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
  • 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

    $34,999

    83,968 mi.
    Est. $658/mo

    AutoNation USA Denver 104

    3.8
    Check Availability
    Northglenn, CO (916 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

    $36,598

    $500
    96,776 mi.
    Est. $688/mo

    Marianna Chevrolet GMC

    4.6
    Check Availability
    Marianna, FL (779 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

    $36,991

    $600
    45,272 mi.
    Est. $695/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 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

    $38,699

    $300
    38,123 mi.
    Est. $727/mo

    Dick Scott Motor Mall

    4.7
    Check Availability
    Fowlerville, MI (190 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

    $39,999

    $2K
    45,632 mi.
    Est. $752/mo

    Planet Ford 45

    4.5
    Check Availability
    Spring, TX (925 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

    $40,777

    $714
    33,704 mi.
    Est. $766/mo

    Hardin Buick GMC

    4.6
    Check Availability
    Anaheim, CA (1,731 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

    $31,290

    127,087 mi.
    Est. $588/mo

    Brandon Tomes Subaru

    4.8
    Check Availability
    McKinney, TX (779 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

    $30,898

    $900
    104,418 mi.
    Est. $581/mo

    Marianna Chevrolet GMC

    4.6
    Check Availability
    Marianna, FL (779 mi)

    Quick view
  • 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

    $39,990

    50,056 mi.
    Est. $752/mo

    McDonald Toyota Greeley

    4.4
    Check Availability
    Greeley, CO (896 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

    $35,984

    90,409 mi.
    Est. $676/mo

    DallasLeaseReturns.com

    5.0
    Check Availability
    Dallas, TX (797 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

    $41,980

    60,260 mi.
    Est. $789/mo

    Lithia Chrysler Jeep of Reno

    4.7
    Check Availability
    Reno, NV (1,683 mi)
    Quick view
  • 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

    $36,392

    $603
    74,851 mi.
    Est. $684/mo

    McLarty Daniel Ford

    4.8
    Check Availability
    Bentonville, AR (520 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

    $38,786

    57,690 mi.
    Est. $729/mo

    AutoNation Chevrolet Mesa

    4.7
    Check Availability
    Mesa, AZ (1,435 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

    $29,608

    $450
    95,082 mi.
    Est. $557/mo

    Van Chevrolet

    4.6
    Check Availability
    Scottsdale, AZ (1,437 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

    $29,991

    111,898 mi.
    Est. $564/mo

    Audi Plano

    4.8
    Check Availability
    Plano, TX (793 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

    $42,848

    $1.5K
    48,567 mi.
    Est. $805/mo

    Earth MotorCars / Lotus of Dallas

    4.7
    Check Availability
    Carrollton, TX (796 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

    $39,744

    $951
    59,346 mi.
    Est. $747/mo

    Morong Falmouth Mazda

    4.8
    Check Availability
    Falmouth, ME (890 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

    $36,820

    59,123 mi.
    Est. $692/mo

    Basil Toyota

    4.6
    Check Availability
    Lockport, NY (464 mi)
    Quick view
  • 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

    $37,187

    76,435 mi.
    Est. $699/mo

    Gettel Toyota of Lakewood

    4.5
    Check Availability
    Bradenton, FL (1,036 mi)
    Quick view
  • 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
    Check Availability
    Meridian, MS (661 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

    $33,408

    108,466 mi.
    Est. $628/mo

    Seminole Chevrolet

    4.4
    Check Availability
    Sanford, FL (971 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

    $35,106

    $437
    89,255 mi.
    Est. $660/mo

    Murray Ford Superstore

    4.8
    Check Availability
    Starke, FL (883 mi)
    Quick view
  • 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

    $36,822

    98,889 mi.
    Est. $692/mo

    Bill Hood Chevrolet

    4.7
    Check Availability
    Covington, LA (803 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

    $44,162

    34,315 mi.
    Est. $830/mo

    Group 1 Ford of El Paso

    4.9
    Check Availability
    El Paso, TX (1,245 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

    $30,489

    134,057 mi.
    Est. $573/mo

    Bill Currie Ford

    4.3
    Check Availability
    Tampa, FL (1,002 mi)
    Quick view
  • 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
    Check Availability
    Indianapolis, IN (160 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

    $41,279

    29,362 mi.
    Est. $776/mo

    Bobby Rahal Toyota

    4.8
    Check Availability
    Mechanicsburg, PA (563 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

    $26,888

    62,545 mi.
    Est. $505/mo

    Central Autohaus

    4.5
    Check Availability
    Dallas, TX (792 mi)
    Quick view
  • Black 2021 GMC Sierra 1500 SLTBlack 2021 GMC Sierra 1500 SLTBlack 2021 GMC Sierra 1500 SLTBlack 2021 GMC Sierra 1500 SLTBlack 2021 GMC Sierra 1500 SLTBlack 2021 GMC Sierra 1500 SLT

    $40,990

    $5K
    19,571 mi.
    Est. $770/mo

    Meadowland of Carmel

    4.2
    Check Availability
    Carmel, NY (722 mi)
    Quick view

GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 SLT 88 Great deals
2025 GMC Sierra 1500 SLT $46,095 198 Great deals
2024 GMC Sierra 1500 SLT $46,309 153 Great deals
2023 GMC Sierra 1500 SLT $44,322 135 Great deals
2022 GMC Sierra 1500 SLT $40,708 128 Great deals
2020 GMC Sierra 1500 SLT $33,957 113 Great deals
2019 GMC Sierra 1500 SLT $32,998 75 Great deals
2018 GMC Sierra 1500 SLT $28,071 111 Great deals
2017 GMC Sierra 1500 SLT $25,152 60 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 $35,794, with pricing starting at $19,996.

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