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Used 2021 GMC Sierra 1500 for Sale near Colorado

469 results
Denver, CO
2020 GMC Sierra 1500 Denali Crew Cab 4WD Alpine Buick GMC

2020 GMC Sierra 1500

Denali Crew Cab 4WD

89,471 miles

$33,236

Great Deal
Highlands Ranch, CO
13 mi away
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 color:
Onyx Black
Combined gas mileage:
24 MPG
Fuel type:
Diesel
Interior color:
Jet Black, Forge Perforated Leather-Appointed Seat
Transmission:
Automatic
Mileage:
89,471
Stock number:
TLZ359875
VIN:
1GTU9FET7LZ359875

Sponsored

2022 GMC Sierra 1500 AT4X Crew Cab 4WD

2022 GMC Sierra 1500

AT4X Crew Cab 4WD

28,895 miles

$56,900

Fair Deal
Highlands Ranch, CO
13 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:
Summit White
Combined gas mileage:
16 MPG
Fuel type:
Gasoline
Interior color:
Black (Obsidian Rush)
Transmission:
Automatic
Mileage:
28,895
Stock number:
643388TP
VIN:
3GTUUFEL1NG643388

Sponsored

2021 GMC Sierra 1500 Elevation Crew Cab 4WD

2021 GMC Sierra 1500

Elevation Crew Cab 4WD

120,355 miles

$28,202

Great Deal
Boulder, CO
23 mi away
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 color:
Summit White
Combined gas mileage:
24 MPG
Fuel type:
Diesel
Interior color:
Black
Transmission:
Automatic
Mileage:
120,355
Stock number:
G125192
VIN:
3GTU9CET4MG125192

Sponsored

2021 GMC Sierra 1500 Elevation Crew Cab 4WD

2021 GMC Sierra 1500

Elevation Crew Cab 4WD

120,355 miles

$28,202

Great Deal
Boulder, CO
23 mi away
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 color:
Summit White
Combined gas mileage:
24 MPG
Fuel type:
Diesel
Interior color:
Black
Transmission:
Automatic
Mileage:
120,355
Stock number:
G125192
VIN:
3GTU9CET4MG125192

2021 GMC Sierra 1500 AT4 Crew Cab 4WD

2021 GMC Sierra 1500

AT4 Crew Cab 4WD

81,605 miles

$39,797

Fair Deal
Store transfer to Denver, CO
800 mi away • Price includes $799 shipping Price includes $799 shipping
Year:
2021
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:
81,605
Stock number:
26095437
VIN:
3GTP9EEL6MG413823

2020 GMC Sierra 1500 Denali Crew Cab 4WD

2020 GMC Sierra 1500

Denali Crew Cab 4WD

37,891 miles

$41,700

Great Deal
Highlands Ranch, CO
13 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:
Pacific Blue Metallic
Combined gas mileage:
17 MPG
Fuel type:
Gasoline
Interior color:
Gray (Dark Walnut/Dark Ash Grey)
Transmission:
Automatic
Mileage:
37,891
Stock number:
DPLZ225419
VIN:
1GTU9FEL2LZ225419

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2020 GMC Sierra 1500

Denali Crew Cab 4WD

64,409 miles

$37,897

Great Deal
Parker, CO
7 mi away
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 color:
Onyx Black
Combined gas mileage:
24 MPG
Fuel type:
Diesel
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
64,409
Stock number:
250927
VIN:
3GTU9FET2LG368659

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2021 GMC Sierra 1500

Elevation Crew Cab 4WD

84,105 miles

$32,988

Good Deal
Dacono, CO
23 mi away
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 color:
Pacific Blue Metallic
Combined gas mileage:
24 MPG
Fuel type:
Diesel
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
84,105
Stock number:
P9208A
VIN:
1GTU9CET6MZ294291

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2021 GMC Sierra 1500

Elevation Crew Cab 4WD

85,564 miles

$31,302

Great Deal
Brighton, CO
18 mi away
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 color:
Onyx Black
Combined gas mileage:
24 MPG
Fuel type:
Diesel
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
85,564
Stock number:
S5986A
VIN:
3GTU9CET5MG162347

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2020 GMC Sierra 1500

Denali Crew Cab 4WD

59,581 miles

$39,997

Good Deal
Highlands Ranch, CO
13 mi away
Year:
2020
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:
19 MPG
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
10-Speed Automatic
Mileage:
59,581
Stock number:
KM111036
VIN:
1GTU9FED7LZ111036

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2021 GMC Sierra 1500

Denali Crew Cab 4WD

135,211 miles

$30,995

Fair Deal
Longmont, CO
28 mi away
Year:
2021
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:
17 MPG
Fuel type:
Gasoline
Interior color:
Black
Transmission:
Automatic
Mileage:
135,211
Stock number:
17245
VIN:
1GTU9FEL9MZ225841

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2022 GMC Sierra 1500

Elevation Crew Cab RWD

35,355 miles

$38,497

Good Deal
Store transfer to Denver, CO
1,015 mi away • Price includes $1,499 shipping Price includes $1,499 shipping
Year:
2022
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
4X2
Engine:
310 hp 2.7L I4
Exterior color:
Red
Combined gas mileage:
20 MPG
Fuel type:
Gasoline
Interior color:
Black
Transmission:
Automatic
Mileage:
35,355
Stock number:
28097067
VIN:
3GTPHCEK8NG687878

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2021 GMC Sierra 1500

SLT Crew Cab 4WD

121,386 miles

$29,900

Good Deal
Littleton, CO
13 mi away
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 color:
Black
Combined gas mileage:
24 MPG
Fuel type:
Diesel
Interior color:
Black
Transmission:
Automatic
Mileage:
121,386
Stock number:
CJ 281301
VIN:
1GTU9DET9MZ281301

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2021 GMC Sierra 1500

AT4 Crew Cab 4WD

39,518 miles

$42,271

Good Deal
Boulder, CO
23 mi away
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 color:
Gray (Steel Metallic)
Combined gas mileage:
24 MPG
Fuel type:
Diesel
Interior color:
Jet Black With Kalahari Accents
Transmission:
Automatic
Mileage:
39,518
Stock number:
G423589
VIN:
1GTU9EET4MZ423589

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2022 GMC Sierra 1500

AT4 Crew Cab 4WD

66,998 miles

$40,931

Great Deal
Highlands Ranch, CO
13 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:
Onyx Black
Combined gas mileage:
16 MPG
Fuel type:
Gasoline
Interior color:
Jet Black With Kalahari Accents, Perforated Leathe
Transmission:
Automatic
Mileage:
66,998
Stock number:
ANG589886
VIN:
3GTPUEELXNG589886

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2021 GMC Sierra 1500

SLT Crew Cab 4WD

94,189 miles

$30,731

Great 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:
277 hp 3L I6 Diesel
Exterior color:
Pacific Blue Metallic
Combined gas mileage:
24 MPG
Fuel type:
Diesel
Interior color:
Jet Black, Perforated Leather-Appointed Front Outb
Transmission:
Automatic
Mileage:
94,189
Stock number:
AMZ159665
VIN:
1GTU9DET7MZ159665

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2020 GMC Sierra 1500

Denali Crew Cab 4WD

51,486 miles

$39,950

Great Deal
Franktown, CO
28 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:
51,486
Stock number:
25300
VIN:
1GTU9FEL0LZ293993

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2022 GMC Sierra 1500

AT4 Crew Cab 4WD

15,299 miles

$50,431

Great Deal
Highlands Ranch, CO
13 mi 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 color:
Titanium Rush Metallic
Combined gas mileage:
24 MPG
Fuel type:
Diesel
Interior color:
Jet Black With Kalahari Accents, Perforated Leathe
Transmission:
Automatic
Mileage:
15,299
Stock number:
ANZ595152
VIN:
1GTUUEET2NZ595152

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2020 GMC Sierra 1500

Denali Crew Cab 4WD

46,811 miles

$40,089

Great Deal
Highlands Ranch, CO
13 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, Forge Perforated Leather-Appointed Seat
Transmission:
Automatic
Mileage:
46,811
Stock number:
TLZ288199
VIN:
1GTU9FELXLZ288199

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2020 GMC Sierra 1500

Denali Crew Cab 4WD

89,471 miles

$33,236

Great Deal
Highlands Ranch, CO
13 mi away
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 color:
Onyx Black
Combined gas mileage:
24 MPG
Fuel type:
Diesel
Interior color:
Jet Black, Forge Perforated Leather-Appointed Seat
Transmission:
Automatic
Mileage:
89,471
Stock number:
TLZ359875
VIN:
1GTU9FET7LZ359875

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2020 GMC Sierra 1500

AT4 Crew Cab 4WD

105,252 miles

$33,963

Good Deal
Brighton, CO
15 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

Sponsored

  1. Home
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  3. / GMC Sierra 1500
  4. / 2021
  5. / Colorado
Overview
Reviews
FAQs
Picture of 2021 GMC Sierra 1500

Unless you can’t live without the deeply-satisfying rumble of a V8 engine, the 2021 GMC Sierra 1500 is at its best when equipped with the affordable Duramax turbodiesel inline-six.

GMC is the “professional grade” brand at General Motors, but that’s just marketing mumbo jumbo. The 2021 GMC Sierra 1500 is the same thing as a Chevrolet Silverado 1500, but with different styling and a handful of unique features, like an optional carbon-fiber composite cargo bed. This year, GMC makes several changes to its full-size light-duty pickup truck, none of them earth-shattering. This remains a fundamentally appealing truck in need of attention to the details.

4.9 Overall rating

(46 reviews)
Matthew B
5.0
Reviewed a 2021 GMC AT4 Crew Cab 4WD on Jan 07, 2025

Best truck I have driven! Highway speeds are great and feels like I’m driving a Cadillac.

Greg O
5.0
Reviewed a 2021 GMC Sierra 1500 on Feb 15, 2024

Nice vehicle! Liked it better than the same year Ram.

cameron s
5.0
Reviewed a 2021 GMC Sierra 1500 on Jan 09, 2024

Its great looking and functioning very smooth with a excellent warranty. I miss the trunk in my Ridgeline but there are so many aftermarket applications Im excited to build this truck out.

Donald P
5.0
Reviewed a 2021 GMC Sierra 1500 on Oct 08, 2023

I love everything about this truck, so much I bought one. I got one with the 3liter duramax. Hopefully it’ll be the last truck I’ll ever own.

Randy R
5.0
Reviewed a 2021 GMC Sierra 1500 on Jun 05, 2023

The features on the 2021 GMC Sierra was everything and more then what I expected. The value of the truck was decent considering the times we live in now. Would highly recommend GMC so far

2021 GMC Sierra 1500 FAQs

How much does the 2021 GMC Sierra 1500 cost in Colorado?

The average 2021 GMC Sierra 1500 costs about $36,959.72. The average price has decreased by -7.5% since last year. The 469 for sale near Colorado on CarGurus, range from $17,463 to $63,934 in price.

Is the 2021 GMC Sierra 1500 a good car?

CarGurus experts gave the 2021 GMC Sierra 1500 an overall rating of 5.7/10 and 2021 GMC Sierra 1500 owners have rated the vehicle a 4.9/5 stars on average. If a vehicle has both strong expert and owner reviews, you can feel confident in its quality. If either expert reviews, owner reviews, or both are spotty, you might want to do some research to figure out where the car falls short.

How many 2021 GMC Sierra 1500 vehicles in Colorado have no reported accidents or damage?

423 out of 469 for sale near Colorado have no reported accidents or damage.

Is the 2021 GMC Sierra 1500 safe?

CarGurus experts gave the 2021 GMC Sierra 1500 a safety rating of 4/10.

What is the fuel economy of the 2021 GMC Sierra 1500?

Depending on the engine and options, the 2021 GMC Sierra 1500 gets between 16 and 26 MPG (or MPGe).

What fuel types are available?

Diesel, Flex Fuel Vehicle, Gasoline engines are available.

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