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  • Gray 2020 GMC Sierra 1500 DenaliGray 2020 GMC Sierra 1500 DenaliGray 2020 GMC Sierra 1500 DenaliGray 2020 GMC Sierra 1500 DenaliGray 2020 GMC Sierra 1500 DenaliGray 2020 GMC Sierra 1500 Denali

    $40,195

    $300
    49,200 mi.
    Est. $688/mo

    Mastria GMC Cadillac

    4.5
    Check Availability
    Raynham, MA (14 mi)
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  • Satin Steel Metallic 2020 GMC Sierra 1500 DenaliSatin Steel Metallic 2020 GMC Sierra 1500 DenaliSatin Steel Metallic 2020 GMC Sierra 1500 DenaliSatin Steel Metallic 2020 GMC Sierra 1500 DenaliSatin Steel Metallic 2020 GMC Sierra 1500 DenaliSatin Steel Metallic 2020 GMC Sierra 1500 Denali

    $36,199

    100,991 mi.
    Est. $619/mo

    Tasca Buick GMC Woonsocket

    4.8
    Check Availability
    Woonsocket, RI (27 mi)
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  • White Frost 2020 GMC Sierra 1500 DenaliWhite Frost 2020 GMC Sierra 1500 DenaliWhite Frost 2020 GMC Sierra 1500 DenaliWhite Frost 2020 GMC Sierra 1500 DenaliWhite Frost 2020 GMC Sierra 1500 DenaliWhite Frost 2020 GMC Sierra 1500 Denali

    $35,045

    81,756 mi.
    Est. $600/mo

    Marty's GMC

    4.7
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    Kingston, MA (27 mi)
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  • Onyx Black 2020 GMC Sierra 1500 DenaliOnyx Black 2020 GMC Sierra 1500 DenaliOnyx Black 2020 GMC Sierra 1500 DenaliOnyx Black 2020 GMC Sierra 1500 DenaliOnyx Black 2020 GMC Sierra 1500 DenaliOnyx Black 2020 GMC Sierra 1500 Denali

    $31,890

    $1.1K
    80,864 mi.
    Est. $546/mo

    Excel Auto Lounge

    4.6
    Check Availability
    $599 delivery from Hightstown, NJ (206 mi)
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  • White 2020 GMC Sierra 1500 DenaliWhite 2020 GMC Sierra 1500 DenaliWhite 2020 GMC Sierra 1500 DenaliWhite 2020 GMC Sierra 1500 DenaliWhite 2020 GMC Sierra 1500 DenaliWhite 2020 GMC Sierra 1500 Denali

    $39,998

    78,170 mi.
    Est. $684/mo

    CarMax Hagerstown

    Check Availability
    $199 delivery to Cranston, RI (19 mi)
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  • Onyx Black 2020 GMC Sierra 1500 DenaliOnyx Black 2020 GMC Sierra 1500 DenaliOnyx Black 2020 GMC Sierra 1500 DenaliOnyx Black 2020 GMC Sierra 1500 DenaliOnyx Black 2020 GMC Sierra 1500 DenaliOnyx Black 2020 GMC Sierra 1500 Denali

    $38,625

    $1.5K
    83,916 mi.
    Est. $661/mo

    Cadillac of Norwood

    4.7
    Check Availability
    Norwood, MA (32 mi)
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  • Onyx Black 2020 GMC Sierra 1500 DenaliOnyx Black 2020 GMC Sierra 1500 DenaliOnyx Black 2020 GMC Sierra 1500 DenaliOnyx Black 2020 GMC Sierra 1500 DenaliOnyx Black 2020 GMC Sierra 1500 DenaliOnyx Black 2020 GMC Sierra 1500 Denali

    $37,199

    89,996 mi.
    Est. $637/mo

    Suburban Subaru

    3.4
    Check Availability
    Vernon, CT (72 mi)
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  • Satin Steel Metallic 2020 GMC Sierra 1500 DenaliSatin Steel Metallic 2020 GMC Sierra 1500 DenaliSatin Steel Metallic 2020 GMC Sierra 1500 DenaliSatin Steel Metallic 2020 GMC Sierra 1500 DenaliSatin Steel Metallic 2020 GMC Sierra 1500 DenaliSatin Steel Metallic 2020 GMC Sierra 1500 Denali

    $39,689

    76,689 mi.
    Est. $679/mo

    Auto Factory

    4.2
    Check Availability
    Peabody, MA (57 mi)
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  • GRAY 2020 GMC Sierra 1500 DenaliGRAY 2020 GMC Sierra 1500 DenaliGRAY 2020 GMC Sierra 1500 DenaliGRAY 2020 GMC Sierra 1500 DenaliGRAY 2020 GMC Sierra 1500 DenaliGRAY 2020 GMC Sierra 1500 Denali

    $41,099

    71,267 mi.
    Est. $703/mo

    Auto Factory

    4.2
    Check Availability
    Peabody, MA (57 mi)
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  • $39,352

    $1.1K
    68,337 mi.
    Est. $673/mo

    MacMulkin Chevrolet Cadillac

    4.2
    Check Availability
    Nashua, NH (71 mi)
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GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 Denali 1 Good deal

About the 2020 GMC Sierra 1500 Denali

Basics

Denali shown.

Seating
5
Door count
4
Drivetrain
Rear Wheel Drive
Combined MPG
19
Transmission
10-Speed A/T
Engine
355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel)
Side view of the 2020 GMC Sierra 1500 Denali
FAQs

How much does the 2020 GMC Sierra 1500 Denali cost?

The 2020 GMC Sierra 1500 Denali price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 1500 Denali is $37,693, with pricing starting at $18,479.

What is the MPG of the 2020 GMC Sierra 1500 Denali?

The 2020 GMC Sierra 1500 Denali offers up to 17 MPG in city driving and 23 MPG on the highway for a combined rating of 19 MPG.

These figures are based on EPA mileage ratings and are for comparison purposes only. The actual mileage will vary depending on the selected vehicle options, driving conditions, driving habits, vehicle maintenance, and other factors.

Is the 2020 GMC Sierra 1500 Denali reliable?

The 2020 GMC Sierra 1500 has an average reliability rating of 4.7 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2020 Sierra 1500 owners.

Ratings (69 reviews)

91% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.9
Interior
4.8
Performance
4.8
Value
4.6
Exterior
4.9
Reliability
4.7
Trims

Denali (4 styles)

Style
2WD Crew Cab 157" Denali 4WD Crew Cab 147" Denali 4WD Crew Cab 157" Denali 2WD Crew Cab 147" Denali
Inventory price
Starting at $55,400 Starting at $58,600 Starting at $58,900 Starting at $55,100
Combined MPG
19 18 18 19
Engine
355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel)
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