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  • Summit White 2021 GMC Sierra 3500 SLESummit White 2021 GMC Sierra 3500 SLESummit White 2021 GMC Sierra 3500 SLESummit White 2021 GMC Sierra 3500 SLESummit White 2021 GMC Sierra 3500 SLESummit White 2021 GMC Sierra 3500 SLE

    $41,803

    82,530 mi.
    Est. $729/mo

    Kian Motors

    3.3
    Plano, TX (21 mi)
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  • Silver 2021 GMC Sierra 3500 DenaliSilver 2021 GMC Sierra 3500 DenaliSilver 2021 GMC Sierra 3500 DenaliSilver 2021 GMC Sierra 3500 DenaliSilver 2021 GMC Sierra 3500 DenaliSilver 2021 GMC Sierra 3500 Denali

    $49,097

    91,317 mi.
    Est. $856/mo

    DallasLeaseReturns.com

    5.0
    Dallas, TX (18 mi)
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  • Cayenne Red Tintcoat 2021 GMC Sierra 3500 SLECayenne Red Tintcoat 2021 GMC Sierra 3500 SLECayenne Red Tintcoat 2021 GMC Sierra 3500 SLECayenne Red Tintcoat 2021 GMC Sierra 3500 SLECayenne Red Tintcoat 2021 GMC Sierra 3500 SLECayenne Red Tintcoat 2021 GMC Sierra 3500 SLE

    $28,900

    264,171 mi.
    Est. $504/mo

    Carpoint DFW

    Dallas, TX (23 mi)
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  • Black 2021 GMC Sierra 3500 SLEBlack 2021 GMC Sierra 3500 SLEBlack 2021 GMC Sierra 3500 SLEBlack 2021 GMC Sierra 3500 SLEBlack 2021 GMC Sierra 3500 SLEBlack 2021 GMC Sierra 3500 SLE

    $44,995

    133,498 mi.
    Est. $784/mo

    Carsandpickups.com of Dallas

    4.6
    Addison, TX (17 mi)
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  • White Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 Denali

    $59,995

    64,885 mi.
    Est. $1,046/mo

    Carsandpickups.com of Dallas

    4.6
    Addison, TX (17 mi)
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  • White Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 Denali

    $56,705

    76,227 mi.
    Est. $989/mo

    Lifted Trucks - Hurst

    Hurst, TX (16 mi)
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  • Pacific Blue Metallic 2021 GMC Sierra 3500 AT4Pacific Blue Metallic 2021 GMC Sierra 3500 AT4Pacific Blue Metallic 2021 GMC Sierra 3500 AT4Pacific Blue Metallic 2021 GMC Sierra 3500 AT4Pacific Blue Metallic 2021 GMC Sierra 3500 AT4Pacific Blue Metallic 2021 GMC Sierra 3500 AT4

    $47,000

    48,710 mi.
    Est. $819/mo

    AutoSavvy Duncanville

    4.2
    Duncanville, TX (29 mi)
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  • Not Priced

    115,533 mi.

    Tradeline Motorcars

    Carrollton, TX (17 mi)
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  • $51,166

    $100
    102,324 mi.
    Est. $892/mo

    Karma DFW Plano

    Plano, TX (22 mi)
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  • $52,998

    130,402 mi.
    Est. $924/mo

    Karma DFW Plano

    Plano, TX (22 mi)
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  • Ebony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 Denali

    $53,372

    90,796 mi.
    Est. $930/mo

    Laura Buick GMC

    4.5
    $1,116 delivery from Collinsville, IL (558 mi)
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  • Quicksilver Metallic 2021 GMC Sierra 3500 DenaliQuicksilver Metallic 2021 GMC Sierra 3500 DenaliQuicksilver Metallic 2021 GMC Sierra 3500 DenaliQuicksilver Metallic 2021 GMC Sierra 3500 DenaliQuicksilver Metallic 2021 GMC Sierra 3500 DenaliQuicksilver Metallic 2021 GMC Sierra 3500 Denali

    $54,990

    $3.5K
    48,311 mi.
    Est. $959/mo

    Unlimited Motors

    4.5
    $1,164 delivery from Westfield, IN (776 mi)
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  • Red 2021 GMC Sierra 3500 BaseRed 2021 GMC Sierra 3500 BaseRed 2021 GMC Sierra 3500 BaseRed 2021 GMC Sierra 3500 BaseRed 2021 GMC Sierra 3500 BaseRed 2021 GMC Sierra 3500 Base

    $27,987

    $1.7K
    100,490 mi.
    Est. $488/mo

    Kevin Grover GMC

    5.0
    Wagoner, OK (225 mi)
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  • Pacific Blue Metallic 2021 GMC Sierra 3500 DenaliPacific Blue Metallic 2021 GMC Sierra 3500 DenaliPacific Blue Metallic 2021 GMC Sierra 3500 DenaliPacific Blue Metallic 2021 GMC Sierra 3500 DenaliPacific Blue Metallic 2021 GMC Sierra 3500 DenaliPacific Blue Metallic 2021 GMC Sierra 3500 Denali

    $50,000

    65,280 mi.
    Est. $872/mo

    AutoSavvy Southwest Houston

    4.1
    Houston, TX (249 mi)
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  • $45,900

    60,732 mi.
    Est. $800/mo

    Lawrence Hall Ford

    4.7
    Anson, TX (163 mi)
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GMC Sierra 3500 prices by year

Model year Average price Deals
2026 GMC Sierra 3500 $90,673 1 Good deal
2024 GMC Sierra 3500 $69,466 6 Good deals

About the 2021 GMC Sierra 3500

Basics

Base shown (base trim).

Seating
2
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 3500
FAQs

How much does the 2021 GMC Sierra 3500 cost?

The 2021 GMC Sierra 3500 price depends on several factors, including the trim level, optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 3500 is $51,847, with pricing starting at $26,900.

What are some similar vehicles and competitors of the 2021 GMC Sierra 3500?

The 2021 GMC Sierra 3500 compares to and/or competes against the following vehicles:


  • RAM 3500
  • GMC Sierra 2500
  • GMC Sierra 1500 Hybrid
  • Chevrolet Silverado 3500
  • Chevrolet Silverado 2500

Is the 2021 GMC Sierra 3500 reliable?

The 2021 GMC Sierra 3500 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 3500 owners.

Is the 2021 GMC Sierra 3500 a good truck?

Below are the Cars.com consumer ratings for the 2021 GMC Sierra 3500.

(2 reviews)
Rating breakdown (out of 5):
Comfort
4.5
Interior
4.5
Performance
5.0
Value
4.0
Exterior
4.5
Reliability
4.0
Ratings (2 reviews)

100% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.5
Interior
4.5
Performance
5.0
Value
4.0
Exterior
4.5
Reliability
4.0
Trims

AT4 (2 styles)

Style
4WD Crew Cab 172" AT4 4WD Crew Cab 159" AT4
Inventory price
Starting at $60,500 Starting at $60,300
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 (8 styles)

Style
2WD Double Cab 162" 4WD Double Cab 162" 4WD Crew Cab 172" 4WD Crew Cab 159" 2WD Crew Cab 159" 2WD Crew Cab 172" 4WD Reg Cab 142" 2WD Reg Cab 142"
Inventory price
Starting at $40,200 Starting at $43,000 Starting at $44,800 Starting at $44,600 Starting at $41,800 Starting at $42,000 Starting at $40,200 Starting at $37,400
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)

Denali (2 styles)

Style
4WD Crew Cab 159" Denali 4WD Crew Cab 172" Denali
Inventory price
Starting at $66,700 Starting at $66,900
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 (8 styles)

Style
4WD Reg Cab 142" SLE 2WD Reg Cab 142" SLE 4WD Crew Cab 159" SLE 2WD Crew Cab 159" SLE 4WD Crew Cab 172" SLE 2WD Crew Cab 172" SLE 2WD Double Cab 162" SLE 4WD Double Cab 162" SLE
Inventory price
Starting at $45,600 Starting at $42,800 Starting at $49,400 Starting at $46,600 Starting at $49,600 Starting at $46,800 Starting at $45,000 Starting at $47,800
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)

SLT (4 styles)

Style
2WD Crew Cab 159" SLT 4WD Crew Cab 172" SLT 2WD Crew Cab 172" SLT 4WD Crew Cab 159" SLT
Inventory price
Starting at $54,600 Starting at $57,600 Starting at $54,800 Starting at $57,400
Combined MPG
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)
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