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  • Summit White 2021 GMC Sierra 2500 SLESummit White 2021 GMC Sierra 2500 SLESummit White 2021 GMC Sierra 2500 SLESummit White 2021 GMC Sierra 2500 SLESummit White 2021 GMC Sierra 2500 SLESummit White 2021 GMC Sierra 2500 SLE

    $34,999

    97,493 mi.
    Est. $624/mo

    Red's Auto & Truck

    4.0
    Check Availability
    Longmont, CO (29 mi)
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  • Pacific Blue Metallic 2021 GMC Sierra 2500 SLEPacific Blue Metallic 2021 GMC Sierra 2500 SLEPacific Blue Metallic 2021 GMC Sierra 2500 SLEPacific Blue Metallic 2021 GMC Sierra 2500 SLEPacific Blue Metallic 2021 GMC Sierra 2500 SLEPacific Blue Metallic 2021 GMC Sierra 2500 SLE

    $33,998

    $602
    78,205 mi.
    Est. $606/mo

    Berkenkotter Motors Parker

    4.7
    Check Availability
    Parker, CO (22 mi)
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  • White 2021 GMC Sierra 2500 DenaliWhite 2021 GMC Sierra 2500 DenaliWhite 2021 GMC Sierra 2500 DenaliWhite 2021 GMC Sierra 2500 DenaliWhite 2021 GMC Sierra 2500 DenaliWhite 2021 GMC Sierra 2500 Denali

    $55,599

    72,587 mi.
    Est. $991/mo

    Rocky Mountain Eurosport Parker

    4.8
    Check Availability
    Parker, CO (22 mi)
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  • Black 2021 GMC Sierra 2500 SLEBlack 2021 GMC Sierra 2500 SLEBlack 2021 GMC Sierra 2500 SLEBlack 2021 GMC Sierra 2500 SLEBlack 2021 GMC Sierra 2500 SLEBlack 2021 GMC Sierra 2500 SLE

    $33,957

    87,466 mi.
    Est. $605/mo

    Auto Mart USA

    Check Availability
    Aurora, CO (12 mi)
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  • White 2021 GMC Sierra 2500 DenaliWhite 2021 GMC Sierra 2500 DenaliWhite 2021 GMC Sierra 2500 DenaliWhite 2021 GMC Sierra 2500 DenaliWhite 2021 GMC Sierra 2500 DenaliWhite 2021 GMC Sierra 2500 Denali

    $44,995

    165,677 mi.
    Est. $802/mo

    Nice Auto Sales

    Check Availability
    Denver, CO (3 mi)
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  • Summit White 2021 GMC Sierra 2500 DenaliSummit White 2021 GMC Sierra 2500 DenaliSummit White 2021 GMC Sierra 2500 DenaliSummit White 2021 GMC Sierra 2500 DenaliSummit White 2021 GMC Sierra 2500 DenaliSummit White 2021 GMC Sierra 2500 Denali

    $58,678

    60,244 mi.
    Est. $1,045/mo

    Alpine Chevrolet

    4.5
    Check Availability
    Aurora, CO (14 mi)
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  • White Frost Tri-Coat 2021 GMC Sierra 2500 DenaliWhite Frost Tri-Coat 2021 GMC Sierra 2500 DenaliWhite Frost Tri-Coat 2021 GMC Sierra 2500 DenaliWhite Frost Tri-Coat 2021 GMC Sierra 2500 DenaliWhite Frost Tri-Coat 2021 GMC Sierra 2500 DenaliWhite Frost Tri-Coat 2021 GMC Sierra 2500 Denali

    $63,109

    34,599 mi.
    Est. $1,124/mo

    Alpine Chevrolet

    4.5
    Check Availability
    Aurora, CO (14 mi)
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  • Cayenne Red Tintcoat 2021 GMC Sierra 2500 AT4Cayenne Red Tintcoat 2021 GMC Sierra 2500 AT4Cayenne Red Tintcoat 2021 GMC Sierra 2500 AT4Cayenne Red Tintcoat 2021 GMC Sierra 2500 AT4Cayenne Red Tintcoat 2021 GMC Sierra 2500 AT4Cayenne Red Tintcoat 2021 GMC Sierra 2500 AT4

    $54,199

    $495
    70,260 mi.
    Est. $966/mo

    Castle Rock Chevrolet GMC

    4.4
    Check Availability
    Castle Rock, CO (29 mi)
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  • Summit White 2021 GMC Sierra 2500 AT4Summit White 2021 GMC Sierra 2500 AT4Summit White 2021 GMC Sierra 2500 AT4Summit White 2021 GMC Sierra 2500 AT4

    $52,966

    78,853 mi.
    Est. $944/mo

    Christopher's Dodge Ram

    3.3
    Check Availability
    Golden, CO (7 mi)
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  • $52,999

    84,279 mi.
    Est. $944/mo

    AutoNation Buick GMC West

    4.0
    Check Availability
    Golden, CO (7 mi)
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  • White Frost Tricoat 2021 GMC Sierra 2500 DenaliWhite Frost Tricoat 2021 GMC Sierra 2500 DenaliWhite Frost Tricoat 2021 GMC Sierra 2500 DenaliWhite Frost Tricoat 2021 GMC Sierra 2500 DenaliWhite Frost Tricoat 2021 GMC Sierra 2500 DenaliWhite Frost Tricoat 2021 GMC Sierra 2500 Denali

    $61,993

    $459
    39,614 mi.
    Est. $1,104/mo

    Scottsdale Mitsubishi

    3.9
    Check Availability
    $1,148 delivery from Scottsdale, AZ (575 mi)
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  • Summit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLT

    $35,995

    150,489 mi.
    Est. $641/mo

    Laura Buick GMC

    4.5
    Check Availability
    $1,617 delivery from Collinsville, IL (809 mi)
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  • Summit White 2021 GMC Sierra 2500 BaseSummit White 2021 GMC Sierra 2500 BaseSummit White 2021 GMC Sierra 2500 BaseSummit White 2021 GMC Sierra 2500 BaseSummit White 2021 GMC Sierra 2500 BaseSummit White 2021 GMC Sierra 2500 Base

    $23,294

    $200
    195,087 mi.
    Est. $415/mo

    Cowboy Dodge Chrysler Jeep RAM

    4.8
    Check Availability
    Cheyenne, WY (98 mi)
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  • Quicksilver Metallic 2021 GMC Sierra 2500 BaseQuicksilver Metallic 2021 GMC Sierra 2500 BaseQuicksilver Metallic 2021 GMC Sierra 2500 BaseQuicksilver Metallic 2021 GMC Sierra 2500 BaseQuicksilver Metallic 2021 GMC Sierra 2500 BaseQuicksilver Metallic 2021 GMC Sierra 2500 Base

    $38,799

    $500
    69,870 mi.
    Est. $691/mo

    Corwin Toyota Colorado Springs

    4.5
    Check Availability
    Colorado Springs, CO (59 mi)
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  • Summit White 2021 GMC Sierra 2500 DenaliSummit White 2021 GMC Sierra 2500 DenaliSummit White 2021 GMC Sierra 2500 DenaliSummit White 2021 GMC Sierra 2500 DenaliSummit White 2021 GMC Sierra 2500 DenaliSummit White 2021 GMC Sierra 2500 Denali

    $59,681

    84,121 mi.
    Est. $1,063/mo

    Spradley Chevrolet Inc.

    3.1
    Check Availability
    Pueblo, CO (102 mi)
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GMC Sierra 2500 prices by year

Model year Average price Deals
2026 GMC Sierra 2500 $80,834 5 Good deals
2025 GMC Sierra 2500 $74,917 9 Good deals
2024 GMC Sierra 2500 $69,135 5 Great deals

About the 2021 GMC Sierra 2500

Basics

Base shown (base trim).

Seating
3
Door count
2
Drivetrain
Rear-wheel drive
Combined MPG
0
Transmission
6-Speed A/T
Engine
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)
Side view of the 2021 GMC Sierra 2500
FAQs

How much does the 2021 GMC Sierra 2500 cost?

The 2021 GMC Sierra 2500 price depends on several factors, including the trim level, optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 2500 is $51,736, with pricing starting at $22,900.

Is the 2021 GMC Sierra 2500 reliable?

The 2021 GMC Sierra 2500 has an average reliability rating of 4 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2021 Sierra 2500 owners.

Is the 2021 GMC Sierra 2500 a good truck?

Below are the Cars.com consumer ratings for the 2021 GMC Sierra 2500.

(29 reviews)
Rating breakdown (out of 5):
Comfort
4.7
Interior
4.6
Performance
4.3
Value
3.9
Exterior
4.6
Reliability
4.0
Ratings (29 reviews)

75% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.7
Interior
4.6
Performance
4.3
Value
3.9
Exterior
4.6
Reliability
4.0
Trims

AT4 (2 styles)

Style
4WD Crew Cab 172" AT4 4WD Crew Cab 159" AT4
Inventory price
Starting at $59,300 Starting at $59,100
Combined MPG
0 0
Engine
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)

Base (10 styles)

Style
4WD Crew Cab 159" 2WD Crew Cab 172" 4WD Crew Cab 172" 2WD Crew Cab 159" 2WD Double Cab 162" 4WD Double Cab 162" 4WD Double Cab 149" 2WD Double Cab 149" 2WD Reg Cab 142" 4WD Reg Cab 142"
Inventory price
Starting at $43,400 Starting at $40,800 Starting at $43,600 Starting at $40,600 Starting at $39,000 Starting at $41,800 Starting at $41,600 Starting at $38,800 Starting at $36,200 Starting at $39,000
Combined MPG
0 0 0 0 0 0 0 0 0 0
Engine
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)

Denali (2 styles)

Style
4WD Crew Cab 172" Denali 4WD Crew Cab 159" Denali
Inventory price
Starting at $65,700 Starting at $65,500
Combined MPG
0 0
Engine
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)

SLE (10 styles)

Style
4WD Reg Cab 142" SLE 2WD Reg Cab 142" SLE 2WD Crew Cab 172" SLE 4WD Crew Cab 159" SLE 2WD Crew Cab 159" SLE 4WD Crew Cab 172" SLE 2WD Double Cab 162" SLE 2WD Double Cab 149" SLE 4WD Double Cab 149" SLE 4WD Double Cab 162" SLE
Inventory price
Starting at $44,400 Starting at $41,600 Starting at $45,600 Starting at $48,200 Starting at $45,400 Starting at $48,400 Starting at $43,800 Starting at $43,600 Starting at $46,400 Starting at $46,600
Combined MPG
0 0 0 0 0 0 0 0 0 0
Engine
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)

SLT (8 styles)

Style
4WD Double Cab 162" SLT 2WD Double Cab 149" SLT 2WD Double Cab 162" SLT 4WD Double Cab 149" SLT 4WD Crew Cab 159" SLT 2WD Crew Cab 159" SLT 2WD Crew Cab 172" SLT 4WD Crew Cab 172" SLT
Inventory price
Starting at $54,600 Starting at $51,600 Starting at $51,800 Starting at $54,400 Starting at $56,200 Starting at $53,400 Starting at $53,600 Starting at $56,400
Combined MPG
0 0 0 0 0 0 0 0
Engine
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)
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