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  • Onyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLT

    $28,491

    $500
    107,073 mi.
    Est. $536/mo

    Mac Haik Chevrolet

    4.8
    Check Availability
    Houston, TX (947 mi)

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  • Deep Mahogany Metallic 2020 GMC Sierra 1500 SLTDeep Mahogany Metallic 2020 GMC Sierra 1500 SLTDeep Mahogany Metallic 2020 GMC Sierra 1500 SLTDeep Mahogany Metallic 2020 GMC Sierra 1500 SLTDeep Mahogany Metallic 2020 GMC Sierra 1500 SLTDeep Mahogany Metallic 2020 GMC Sierra 1500 SLT

    $37,393

    $299
    54,188 mi.
    Est. $703/mo

    Spitzer Chevrolet GMC Cadillac of Dubois

    4.6
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    DuBois, PA (462 mi)

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  • Red Quartz Tintcoat 2020 GMC Sierra 1500 SLTRed Quartz Tintcoat 2020 GMC Sierra 1500 SLTRed Quartz Tintcoat 2020 GMC Sierra 1500 SLTRed Quartz Tintcoat 2020 GMC Sierra 1500 SLTRed Quartz Tintcoat 2020 GMC Sierra 1500 SLTRed Quartz Tintcoat 2020 GMC Sierra 1500 SLT

    $34,995

    87,747 mi.
    Est. $658/mo

    Laura Buick GMC

    4.6
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    Collinsville, IL (254 mi)
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  • White 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLT

    $29,986

    114,226 mi.
    Est. $564/mo

    Classic Chevrolet Beaumont

    4.5
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    Beaumont, TX (891 mi)
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  • Dark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLT

    $33,994

    $605
    60,232 mi.
    Est. $639/mo

    Southwest Kia of Mesquite

    4.1
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    Mesquite, TX (796 mi)
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  • Onyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLT

    $36,995

    89,873 mi.
    Est. $695/mo

    Prestige Auto Mart of Westport

    4.6
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    Westport, MA (854 mi)
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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $34,930

    63,460 mi.
    Est. $657/mo

    Eagle Buick GMC, Inc.

    4.8
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    Homosassa, FL (945 mi)
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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $36,556

    87,265 mi.
    Est. $687/mo

    Van Chevrolet

    4.6
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    Scottsdale, AZ (1,437 mi)

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  • White Frost Tricoat 2020 GMC Sierra 1500 SLTWhite Frost Tricoat 2020 GMC Sierra 1500 SLTWhite Frost Tricoat 2020 GMC Sierra 1500 SLTWhite Frost Tricoat 2020 GMC Sierra 1500 SLTWhite Frost Tricoat 2020 GMC Sierra 1500 SLTWhite Frost Tricoat 2020 GMC Sierra 1500 SLT

    $32,992

    107,030 mi.
    Est. $620/mo

    Advantage Chevrolet of Bolingbrook

    4.8
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    Bolingbrook, IL (27 mi)
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  • Black 2020 GMC Sierra 1500 SLTBlack 2020 GMC Sierra 1500 SLTBlack 2020 GMC Sierra 1500 SLTBlack 2020 GMC Sierra 1500 SLTBlack 2020 GMC Sierra 1500 SLTBlack 2020 GMC Sierra 1500 SLT

    $35,933

    73,959 mi.
    Est. $675/mo

    Star GMC of Easton

    4.5
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    Easton, PA (646 mi)
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  • White 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLT

    $35,750

    66,794 mi.
    Est. $672/mo

    Blade Chevrolet

    4.8
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    Mount Vernon, WA (1,735 mi)
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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $31,194

    $1.6K
    100,048 mi.
    Est. $586/mo

    Brandon Hyundai

    4.4
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    Tampa, FL (1,008 mi)
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  • Black 2020 GMC Sierra 1500 SLTBlack 2020 GMC Sierra 1500 SLTBlack 2020 GMC Sierra 1500 SLTBlack 2020 GMC Sierra 1500 SLTBlack 2020 GMC Sierra 1500 SLTBlack 2020 GMC Sierra 1500 SLT

    $30,825

    127,086 mi.
    Est. $579/mo

    DallasLeaseReturns.com

    5.0
    Check Availability
    Dallas, TX (797 mi)
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  • Deep Mahogany Metallic 2020 GMC Sierra 1500 SLTDeep Mahogany Metallic 2020 GMC Sierra 1500 SLTDeep Mahogany Metallic 2020 GMC Sierra 1500 SLTDeep Mahogany Metallic 2020 GMC Sierra 1500 SLTDeep Mahogany Metallic 2020 GMC Sierra 1500 SLTDeep Mahogany Metallic 2020 GMC Sierra 1500 SLT

    $36,697

    73,934 mi.
    Est. $690/mo

    Richardson Buick GMC - Midland

    4.8
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    Midland, MI (211 mi)

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  • Dark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLT

    $31,000

    $3K
    62,354 mi.
    Est. $583/mo

    Five Star Ford

    4.9
    Check Availability
    North Richland Hills, TX (817 mi)
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  • Black 2020 GMC Sierra 1500 SLTBlack 2020 GMC Sierra 1500 SLTBlack 2020 GMC Sierra 1500 SLTBlack 2020 GMC Sierra 1500 SLTBlack 2020 GMC Sierra 1500 SLTBlack 2020 GMC Sierra 1500 SLT

    $35,985

    $100
    80,201 mi.
    Est. $676/mo

    Estero Bay Chevrolet

    4.4
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    Estero, FL (1,119 mi)
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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $31,895

    113,983 mi.
    Est. $600/mo

    Phil Wright Autoplex

    4.7
    Check Availability
    Russellville, AR (543 mi)
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  • Onyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLT

    $44,997

    75,639 mi.
    Est. $846/mo

    Beaver Chevrolet

    4.6
    Check Availability
    Jacksonville, FL (868 mi)
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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $35,597

    $200
    88,068 mi.
    Est. $669/mo

    Bob Howard Chrysler Dodge Jeep RAM

    4.6
    Check Availability
    Oklahoma City, OK (686 mi)
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  • Satin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLT

    $40,576

    $412
    40,583 mi.
    Est. $763/mo

    Burtness Chevrolet

    4.8
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    Orfordville, WI (99 mi)

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  • Yellow 2020 GMC Sierra 1500 SLTYellow 2020 GMC Sierra 1500 SLTYellow 2020 GMC Sierra 1500 SLTYellow 2020 GMC Sierra 1500 SLTYellow 2020 GMC Sierra 1500 SLTYellow 2020 GMC Sierra 1500 SLT

    $29,995

    102,312 mi.
    Est. $564/mo

    Bristol Auto Mall

    4.9
    Check Availability
    Levittown, PA (678 mi)
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  • Satin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLT

    $34,219

    95,857 mi.
    Est. $643/mo

    Pat McGrath Chevyland

    4.4
    Check Availability
    Cedar Rapids, IA (208 mi)
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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $33,995

    $970
    76,323 mi.
    Est. $639/mo

    Suntrup Kia South

    4.8
    Check Availability
    St. Louis, MO (273 mi)
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  • Onyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLT

    $36,929

    78,851 mi.
    Est. $694/mo

    Cape Coral Chrysler Dodge Jeep Ram

    4.2
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    Cape Coral, FL (1,100 mi)
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  • Red Quartz Tintcoat 2020 GMC Sierra 1500 SLTRed Quartz Tintcoat 2020 GMC Sierra 1500 SLTRed Quartz Tintcoat 2020 GMC Sierra 1500 SLTRed Quartz Tintcoat 2020 GMC Sierra 1500 SLTRed Quartz Tintcoat 2020 GMC Sierra 1500 SLTRed Quartz Tintcoat 2020 GMC Sierra 1500 SLT

    $33,800

    $190
    84,172 mi.
    Est. $635/mo

    Jarrett Gordon Ford Lincoln of Winter Haven

    4.9
    Check Availability
    Winter Haven, FL (1,012 mi)
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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $34,450

    86,849 mi.
    Est. $648/mo

    Hardy Chevrolet Gainesville

    4.8
    Check Availability
    Gainesville, GA (564 mi)

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  • Quicksilver Metallic 2020 GMC Sierra 1500 SLTQuicksilver Metallic 2020 GMC Sierra 1500 SLTQuicksilver Metallic 2020 GMC Sierra 1500 SLTQuicksilver Metallic 2020 GMC Sierra 1500 SLTQuicksilver Metallic 2020 GMC Sierra 1500 SLTQuicksilver Metallic 2020 GMC Sierra 1500 SLT

    $34,999

    86,721 mi.
    Est. $658/mo

    Toyota West Ohio

    4.6
    Check Availability
    Columbus, OH (272 mi)
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  • Onyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLT

    $40,759

    $520
    30,289 mi.
    Est. $766/mo

    Hennessy Porsche

    4.9
    Check Availability
    Roswell, GA (571 mi)
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GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 SLT 50 Great deals
2025 GMC Sierra 1500 SLT $45,124 544 Great deals
2024 GMC Sierra 1500 SLT $45,715 157 Great deals
2023 GMC Sierra 1500 SLT $44,283 75 Great deals
2022 GMC Sierra 1500 SLT $40,864 55 Great deals
2021 GMC Sierra 1500 SLT $35,586 93 Great deals
2019 GMC Sierra 1500 SLT $32,481 18 Great deals
2018 GMC Sierra 1500 SLT $27,811 79 Great deals
2017 GMC Sierra 1500 SLT $25,040 41 Great deals

About the 2020 GMC Sierra 1500 SLT

Basics

SLT 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 SLT
FAQs

How much does the 2020 GMC Sierra 1500 SLT cost?

The 2020 GMC Sierra 1500 SLT price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 1500 SLT is $33,636, with pricing starting at $19,777.

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

The 2020 GMC Sierra 1500 SLT 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.

What are some similar vehicles and competitors of the 2020 GMC Sierra 1500 SLT?

The 2020 GMC Sierra 1500 SLT compares to and/or competes against the following vehicles:


Is the 2020 GMC Sierra 1500 SLT 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

SLT (6 styles)

Style
4WD Crew Cab 147" SLT 2WD Crew Cab 147" SLT 4WD Crew Cab 157" SLT 4WD Double Cab 147" SLT 2WD Double Cab 147" SLT 2WD Crew Cab 157" SLT
Inventory price
Starting at $50,400 Starting at $46,900 Starting at $50,700 Starting at $48,000 Starting at $44,500 Starting at $47,200
Combined MPG
18 19 18 18 19 19
Engine
420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 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) 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel)
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2020 GMC Sierra 1500 SLT by popular city

GMC Sierra 1500 trims