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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

    $30,255

    97,584 mi.
    Est. $569/mo

    Ross Downing GMC Cadillac

    4.8
    Check Availability
    Hammond, LA (804 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

    $31,224

    184,689 mi.
    Est. $587/mo

    AutoNation Chevrolet Amarillo

    4.7
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    Amarillo, TX (894 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

    $33,789

    97,077 mi.
    Est. $635/mo

    Phil Long Hyundai of Motor City

    4.5
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    Colorado Springs, CO (929 mi)
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  • Pacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLT

    $27,000

    150,191 mi.
    Est. $508/mo

    Kirksville Motor Company

    4.9
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    Kirksville, MO (282 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

    $38,796

    63,174 mi.
    Est. $729/mo

    Luther Brookdale Chevrolet

    4.5
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    BROOKLYN CENTER, MN (361 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

    $32,993

    87,692 mi.
    Est. $620/mo

    Delray Buick GMC

    4.8
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    Delray Beach, FL (1,151 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

    100,048 mi.
    Est. $586/mo

    Brandon Hyundai

    4.4
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    Tampa, FL (1,008 mi)
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  • Pacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLT

    $39,200

    70,000 mi.
    Est. $737/mo

    Southern Chrysler Dodge Jeep Ram Greenbrier

    4.3
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    Chesapeake, VA (703 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

    $36,172

    $193
    66,032 mi.
    Est. $680/mo

    Winchester Mitsubishi

    4.3
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    Winchester, VA (532 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

    $27,772

    $578
    110,123 mi.
    Est. $522/mo

    Planet Ford 59

    4.4
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    Humble, TX (925 mi)
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  • Steel Metallic 2020 GMC Sierra 1500 SLTSteel Metallic 2020 GMC Sierra 1500 SLTSteel Metallic 2020 GMC Sierra 1500 SLTSteel Metallic 2020 GMC Sierra 1500 SLTSteel Metallic 2020 GMC Sierra 1500 SLTSteel Metallic 2020 GMC Sierra 1500 SLT

    $42,999

    39,045 mi.
    Est. $808/mo

    Rairdon's Chrysler Dodge Jeep RAM of Kirkland

    4.2
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    Kirkland, WA (1,725 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

    $30,955

    $1.5K
    67,814 mi.
    Est. $582/mo

    Wilde Toyota

    4.6
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    West Allis, WI (80 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

    $34,995

    102,312 mi.
    Est. $658/mo

    Bristol Auto Mall

    4.9
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    Levittown, PA (678 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

    $31,900

    $1.9K
    103,333 mi.
    Est. $600/mo

    Legacy Westbank Buick GMC

    4.5
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    Harvey, LA (841 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

    $37,874

    81,654 mi.
    Est. $712/mo

    Olathe Dodge Chrysler Jeep RAM

    4.1
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    Olathe, KS (428 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

    $35,767

    $351
    56,941 mi.
    Est. $672/mo

    Volkswagen of North Tampa

    4.5
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    Tampa, FL (999 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

    $30,988

    107,899 mi.
    Est. $582/mo

    Heuberger Subaru

    4.5
    Check Availability
    Colorado Springs, CO (929 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

    $28,477

    95,825 mi.
    Est. $535/mo

    Evans Toyota

    4.5
    Check Availability
    Fort Wayne, IN (140 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

    $33,500

    $339
    114,209 mi.
    Est. $630/mo

    City Limits Nissan

    4.6
    Check Availability
    Austin, TX (984 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

    $35,097

    $700
    88,068 mi.
    Est. $660/mo

    Bob Howard Chrysler Dodge Jeep RAM

    4.6
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    Oklahoma City, OK (686 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

    $35,429

    $1.5K
    78,851 mi.
    Est. $666/mo

    Cape Coral Chrysler Dodge Jeep Ram

    4.2
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    Cape Coral, FL (1,100 mi)
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  • White Frost Tri-Coat 2020 GMC Sierra 1500 SLTWhite Frost Tri-Coat 2020 GMC Sierra 1500 SLTWhite Frost Tri-Coat 2020 GMC Sierra 1500 SLTWhite Frost Tri-Coat 2020 GMC Sierra 1500 SLTWhite Frost Tri-Coat 2020 GMC Sierra 1500 SLTWhite Frost Tri-Coat 2020 GMC Sierra 1500 SLT

    $25,995

    $1K
    133,011 mi.
    Est. $489/mo

    Group 1 Acura Southwest Houston

    4.9
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    Houston, TX (953 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

    $33,915

    76,472 mi.
    Est. $637/mo

    Suntrup Kia South

    4.8
    Check Availability
    St. Louis, MO (273 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

    $31,995

    $1K
    88,647 mi.
    Est. $601/mo

    Lexus of Jacksonville

    4.8
    Check Availability
    Jacksonville, FL (868 mi)
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GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 SLT 54 Great deals
2025 GMC Sierra 1500 SLT $45,270 550 Great deals
2024 GMC Sierra 1500 SLT $45,878 161 Great deals
2023 GMC Sierra 1500 SLT $44,348 70 Great deals
2022 GMC Sierra 1500 SLT $40,731 53 Great deals
2021 GMC Sierra 1500 SLT $35,747 98 Great deals
2019 GMC Sierra 1500 SLT $32,626 18 Great deals
2018 GMC Sierra 1500 SLT $27,943 66 Great deals
2017 GMC Sierra 1500 SLT $25,138 44 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 $33,707, with pricing starting at $19,950.

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