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  • Cardinal Red 2021 GMC Sierra 1500 4WD Crew Cab 147" SLTCardinal Red 2021 GMC Sierra 1500 4WD Crew Cab 147" SLTCardinal Red 2021 GMC Sierra 1500 4WD Crew Cab 147" SLTCardinal Red 2021 GMC Sierra 1500 4WD Crew Cab 147" SLTCardinal Red 2021 GMC Sierra 1500 4WD Crew Cab 147" SLTCardinal Red 2021 GMC Sierra 1500 4WD Crew Cab 147" SLT

    $29,400

    $2.9K
    124,266 mi.
    Est. $553/mo

    SVG Urbana

    4.7
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    Urbana, OH (239 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

    $35,400

    $300
    93,817 mi.
    Est. $665/mo

    Stan King Chevrolet

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    Brookhaven, MS (729 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

    $32,348

    $1K
    89,174 mi.
    Est. $608/mo

    Luther Kia of Inver Grove

    4.6
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    Inver Grove Heights, MN (343 mi)
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  • Cayenne Red 2021 GMC Sierra 1500 SLTCayenne Red 2021 GMC Sierra 1500 SLTCayenne Red 2021 GMC Sierra 1500 SLTCayenne Red 2021 GMC Sierra 1500 SLTCayenne Red 2021 GMC Sierra 1500 SLTCayenne Red 2021 GMC Sierra 1500 SLT

    $32,565

    95,169 mi.
    Est. $612/mo

    Al Serra Auto Plaza

    4.5
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    Grand Blanc Charter Township, MI (217 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

    $39,800

    27,859 mi.
    Est. $748/mo

    Legacy Westbank Buick GMC

    4.5
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    Harvey, LA (841 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

    $28,839

    117,273 mi.
    Est. $542/mo

    Russ Darrow Toyota

    4.6
    Check Availability
    West Bend, WI (111 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

    $29,981

    134,116 mi.
    Est. $564/mo

    Joyce Koons Honda Buick GMC

    4.6
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    Manassas, VA (574 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 SLTDark Sky Metallic 2021 GMC Sierra 1500 SLTDark Sky Metallic 2021 GMC Sierra 1500 SLT

    $33,888

    79,695 mi.
    Est. $637/mo

    Pearson Nissan of Ocala

    4.5
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    Ocala, FL (931 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

    $36,990

    $900
    75,451 mi.
    Est. $695/mo

    Paramount Ford

    4.9
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    Valdese, NC (537 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

    $43,495

    $1.3K
    54,750 mi.
    Est. $818/mo

    AutoNation Ford Panama City

    4.6
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    Panama City, FL (817 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

    $36,995

    $601
    45,272 mi.
    Est. $695/mo

    Volkswagen Brandon

    4.7
    Check Availability
    Tampa, FL (1,008 mi)
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  • Quicksilver Metallic 2021 GMC Sierra 1500 SLTQuicksilver Metallic 2021 GMC Sierra 1500 SLTQuicksilver Metallic 2021 GMC Sierra 1500 SLTQuicksilver Metallic 2021 GMC Sierra 1500 SLTQuicksilver Metallic 2021 GMC Sierra 1500 SLTQuicksilver Metallic 2021 GMC Sierra 1500 SLT

    $37,500

    $1K
    60,003 mi.
    Est. $705/mo

    Ferman Chrysler Jeep Dodge RAM of Wesley Chapel

    4.9
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    Lutz, FL (991 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

    $32,991

    $265
    78,153 mi.
    Est. $620/mo

    Vandergriff Chevrolet

    4.1
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    Arlington, TX (822 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 SLTDark Sky Metallic 2021 GMC Sierra 1500 SLTDark Sky Metallic 2021 GMC Sierra 1500 SLT

    $39,083

    41,731 mi.
    Est. $735/mo

    AutoNation Chrysler Dodge Jeep Ram Valencia

    4.2
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    Santa Clarita, CA (1,747 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

    $35,414

    $595
    101,059 mi.
    Est. $666/mo

    Copeland Chevrolet Hyannis

    4.5
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    Hyannis, MA (894 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

    $37,220

    71,224 mi.
    Est. $700/mo

    AutoNation Honda Lewisville

    4.7
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    Lewisville, TX (798 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

    $34,995

    101,823 mi.
    Est. $658/mo

    Midway Chevrolet

    4.7
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    Phoenix, AZ (1,447 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

    $35,493

    $1.1K
    71,947 mi.
    Est. $667/mo

    Group 1 Mazda Denton

    4.7
    Check Availability
    Denton, TX (793 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

    $36,998

    $1K
    62,358 mi.
    Est. $695/mo

    Panama City Toyota

    4.7
    Check Availability
    Panama City, FL (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

    $30,990

    93,667 mi.
    Est. $582/mo

    Sam Galloway Ford

    4.7
    Check Availability
    Fort Myers, FL (1,107 mi)
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  • Brownstone Metallic 2021 GMC Sierra 1500 SLTBrownstone Metallic 2021 GMC Sierra 1500 SLTBrownstone Metallic 2021 GMC Sierra 1500 SLTBrownstone Metallic 2021 GMC Sierra 1500 SLTBrownstone Metallic 2021 GMC Sierra 1500 SLTBrownstone Metallic 2021 GMC Sierra 1500 SLT

    $39,195

    56,820 mi.
    Est. $737/mo

    Toyota of Katy

    4.9
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    Katy, TX (951 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

    $36,491

    $2.3K
    78,419 mi.
    Est. $686/mo

    Regal Chevrolet Kia Lakeland

    4.5
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    Lakeland, FL (1,010 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

    $41,495

    $3.5K
    21,943 mi.
    Est. $780/mo

    Val Ward Cadillac

    4.8
    Check Availability
    Fort Myers, FL (1,109 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

    $34,295

    $500
    43,990 mi.
    Est. $645/mo

    Zeigler Honda of Racine

    4.6
    Check Availability
    Mt Pleasant, WI (60 mi)
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GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 SLT 56 Great deals
2025 GMC Sierra 1500 SLT $45,237 539 Great deals
2024 GMC Sierra 1500 SLT $45,925 167 Great deals
2023 GMC Sierra 1500 SLT $44,373 64 Great deals
2022 GMC Sierra 1500 SLT $40,793 51 Great deals
2020 GMC Sierra 1500 SLT $33,779 62 Great deals
2019 GMC Sierra 1500 SLT $32,634 21 Great deals
2018 GMC Sierra 1500 SLT $28,059 58 Great deals
2017 GMC Sierra 1500 SLT $24,901 41 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 $35,901, with pricing starting at $19,999.

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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GMC Sierra 1500 trims