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  • Satin Steel Metallic 2021 GMC Sierra 1500 SLTSatin Steel Metallic 2021 GMC Sierra 1500 SLTSatin Steel Metallic 2021 GMC Sierra 1500 SLTSatin Steel Metallic 2021 GMC Sierra 1500 SLTSatin Steel Metallic 2021 GMC Sierra 1500 SLTSatin Steel Metallic 2021 GMC Sierra 1500 SLT

    $33,783

    71,879 mi.
    Est. $635/mo

    Clay Cooley Chevrolet of Dallas

    4.5
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    Dallas, TX (800 mi)

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  • Onyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLT

    $31,298

    $500
    104,418 mi.
    Est. $588/mo

    Marianna Chevrolet GMC

    4.6
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    Marianna, FL (779 mi)

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  • Onyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLT

    $38,999

    38,123 mi.
    Est. $733/mo

    Dick Scott Motor Mall

    4.8
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    Fowlerville, MI (190 mi)
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  • Sky 2021 GMC Sierra 1500 SLTSky 2021 GMC Sierra 1500 SLTSky 2021 GMC Sierra 1500 SLTSky 2021 GMC Sierra 1500 SLTSky 2021 GMC Sierra 1500 SLTSky 2021 GMC Sierra 1500 SLT

    $37,591

    $400
    45,272 mi.
    Est. $707/mo

    Volkswagen Brandon

    4.7
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    Tampa, FL (1,008 mi)
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  • White Frost Tricoat 2021 GMC Sierra 1500 SLTWhite Frost Tricoat 2021 GMC Sierra 1500 SLTWhite Frost Tricoat 2021 GMC Sierra 1500 SLTWhite Frost Tricoat 2021 GMC Sierra 1500 SLTWhite Frost Tricoat 2021 GMC Sierra 1500 SLTWhite Frost Tricoat 2021 GMC Sierra 1500 SLT

    $32,400

    $500
    68,464 mi.
    Est. $609/mo

    Loehmann-Blasius Chevrolet

    4.0
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    Waterbury, CT (755 mi)
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  • Onyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLT

    $40,999

    $1K
    45,632 mi.
    Est. $771/mo

    Planet Ford 45

    4.5
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    Spring, TX (925 mi)
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  • Summit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLT

    $32,490

    92,836 mi.
    Est. $611/mo

    Porter Chevrolet

    4.7
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    Newark, DE (641 mi)
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  • White Frost Tri-Coat 2021 GMC Sierra 1500 SLTWhite Frost Tri-Coat 2021 GMC Sierra 1500 SLTWhite Frost Tri-Coat 2021 GMC Sierra 1500 SLTWhite Frost Tri-Coat 2021 GMC Sierra 1500 SLTWhite Frost Tri-Coat 2021 GMC Sierra 1500 SLTWhite Frost Tri-Coat 2021 GMC Sierra 1500 SLT

    $36,418

    91,234 mi.
    Est. $685/mo

    Chevrolet of Meridian

    4.5
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    Meridian, MS (661 mi)

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  • White Frost Tricoat 2021 GMC Sierra 1500 SLTWhite Frost Tricoat 2021 GMC Sierra 1500 SLTWhite Frost Tricoat 2021 GMC Sierra 1500 SLTWhite Frost Tricoat 2021 GMC Sierra 1500 SLTWhite Frost Tricoat 2021 GMC Sierra 1500 SLTWhite Frost Tricoat 2021 GMC Sierra 1500 SLT

    $41,570

    $420
    30,060 mi.
    Est. $781/mo

    Allen Chevrolet Cadillac

    4.0
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    Monroe, MI (218 mi)
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  • Summit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLT

    $32,294

    $696
    98,744 mi.
    Est. $607/mo

    Feldman Chevrolet of Livonia

    4.7
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    Livonia, MI (222 mi)
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  • Onyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLT

    $36,820

    59,115 mi.
    Est. $692/mo

    Basil Toyota

    4.6
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    Lockport, NY (464 mi)
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  • White Frost Tricoat 2021 GMC Sierra 1500 SLTWhite Frost Tricoat 2021 GMC Sierra 1500 SLTWhite Frost Tricoat 2021 GMC Sierra 1500 SLTWhite Frost Tricoat 2021 GMC Sierra 1500 SLTWhite Frost Tricoat 2021 GMC Sierra 1500 SLTWhite Frost Tricoat 2021 GMC Sierra 1500 SLT

    $39,084

    60,806 mi.
    Est. $735/mo

    Roseville Toyota

    4.1
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    Roseville, CA (1,773 mi)
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  • Onyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLT

    $42,859

    29,231 mi.
    Est. $806/mo

    Interstate Ford

    4.7
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    Miamisburg, OH (236 mi)
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  • White Frost 2021 GMC Sierra 1500 SLTWhite Frost 2021 GMC Sierra 1500 SLTWhite Frost 2021 GMC Sierra 1500 SLTWhite Frost 2021 GMC Sierra 1500 SLTWhite Frost 2021 GMC Sierra 1500 SLTWhite Frost 2021 GMC Sierra 1500 SLT

    $36,450

    98,998 mi.
    Est. $685/mo

    Ray Skillman Mazda West

    5.0
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    Indianapolis, IN (160 mi)

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  • Summit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLT

    $35,000

    $1K
    58,295 mi.
    Est. $658/mo

    Five Star Ford

    4.9
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    North Richland Hills, TX (817 mi)
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  • Pacific Blue Metallic 2021 GMC Sierra 1500 SLTPacific Blue Metallic 2021 GMC Sierra 1500 SLTPacific Blue Metallic 2021 GMC Sierra 1500 SLTPacific Blue Metallic 2021 GMC Sierra 1500 SLTPacific Blue Metallic 2021 GMC Sierra 1500 SLTPacific Blue Metallic 2021 GMC Sierra 1500 SLT

    $31,290

    127,087 mi.
    Est. $588/mo

    Brandon Tomes Subaru

    4.8
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    McKinney, TX (779 mi)
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  • Summit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLTSummit White 2021 GMC Sierra 1500 SLT

    $39,364

    $587
    57,690 mi.
    Est. $740/mo

    AutoNation Chevrolet Mesa

    4.7
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    Mesa, AZ (1,435 mi)
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  • Pacific Blue Metallic 2021 GMC Sierra 1500 SLTPacific Blue Metallic 2021 GMC Sierra 1500 SLTPacific Blue Metallic 2021 GMC Sierra 1500 SLTPacific Blue Metallic 2021 GMC Sierra 1500 SLTPacific Blue Metallic 2021 GMC Sierra 1500 SLTPacific Blue Metallic 2021 GMC Sierra 1500 SLT

    $33,842

    79,014 mi.
    Est. $636/mo

    Planet Pre-Owned / Matthews Mitsubishi V

    4.6
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    Vestal, NY (597 mi)
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  • Satin Steel Metallic 2021 GMC Sierra 1500 SLTSatin Steel Metallic 2021 GMC Sierra 1500 SLTSatin Steel Metallic 2021 GMC Sierra 1500 SLTSatin Steel Metallic 2021 GMC Sierra 1500 SLTSatin Steel Metallic 2021 GMC Sierra 1500 SLTSatin Steel Metallic 2021 GMC Sierra 1500 SLT

    $43,031

    $1.3K
    48,567 mi.
    Est. $809/mo

    Earth MotorCars / Lotus of Dallas

    4.7
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    Carrollton, TX (796 mi)
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  • Onyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLT

    $37,098

    96,100 mi.
    Est. $697/mo

    Marianna Chevrolet GMC

    4.6
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    Marianna, FL (779 mi)

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  • Satin Steel Metallic 2021 GMC Sierra 1500 SLTSatin Steel Metallic 2021 GMC Sierra 1500 SLTSatin Steel Metallic 2021 GMC Sierra 1500 SLTSatin Steel Metallic 2021 GMC Sierra 1500 SLTSatin Steel Metallic 2021 GMC Sierra 1500 SLTSatin Steel Metallic 2021 GMC Sierra 1500 SLT

    $41,980

    $4K
    39,649 mi.
    Est. $789/mo

    Lithia Chrysler Jeep of Reno

    4.7
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    Reno, NV (1,683 mi)
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  • Steel Metallic 2021 GMC Sierra 1500 SLTSteel Metallic 2021 GMC Sierra 1500 SLTSteel Metallic 2021 GMC Sierra 1500 SLTSteel Metallic 2021 GMC Sierra 1500 SLTSteel Metallic 2021 GMC Sierra 1500 SLTSteel Metallic 2021 GMC Sierra 1500 SLT

    $37,038

    $346
    76,435 mi.
    Est. $696/mo

    Gettel Toyota of Lakewood

    4.5
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    Bradenton, FL (1,036 mi)
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  • Cardinal Red 2021 GMC Sierra 1500 SLTCardinal Red 2021 GMC Sierra 1500 SLTCardinal Red 2021 GMC Sierra 1500 SLTCardinal Red 2021 GMC Sierra 1500 SLTCardinal Red 2021 GMC Sierra 1500 SLTCardinal Red 2021 GMC Sierra 1500 SLT

    $33,793

    91,317 mi.
    Est. $635/mo

    J & M Automotive

    4.9
    Check Availability
    Naugatuck, CT (753 mi)
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  • Dark Sky Metallic 2021 GMC Sierra 1500 SLTDark Sky Metallic 2021 GMC Sierra 1500 SLTDark Sky Metallic 2021 GMC Sierra 1500 SLTDark Sky Metallic 2021 GMC Sierra 1500 SLT

    $38,490

    75,537 mi.
    Est. $723/mo

    BMW Northwest

    4.8
    Check Availability
    Fife, WA (1,735 mi)
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GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 SLT 76 Great deals
2025 GMC Sierra 1500 SLT $46,065 226 Great deals
2024 GMC Sierra 1500 SLT $46,317 147 Great deals
2023 GMC Sierra 1500 SLT $44,552 137 Great deals
2022 GMC Sierra 1500 SLT $40,757 122 Great deals
2020 GMC Sierra 1500 SLT $33,917 104 Great deals
2019 GMC Sierra 1500 SLT $33,058 72 Great deals
2018 GMC Sierra 1500 SLT $28,111 109 Great deals
2017 GMC Sierra 1500 SLT $25,032 63 Great deals

About the 2021 GMC Sierra 1500 SLT

Basics

SLT shown.

Seating
5
Door count
4
Drivetrain
Rear Wheel Drive
Combined MPG
17
Transmission
10-Speed A/T
Engine
355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel)
Side view of the 2021 GMC Sierra 1500 SLT
FAQs

How much does the 2021 GMC Sierra 1500 SLT cost?

The 2021 GMC Sierra 1500 SLT price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 1500 SLT is $36,027, with pricing starting at $22,995.

What is the MPG of the 2021 GMC Sierra 1500 SLT?

The 2021 GMC Sierra 1500 SLT offers up to 15 MPG in city driving and 22 MPG on the highway for a combined rating of 17 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 2021 GMC Sierra 1500 SLT?

The 2021 GMC Sierra 1500 SLT compares to and/or competes against the following vehicles:


Is the 2021 GMC Sierra 1500 SLT reliable?

The 2021 GMC Sierra 1500 has an average reliability rating of 3.5 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2021 Sierra 1500 owners.

Ratings (56 reviews)

60% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.2
Interior
4.2
Performance
3.8
Value
3.6
Exterior
4.3
Reliability
3.5
Trims

SLT (3 styles)

Style
4WD Crew Cab 147" SLT 2WD Crew Cab 147" SLT 4WD Crew Cab 157" SLT
Inventory price
Starting at $50,800 Starting at $47,500 Starting at $51,100
Combined MPG
18 17 18
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)
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2021 GMC Sierra 1500 SLT by popular city

GMC Sierra 1500 trims