Skip to main content
Best match Lowest price Highest price Lowest mileage Highest mileage Nearest location Best deal Newest year Oldest year Newest listed Oldest listed
Skip to Listings
Best match Lowest price Highest price Lowest mileage Highest mileage Nearest location Best deal Newest year Oldest year Newest listed Oldest listed
Skip to Filters
  • 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

    $29,339

    96,613 mi.
    Est. $553/mo

    Covert Buick GMC Bee Cave

    4.6
    Austin, TX (986 mi)
    Check Availability

  • 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

    $34,218

    $1K
    58,461 mi.
    Est. $645/mo

    Vernon Auto Group

    4.8
    Vernon, TX (829 mi)
    Check Availability

  • 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

    $29,339

    96,613 mi.
    Est. $553/mo

    Covert Buick GMC Bee Cave

    4.6
    Austin, TX (986 mi)
    Check Availability

  • 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

    $29,224

    119,701 mi.
    Est. $551/mo

    Audi Peabody

    4.9
    Peabody, MA (854 mi)
    Check Availability
  • 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

    $40,177

    $680
    32,598 mi.
    Est. $757/mo

    Parks GMC Kernersville

    4.1
    Kernersville, NC (568 mi)
    Check Availability
  • 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

    $34,974

    70,249 mi.
    Est. $659/mo

    Bourne's Auto Center

    4.9
    Easton, MA (850 mi)
    Check Availability
  • 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

    $37,982

    61,398 mi.
    Est. $716/mo

    Fort Wayne Toyota

    4.5
    Fort Wayne, IN (137 mi)
    Check Availability
  • 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

    $30,716

    $2.2K
    65,234 mi.
    Est. $579/mo

    Hiley Hyundai of Fort Worth

    4.9
    Fort Worth, TX (831 mi)
    Check Availability
  • Cayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLT

    $32,689

    $3.2K
    60,727 mi.
    Est. $616/mo

    Rob Lambdin's University Dodge RAM

    3.8
    Davie, FL (1,172 mi)
    Check Availability

  • 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

    $35,760

    $1.2K
    50,611 mi.
    Est. $674/mo

    Longo Toyota

    4.8
    El Monte, CA (1,731 mi)
    Check Availability
  • 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

    $37,303

    $1.3K
    66,425 mi.
    Est. $703/mo

    Kelley Chevrolet

    4.6
    Fort Wayne, IN (139 mi)
    Check Availability
  • Cayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLT

    $34,997

    $490
    52,670 mi.
    Est. $659/mo

    EchoPark Automotive Thornton

    4.8
    Thornton, CO (915 mi)
    Check Availability
  • 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

    $33,058

    $205
    80,466 mi.
    Est. $623/mo

    Bob Sight Kia

    4.6
    Independence, MO (406 mi)
    Check Availability
  • 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

    $32,993

    $853
    70,159 mi.
    Est. $622/mo

    Karl Flammer Ford

    4.8
    Tarpon Springs, FL (988 mi)
    Check Availability
  • 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

    $29,444

    110,959 mi.
    Est. $555/mo

    Rob Lambdin's University Dodge RAM

    3.8
    Davie, FL (1,172 mi)
    Check Availability

  • 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

    $30,117

    $140
    117,884 mi.
    Est. $567/mo

    Andy Mohr Chrysler Dodge Jeep RAM

    4.4
    Indianapolis, IN (154 mi)
    Check Availability
  • 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

    $27,453

    $771
    95,170 mi.
    Est. $517/mo

    Grand Prairie Ford

    4.6
    Grand Prairie, TX (813 mi)
    Check Availability
  • 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

    $38,550

    $490
    28,925 mi.
    Est. $726/mo

    #1 Cochran Ford Monroeville

    4.7
    Monroeville, PA (421 mi)
    Check Availability
  • 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

    $37,213

    74,318 mi.
    Est. $701/mo

    Nexcar

    4.0
    Spring, TX (925 mi)
    Check Availability
  • 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

    $37,539

    54,840 mi.
    Est. $707/mo

    CarShop Chester Springs

    4.8
    Chester Springs, PA (636 mi)
    Check Availability
  • Cayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLT

    $39,354

    71,206 mi.
    Est. $741/mo

    Jenkins Chevrolet of Venice

    4.3
    Venice, FL (1,067 mi)
    Check Availability

  • 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

    $42,892

    53,149 mi.
    Est. $808/mo

    Toyota of Cleveland

    4.8
    McDonald, TN (487 mi)
    Check Availability
  • 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

    $36,961

    $559
    49,134 mi.
    Est. $696/mo

    AutoNation Chevrolet North Corpus Christi

    4.5
    Corpus Christi, TX (1,123 mi)
    Check Availability
  • Cayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLT

    $33,622

    74,243 mi.
    Est. $633/mo

    Group 1 Hyundai Hub City

    4.4
    Lubbock, TX (969 mi)
    Check Availability
  • 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

    $27,846

    $500
    121,053 mi.
    Est. $525/mo

    Luther Brookdale Chevrolet

    4.5
    BROOKLYN CENTER, MN (361 mi)
    Check Availability
  • 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

    $36,494

    82,536 mi.
    Est. $688/mo

    Bachman Chevrolet

    4.3
    Louisville, KY (276 mi)
    Check Availability
  • Cayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLTCayenne Red Tintcoat 2021 GMC Sierra 1500 SLT

    $23,377

    161,042 mi.
    Est. $440/mo

    Pedder Chrysler Dodge Ram + Jeep

    4.2
    Poway, CA (1,717 mi)
    Check Availability

  • 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

    $35,695

    71,686 mi.
    Est. $672/mo

    Toyota of Katy

    4.9
    Katy, TX (951 mi)
    Check Availability
  • Ebony Twilight Metallic 2021 GMC Sierra 1500 SLTEbony Twilight Metallic 2021 GMC Sierra 1500 SLTEbony Twilight Metallic 2021 GMC Sierra 1500 SLTEbony Twilight Metallic 2021 GMC Sierra 1500 SLTEbony Twilight Metallic 2021 GMC Sierra 1500 SLTEbony Twilight Metallic 2021 GMC Sierra 1500 SLT

    $28,302

    $1.2K
    112,960 mi.
    Est. $533/mo

    Napleton's Auto Park Of Urbana

    4.2
    Urbana, IL (124 mi)
    Check Availability
  • 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

    $29,917

    109,350 mi.
    Est. $564/mo

    Mercedes-Benz of North Orlando

    4.3
    Sanford, FL (971 mi)
    Check Availability
  • 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

    $36,552

    94,447 mi.
    Est. $689/mo

    Hardy Superstore

    4.8
    Dallas, GA (572 mi)
    Check Availability

GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 SLT 218 Great deals
2025 GMC Sierra 1500 SLT $41,469 460 Great deals
2024 GMC Sierra 1500 SLT $43,617 209 Great deals
2023 GMC Sierra 1500 SLT $41,739 186 Great deals
2022 GMC Sierra 1500 SLT $38,026 136 Great deals
2020 GMC Sierra 1500 SLT $32,631 111 Great deals
2019 GMC Sierra 1500 SLT $31,005 62 Great deals
2018 GMC Sierra 1500 SLT $26,922 120 Great deals
2017 GMC Sierra 1500 SLT $23,911 57 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 $33,801, with pricing starting at $19,936.

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)

2021 GMC Sierra 1500 trims