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
  • 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

    $38,950

    73,982 mi.
    Est. $732/mo

    Bill Smith Buick GMC

    4.8
    Check Availability
    Cullman, AL (533 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

    $36,299

    $400
    67,638 mi.
    Est. $682/mo

    Florida Fine Cars Orlando

    4.8
    Check Availability
    Orlando, FL (990 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

    $36,612

    92,215 mi.
    Est. $688/mo

    Group 1 Buick GMC South

    4.6
    Check Availability
    Houston, TX (948 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

    $28,381

    116,055 mi.
    Est. $533/mo

    AutoNation Ford Mobile

    4.0
    Check Availability
    Mobile, AL (775 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

    $40,970

    $760
    34,276 mi.
    Est. $770/mo

    Valencia BMW

    4.5
    Check Availability
    Valencia, CA (1,747 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

    $32,624

    $641
    137,095 mi.
    Est. $613/mo

    Group 1 Toyota Rivertown

    4.3
    Check Availability
    Columbus, GA (662 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

    $40,671

    48,169 mi.
    Est. $764/mo

    Gettel Chevrolet Buick GMC of Charlotte County

    4.4
    Check Availability
    Punta Gorda, FL (1,082 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

    $30,690

    $1.2K
    94,765 mi.
    Est. $577/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

    $30,975

    $820
    134,057 mi.
    Est. $582/mo

    Bill Currie Ford

    4.3
    Check Availability
    Tampa, FL (1,002 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

    $29,688

    $112
    84,562 mi.
    Est. $558/mo

    McKinney Buick GMC

    4.1
    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

    $30,981

    $1.7K
    103,198 mi.
    Est. $582/mo

    Courtesy Buick GMC

    4.9
    Check Availability
    Louisville, KY (276 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
  • 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

    $31,614

    114,168 mi.
    Est. $594/mo

    McLarty Nissan of North Little Rock

    4.9
    Check Availability
    North Little Rock, AR (548 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
  • 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

    $35,380

    97,141 mi.
    Est. $665/mo

    Toyota of Greensboro

    4.4
    Check Availability
    Greensboro, NC (579 mi)
    Quick view
  • 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

    $45,000

    36,361 mi.
    Est. $846/mo

    Beaver Toyota Cumming

    4.7
    Check Availability
    Cumming, GA (567 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

    $41,178

    58,429 mi.
    Est. $774/mo

    Pat McGrath Chevyland

    4.4
    Check Availability
    Cedar Rapids, IA (208 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

    $33,080

    84,464 mi.
    Est. $622/mo

    Honda of Lake City

    4.1
    Check Availability
    Lake City, FL (854 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

    $39,360

    59,346 mi.
    Est. $740/mo

    Morong Falmouth Mazda

    4.8
    Check Availability
    Falmouth, ME (890 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

    4.6
    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

    $35,718

    71,947 mi.
    Est. $671/mo

    Group 1 Mazda Denton

    4.7
    Check Availability
    Denton, 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

    $45,985

    $500
    48,567 mi.
    Est. $864/mo

    Earth MotorCars / Lotus of Dallas

    4.7
    Check Availability
    Carrollton, TX (796 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

    $37,494

    45,272 mi.
    Est. $705/mo

    Volkswagen Brandon

    4.7
    Check Availability
    Tampa, FL (1,008 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

    $45,980

    39,649 mi.
    Est. $864/mo

    Lithia Chrysler Jeep of Reno

    4.7
    Check Availability
    Reno, NV (1,683 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

    $36,998

    62,358 mi.
    Est. $695/mo

    Panama City Toyota

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

    $31,927

    $353
    95,169 mi.
    Est. $600/mo

    Al Serra Auto Plaza

    4.5
    Check Availability
    Grand Blanc Charter Township, MI (217 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

    $30,395

    97,389 mi.
    Est. $571/mo

    DriveTime of Gwinnett

    4.8
    Check Availability
    Duluth, GA (580 mi)
    Quick view
  • Gray 2021 GMC Sierra 1500 SLTGray 2021 GMC Sierra 1500 SLTGray 2021 GMC Sierra 1500 SLTGray 2021 GMC Sierra 1500 SLTGray 2021 GMC Sierra 1500 SLTGray 2021 GMC Sierra 1500 SLT

    $38,455

    43,090 mi.
    Est. $723/mo

    Bud Clary Subaru

    4.7
    Check Availability
    Longview, WA (1,764 mi)
    Quick view
  • 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

    $39,995

    57,522 mi.
    Est. $752/mo

    Billion Auto - Buick GMC

    4.4
    Check Availability
    Sioux Falls, SD (476 mi)
    Quick view

GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 SLT 65 Great deals
2025 GMC Sierra 1500 SLT $45,547 174 Great deals
2024 GMC Sierra 1500 SLT $46,074 146 Great deals
2023 GMC Sierra 1500 SLT $44,601 113 Great deals
2022 GMC Sierra 1500 SLT $40,640 109 Great deals
2020 GMC Sierra 1500 SLT $33,824 82 Great deals
2019 GMC Sierra 1500 SLT $32,854 63 Great deals
2018 GMC Sierra 1500 SLT $28,132 114 Great deals
2017 GMC Sierra 1500 SLT $25,074 62 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 $35,881, with pricing starting at $19,997.

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