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 Filters
  • 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

    $31,975

    87,899 mi.
    Est. $601/mo

    Circle Buick GMC

    3.6
    Check Availability
    Highland, IN (26 mi)

    Quick view
  • 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

    $34,891

    62,403 mi.
    Est. $656/mo

    Kunes Apple Valley Buick GMC

    Check Availability
    Apple Valley, MN (343 mi)

    Quick view
  • 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

    $36,453

    61,116 mi.
    Est. $685/mo

    Carvibe Houston

    Check Availability
    Houston, TX (949 mi)
    Quick view
  • 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

    $34,811

    71,140 mi.
    Est. $654/mo

    Bayway Lincoln

    4.8
    Check Availability
    Houston, TX (947 mi)
    Quick view
  • 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

    $36,612

    $373
    71,947 mi.
    Est. $688/mo

    Group 1 Mazda Denton

    4.7
    Check Availability
    Denton, TX (793 mi)
    Quick view
  • 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

    $31,500

    87,761 mi.
    Est. $592/mo

    Crown Buick GMC

    4.7
    Check Availability
    Metairie, LA (834 mi)
    Quick view
  • 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

    $35,216

    88,958 mi.
    Est. $662/mo

    Gay Family Auto

    4.8
    Check Availability
    Dickinson, TX (954 mi)
    Quick view
  • 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

    $30,699

    $200
    108,383 mi.
    Est. $577/mo

    Walt Massey Chevrolet GMC Lucedale

    4.8
    Check Availability
    Lucedale, MS (759 mi)

    Quick view
  • 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

    $33,999

    81,638 mi.
    Est. $639/mo

    Rydell Chevrolet GMC of Grand Forks

    4.6
    Check Availability
    Grand Forks, ND (620 mi)
    Quick view
  • 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

    $33,391

    $381
    84,464 mi.
    Est. $628/mo

    Honda of Lake City

    4.1
    Check Availability
    Lake City, FL (854 mi)
    Quick view
  • White 2021 GMC Sierra 1500 SLTWhite 2021 GMC Sierra 1500 SLTWhite 2021 GMC Sierra 1500 SLTWhite 2021 GMC Sierra 1500 SLTWhite 2021 GMC Sierra 1500 SLTWhite 2021 GMC Sierra 1500 SLT

    $34,988

    103,379 mi.
    Est. $658/mo

    The Sharpest Rides

    4.4
    Check Availability
    Englewood, CO (920 mi)
    Quick view
  • 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

    $37,998

    62,358 mi.
    Est. $714/mo

    Panama City Toyota

    4.7
    Check Availability
    Panama City, FL (817 mi)
    Quick view
  • 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

    $41,258

    39,435 mi.
    Est. $776/mo

    Van Horn Chevrolet of Plymouth

    4.4
    Check Availability
    Plymouth, WI (130 mi)
    Quick view
  • 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

    $29,726

    $251
    138,503 mi.
    Est. $559/mo

    Covert Buick GMC Bee Cave

    4.6
    Check Availability
    Austin, TX (986 mi)

    Quick view
  • 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
    Check Availability
    Hyannis, MA (894 mi)
    Quick view
  • 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

    $33,995

    97,076 mi.
    Est. $639/mo

    Colonial Chevrolet

    4.7
    Check Availability
    Acton, MA (831 mi)
    Quick view
  • 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

    $43,360

    54,750 mi.
    Est. $815/mo

    AutoNation Ford Panama City

    4.6
    Check Availability
    Panama City, FL (817 mi)
    Quick view
  • 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

    $34,359

    134,057 mi.
    Est. $646/mo

    Bill Currie Ford

    4.3
    Check Availability
    Tampa, FL (1,002 mi)
    Quick view
  • 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

    $37,596

    45,272 mi.
    Est. $707/mo

    Volkswagen Brandon

    4.7
    Check Availability
    Tampa, FL (1,008 mi)
    Quick view
  • Onyx Black 2021 GMC Sierra 1500 SLTOnyx Black 2021 GMC Sierra 1500 SLT

    $32,650

    108,250 mi.
    Est. $614/mo

    Southern Buick GMC Greenbrier

    4.0
    Check Availability
    Chesapeake, VA (703 mi)

    Quick view
  • 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
    Check Availability
    Valdese, NC (537 mi)
    Quick view
  • 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

    $35,990

    80,370 mi.
    Est. $676/mo

    Med Center Mazda

    4.7
    Check Availability
    Pelham, AL (592 mi)
    Quick view
  • 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

    $36,605

    77,810 mi.
    Est. $688/mo

    Mark McLarty Toyota

    4.2
    Check Availability
    North Little Rock, AR (549 mi)
    Quick view
  • 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

    $36,498

    $206
    71,424 mi.
    Est. $686/mo

    AutoNation Ford Littleton

    4.4
    Check Availability
    Littleton, CO (921 mi)
    Quick view
  • 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 SLT

    $33,256

    78,138 mi.
    Est. $625/mo

    Vandergriff Chevrolet

    4.1
    Check Availability
    Arlington, TX (822 mi)
    Quick view
  • 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

    $26,490

    $500
    126,645 mi.
    Est. $498/mo

    Bomnin Chevrolet Dadeland

    4.8
    Check Availability
    Miami, FL (1,195 mi)

    Quick view
  • 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

    $36,891

    $1K
    60,955 mi.
    Est. $693/mo

    Rhinelander Auto Group

    4.8
    Check Availability
    RHINELANDER, WI (276 mi)
    Quick view
  • 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

    $37,485

    65,059 mi.
    Est. $705/mo

    Folsom Lake Ford

    4.8
    Check Availability
    Folsom, CA (1,773 mi)
    Quick view

GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 SLT 48 Great deals
2025 GMC Sierra 1500 SLT $45,168 527 Great deals
2024 GMC Sierra 1500 SLT $45,834 151 Great deals
2023 GMC Sierra 1500 SLT $44,322 64 Great deals
2022 GMC Sierra 1500 SLT $40,796 56 Great deals
2020 GMC Sierra 1500 SLT $33,780 59 Great deals
2019 GMC Sierra 1500 SLT $32,615 17 Great deals
2018 GMC Sierra 1500 SLT $27,947 65 Great deals
2017 GMC Sierra 1500 SLT $25,071 40 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 $35,608, with pricing starting at $15,677.

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)
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

2021 GMC Sierra 1500 SLT by popular city

GMC Sierra 1500 trims