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  • White Frost Tricoat 2020 GMC Sierra 3500 DenaliWhite Frost Tricoat 2020 GMC Sierra 3500 DenaliWhite Frost Tricoat 2020 GMC Sierra 3500 DenaliWhite Frost Tricoat 2020 GMC Sierra 3500 DenaliWhite Frost Tricoat 2020 GMC Sierra 3500 DenaliWhite Frost Tricoat 2020 GMC Sierra 3500 Denali

    $57,700

    $200
    71,803 mi.
    Est. $1,073/mo

    Yates Mitsubishi

    Check Availability
    Goodyear, AZ (17 mi)
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  • Onyx Black 2020 GMC Sierra 3500 DenaliOnyx Black 2020 GMC Sierra 3500 DenaliOnyx Black 2020 GMC Sierra 3500 DenaliOnyx Black 2020 GMC Sierra 3500 DenaliOnyx Black 2020 GMC Sierra 3500 DenaliOnyx Black 2020 GMC Sierra 3500 Denali

    $69,990

    44,801 mi.
    Est. $1,302/mo

    Lifted Trucks - Glendale

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    Glendale, AZ (9 mi)
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  • $45,995

    89,278 mi.
    Est. $856/mo

    Coulter Cadillac Buick GMC

    4.8
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    Phoenix, AZ (5 mi)
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  • White 2020 GMC Sierra 3500White 2020 GMC Sierra 3500White 2020 GMC Sierra 3500White 2020 GMC Sierra 3500White 2020 GMC Sierra 3500White 2020 GMC Sierra 3500

    $48,998

    54,833 mi.
    Est. $911/mo

    CarMax Capitol Expressway

    4.1
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    $349 delivery to Tolleson, AZ (13 mi)
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  • Black 2020 GMC Sierra 3500 DenaliBlack 2020 GMC Sierra 3500 DenaliBlack 2020 GMC Sierra 3500 DenaliBlack 2020 GMC Sierra 3500 DenaliBlack 2020 GMC Sierra 3500 DenaliBlack 2020 GMC Sierra 3500 Denali

    $68,998

    18,986 mi.
    Est. $1,283/mo

    CarMax Southwest Freeway

    4.7
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    $649 delivery to Tolleson, AZ (13 mi)
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  • Onyx Black 2020 GMC Sierra 3500 DenaliOnyx Black 2020 GMC Sierra 3500 DenaliOnyx Black 2020 GMC Sierra 3500 DenaliOnyx Black 2020 GMC Sierra 3500 DenaliOnyx Black 2020 GMC Sierra 3500 DenaliOnyx Black 2020 GMC Sierra 3500 Denali

    $53,270

    76,542 mi.
    Est. $991/mo

    Martin Swanty Chrysler Dodge Jeep RAM

    4.5
    Check Availability
    Kingman, AZ (158 mi)
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  • Onyx Black 2020 GMC Sierra 3500 DenaliOnyx Black 2020 GMC Sierra 3500 DenaliOnyx Black 2020 GMC Sierra 3500 DenaliOnyx Black 2020 GMC Sierra 3500 DenaliOnyx Black 2020 GMC Sierra 3500 DenaliOnyx Black 2020 GMC Sierra 3500 Denali

    $52,570

    93,358 mi.
    Est. $978/mo

    Martin Swanty Chrysler Dodge Jeep RAM

    4.5
    Check Availability
    Kingman, AZ (158 mi)
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  • Onyx Black 2020 GMC Sierra 3500 Denali

    $68,874

    51,669 mi.
    Est. $1,281/mo

    Findlay Toyota Prescott

    4.8
    Check Availability
    Prescott, AZ (75 mi)
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GMC Sierra 3500 prices by year

Model year Average price Deals
2026 GMC Sierra 3500 $79,646
2024 GMC Sierra 3500 $78,089 10 Good deals

About the 2020 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 2020 GMC Sierra 3500
FAQs

How much does the 2020 GMC Sierra 3500 cost?

The 2020 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 2020 Sierra 3500 is $51,547, with pricing starting at $18,799.

What are some similar vehicles and competitors of the 2020 GMC Sierra 3500?

The 2020 GMC Sierra 3500 compares to and/or competes against the following vehicles:


Is the 2020 GMC Sierra 3500 reliable?

The 2020 GMC Sierra 3500 has an average reliability rating of 4.9 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2020 Sierra 3500 owners.

Is the 2020 GMC Sierra 3500 a good truck?

Below are the Cars.com consumer ratings for the 2020 GMC Sierra 3500.

(9 reviews)
Rating breakdown (out of 5):
Comfort
4.9
Interior
4.9
Performance
4.9
Value
4.7
Exterior
5.0
Reliability
4.9
Ratings (9 reviews)

100% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.9
Interior
4.9
Performance
4.9
Value
4.7
Exterior
5.0
Reliability
4.9
Trims

AT4 (2 styles)

Style
4WD Crew Cab 159" AT4 4WD Crew Cab 172" AT4
Inventory price
Starting at $59,500 Starting at $59,700
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 159" 2WD Crew Cab 172" 2WD Crew Cab 159" 4WD Crew Cab 172" 2WD Reg Cab 142" 4WD Reg Cab 142"
Inventory price
Starting at $39,800 Starting at $42,600 Starting at $44,200 Starting at $41,600 Starting at $41,400 Starting at $44,400 Starting at $37,000 Starting at $39,800
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)

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 (8 styles)

Style
4WD Reg Cab 142" SLE 2WD Reg Cab 142" SLE 4WD Double Cab 162" SLE 2WD Double Cab 162" SLE 4WD Crew Cab 172" SLE 2WD Crew Cab 172" SLE 4WD Crew Cab 159" SLE 2WD Crew Cab 159" SLE
Inventory price
Starting at $44,400 Starting at $41,600 Starting at $46,600 Starting at $43,800 Starting at $48,400 Starting at $45,600 Starting at $48,200 Starting at $45,400
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)

SLT (4 styles)

Style
2WD Crew Cab 172" SLT 4WD Crew Cab 172" SLT 4WD Crew Cab 159" SLT 2WD Crew Cab 159" SLT
Inventory price
Starting at $54,200 Starting at $57,000 Starting at $56,800 Starting at $54,000
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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