage Link
  • Buy
    • Used cars
    • New cars
    • Certified pre-owned
    • Start your purchase online
    • Dealerships near me
  • Sell
    • Sell my car
    • Car values
    • Sell my car FAQs
  • Finance
    • Prequalify for financing
    • How does it work?
    • Financing FAQs
  • Research
    • Test drive reviews
    • Price trends
    • Tips & advice
    • Electric cars
    • Compare cars
  • Discover
    The latest way to shop:
    smarter research, better
    listings.
  • Saved cars & searches
  • Sign in / Register
    • My account
    • Saved searches
    • Saved cars
    • Recommended cars
    • Browsing history
    • Financing dashboard
      • United States (EN)
      • Estados Unidos (ES)
      • Canada (EN)
      • Canada (FR)
      • United Kingdom

Used GMC Sierra 1500 AT4 for Sale near Idledale, CO

274 results
Idledale, CO
2023 GMC Sierra 1500 AT4 Crew Cab 4WD ClearShift

2023 GMC Sierra 1500

AT4 Crew Cab 4WD

28,781 miles

$53,997

Fair Deal
Highlands Ranch, CO
17 mi 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 color:
Summit White
Combined gas mileage:
17 MPG
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
28,781
Stock number:
KM297088
VIN:
1GTUUEEL4PZ297088

Sponsored

2020 GMC Sierra 1500 AT4 Crew Cab 4WD

2020 GMC Sierra 1500

AT4 Crew Cab 4WD

83,415 miles

$34,798

Great Deal
Englewood, CO
21 mi away
Year:
2020
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
420 hp 6.2L V8
Exterior color:
Gray (Satin Steel Metallic)
Combined gas mileage:
17 MPG
Fuel type:
Gasoline
Interior color:
Jet Black With Kalahari Accents
Transmission:
Automatic
Mileage:
83,415
Stock number:
LZ333006
VIN:
1GTP9EEL3LZ333006

Sponsored

2020 GMC Sierra 1500 AT4 Crew Cab 4WD

2020 GMC Sierra 1500

AT4 Crew Cab 4WD

24,799 miles

$45,579

Good Deal
Frederick, CO
34 mi away
Year:
2020
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
420 hp 6.2L V8
Combined gas mileage:
17 MPG
Fuel type:
Gasoline
Transmission:
Automatic
Mileage:
24,799
VIN:
3GTP9EEL0LG348630

Sponsored

2019 GMC Sierra 1500 AT4 Crew Cab 4WD

2019 GMC Sierra 1500

AT4 Crew Cab 4WD

120,501 miles

$31,000

Good Deal
Denver, CO
13 mi away
Year:
2019
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
420 hp 6.2L V8
Exterior color:
Red Quartz Tintcoat
Fuel type:
Gasoline
Interior color:
Jet Black With Kalahari Accents
Transmission:
Automatic
Mileage:
120,501
Stock number:
132399
VIN:
3GTP9EEL9KG132399

2024 GMC Sierra 1500 AT4 Crew Cab 4WD

2024 GMC Sierra 1500

AT4 Crew Cab 4WD

16,790 miles

$55,989

Great Deal
Highlands Ranch, CO
17 mi away
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 color:
Sterling Metallic
Combined gas mileage:
17 MPG
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
10-Speed Automatic
Mileage:
16,790
Stock number:
KM372154
VIN:
3GTUUEEL1RG372154

2023 GMC Sierra 1500 AT4 Crew Cab 4WD

2023 GMC Sierra 1500

AT4 Crew Cab 4WD

46,140 miles

$48,933

Good Deal
Highlands Ranch, CO
15 mi away
Year:
2023
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
3L I6 Diesel
Exterior color:
Volcanic Red Tintcoat
Combined gas mileage:
24 MPG
Fuel type:
Diesel
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
46,140
Stock number:
HPPG348913
VIN:
3GTUUEE88PG348913

Preparing for a close up...

Photos coming soon

2024 GMC Sierra 1500

AT4 Crew Cab 4WD

20,176 miles

$52,990

Great Deal
Northglenn, CO
20 mi away
Year:
2024
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
3L I6 Diesel
Exterior color:
Onyx Black
Combined gas mileage:
25 MPG
Fuel type:
Diesel
Interior color:
Jet Black With Kalahari Accents
Transmission:
Automatic
Mileage:
20,176
Stock number:
CP6657
VIN:
3GTUUEE85RG397019

Preparing for a close up...

Photos coming soon

2021 GMC Sierra 1500

AT4 Crew Cab 4WD

52,079 miles

$40,998

Fair Deal
Certified Pre-Owned
Longmont, CO
36 mi away
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 color:
Summit White
Combined gas mileage:
18 MPG
Fuel type:
Gasoline
Interior color:
Jet Black With Kalahari Accents
Transmission:
Automatic
Mileage:
52,079
Stock number:
L366809
VIN:
3GTP9EED5MG366809

Preparing for a close up...

Photos coming soon

2022 GMC Sierra 1500

AT4 Crew Cab 4WD

67,778 miles

$43,998

Good Deal
Parker, CO
27 mi away
Year:
2022
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
420 hp 6.2L V8
Exterior color:
Black
Combined gas mileage:
16 MPG
Fuel type:
Gasoline
Interior color:
Black
Transmission:
Automatic
Mileage:
67,778
Stock number:
27940373
VIN:
3GTPUEEL9NG561240

Preparing for a close up...

Photos coming soon

2020 GMC Sierra 1500

AT4 Crew Cab 4WD

83,415 miles

$34,798

Great Deal
Englewood, CO
21 mi away
Year:
2020
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
420 hp 6.2L V8
Exterior color:
Gray (Satin Steel Metallic)
Combined gas mileage:
17 MPG
Fuel type:
Gasoline
Interior color:
Jet Black With Kalahari Accents
Transmission:
Automatic
Mileage:
83,415
Stock number:
LZ333006
VIN:
1GTP9EEL3LZ333006

Preparing for a close up...

Photos coming soon

2020 GMC Sierra 1500

AT4 Crew Cab 4WD

75,087 miles

$38,257

Good Deal
Parker, CO
20 mi away
Year:
2020
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
420 hp 6.2L V8
Exterior color:
Red Quartz Tintcoat
Combined gas mileage:
17 MPG
Fuel type:
Gasoline
Interior color:
Jet Black With Kalahari Accents
Transmission:
Automatic
Mileage:
75,087
Stock number:
251079
VIN:
1GTP9EEL2LZ297423

Preparing for a close up...

Photos coming soon

2020 GMC Sierra 1500

AT4 Crew Cab 4WD

105,252 miles

$32,865

Great Deal
Brighton, CO
29 mi away
Year:
2020
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
420 hp 6.2L V8
Exterior color:
Gray (Satin Steel Metallic)
Combined gas mileage:
17 MPG
Fuel type:
Gasoline
Interior color:
Jet Black With Kalahari Accents
Transmission:
Automatic
Mileage:
105,252
Stock number:
G616902A
VIN:
3GTP9EEL3LG107578

Preparing for a close up...

Photos coming soon

2021 GMC Sierra 1500

AT4 Crew Cab 4WD

90,096 miles

$35,654

Good Deal
Brighton, CO
29 mi away
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 color:
Gray (Dark Sky Metallic)
Combined gas mileage:
18 MPG
Fuel type:
Gasoline
Interior color:
Jet Black With Kalahari Accents
Transmission:
Automatic
Mileage:
90,096
Stock number:
G603434A
VIN:
1GTP9EED2MZ178667

Preparing for a close up...

Photos coming soon

2019 GMC Sierra 1500

AT4 Crew Cab 4WD

97,458 miles

$33,999

Good Deal
Golden, CO
5 mi away
Year:
2019
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
420 hp 6.2L V8
Exterior color:
Summit White
Fuel type:
Gasoline
Interior color:
Jet Black With Kalahari Accents
Transmission:
Automatic
Mileage:
97,458
Stock number:
KG112397
VIN:
3GTP9EEL4KG112397

Preparing for a close up...

Photos coming soon

2021 GMC Sierra 1500

AT4 Crew Cab 4WD

26,777 miles

$43,412

Good Deal
Highlands Ranch, CO
13 mi away
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 color:
Gray (Dark Sky Metallic)
Combined gas mileage:
18 MPG
Fuel type:
Gasoline
Interior color:
Jet Black With Kalahari Accents, Perforated Leathe
Transmission:
Automatic
Mileage:
26,777
Stock number:
TMZ159892
VIN:
1GTP9EED2MZ159892

Preparing for a close up...

Photos coming soon

2021 GMC Sierra 1500

AT4 Crew Cab 4WD

83,957 miles

$37,867

Good Deal
Franktown, CO
32 mi away
Year:
2021
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Combined gas mileage:
18 MPG
Fuel type:
Gasoline
Transmission:
Automatic
Mileage:
83,957
Stock number:
25455
VIN:
3GTP9EED6MG454896

Preparing for a close up...

Photos coming soon

2019 GMC Sierra 1500

AT4 Crew Cab 4WD

59,951 miles

$37,998

Good Deal
Parker, CO
27 mi 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 color:
Summit White
Combined gas mileage:
17 MPG
Fuel type:
Gasoline
Interior color:
Black
Transmission:
8-Speed Automatic
Mileage:
59,951
Stock number:
KZ185707
VIN:
1GTP9EED5KZ185707

Sponsored

  1. Home
  2. / Used Cars
  3. / GMC Sierra 1500
  4. / AT4
  5. / Colorado
  6. / Idledale
  • GMC Sierra 1500 SLT in Idledale CO

  • GMC Sierra 1500 Denali in Idledale CO

  • GMC Sierra 1500 AT4 in Idledale CO

  • GMC Sierra 1500 Elevation in Idledale CO

  • GMC Sierra 1500 SLE in Idledale CO

  • GMC Sierra 1500 Base in Idledale CO

  • GMC Sierra 1500 Work Truck in Idledale CO

  • GMC Sierra 1500 SL in Idledale CO

  • GMC Sierra 1500 SLE1 in Idledale CO

  • GMC Sierra 1500 SLE2 in Idledale CO

  • GMC Sierra 1500 in Denver CO

  • GMC Sierra 1500 in Castle Rock CO

  • GMC Sierra 1500 in Longmont CO

  • GMC Sierra 1500 in Colorado Springs CO

  • GMC Sierra 1500 in Fort Collins CO

  • GMC Sierra 1500 in Pueblo CO

  • GMC Sierra 1500 in Cheyenne WY

  • GMC Sierra 1500 in Laramie WY

  • GMC Sierra 1500 in Gunnison CO

  • GMC Sierra 1500 in Idledale CO

  • OBS 1990s-era Chevy and Ford Trucks for Sale in Idledale CO

  • Used GMC Electric Cars for Sale

  • Lifted GMC trucks for sale in Idledale CO

  • Work Trucks for Sale in Idledale CO

  • American Made Trucks For Sale in Idledale CO

  • GM Certified Preowned Vehicles for Sale Near Idledale CO

  • Best Pickup Trucks For Sale in Idledale CO

  • 2019 GMC Sierra 1500 AT4 in Idledale CO

  • All Used Cars

  • Manual Transmission Cars

  • Luxury Cars

  • Cars with Red Interior

  • Cheap Manual Cars

  • Hybrid Cars

  • Sports Cars

  • Electric SUVs

  • Cheap Trucks

  • Small Cars

  • Third Row SUVs

  • Three Quarter Ton Trucks

  • Lifted Trucks

  • Manual Transmission Trucks

  • Diesel Trucks

  • Hybrid SUVs

  • Dually Trucks

  • One Ton Trucks

  • Cheap SUVs

  • Lifted Ford Trucks

  • 4x4 Trucks

  • Work Trucks

  • AWD SUVs

  • Ford Trucks

  • Chevrolet Trucks

  • Toyota Trucks

  • Trucks Under $10,000

  • Cars Under $15,000

  • Sports Cars Under $20,000

  • Trucks Under $20,000

  • Used Sedans for Sale with Low Mileage

  • Used SUVs / Crossovers for Sale with Low Mileage

  • Used Hatchbacks for Sale with Low Mileage

  • Used Convertibles for Sale with Low Mileage

  • Used Vans for Sale with Low Mileage

  • Used Minivans for Sale with Low Mileage

  • Used Pickup Trucks for Sale with Low Mileage

  • Used Coupes for Sale with Low Mileage

  • Used Wagons for Sale with Low Mileage

  • Johnson Auto Plaza

  • Mike Maroone Chevrolet Buick GMC Longmont

  • Mike Maroone Cadillac Buick GMC

  • Shortline Buick-GMC

  • AutoNation Buick GMC West

  • Transwest GMC Isuzu

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
  • Careers
  • Advertise with CarGurus
  • For dealers
  • Dealer signup
  • Dealer resources
  • Terms
  • Terms of use
  • Privacy policy
  • Interest-based ads
  • Security
  • Help
  • Help center
  • Contact us
Click for the BBB Business Review of this Auto Listing Service in Cambridge MA
    • United States (EN)
    • Estados Unidos (ES)
    • Canada (EN)
    • Canada (FR)
    • United Kingdom

© 2026 CarGurus, Inc., All Rights Reserved.