CoPilot AI-Assisted Car Shopping

 New Search
 Save
 Sort
 Share

Used 2021 GMC Sierra 1500 for Sale in Saint Louis, MO

Sierra 1500s for Sale at Dealers

Filters
Price
Year
Mileage
Trim
2021 GMC Sierra 1500 Denali 4WD photo
2021 GMC Sierra 1500 Denali 4WD • St Peters, MO
White • 6.2L V8 Engine
$51,940 • 47.4k miles
•••

#96 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “D+” Buy

  • Includes $11,854 Premium Upgrades
  • Motivation to Negotiate - Increasing
  • Very Low Mileage
More details
2022 GMC Sierra 1500 SLT 4WD photo
Price Drop
2022 GMC Sierra 1500 SLT 4WD • Wood River, IL
White • 3.0L I6 Engine
$43,859 • 45.4k miles
•••

#83 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “C+” Buy

  • $500 Price Drop
  • Includes $4,994 Premium Upgrades
  • CARFAX: One Owner
More details
2022 GMC Sierra 1500 Denali 4WD photo
Price Drop
2022 GMC Sierra 1500 Denali 4WD • Anna, IL
Red • 3.0L I6 Engine
$46,700 • 41.3k miles
•••

#38 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “B+” Buy

  • $200 Price Drop
  • Fair Price - $1,261 Below Market
  • Includes $2,503 Premium Upgrades
More details
2022 GMC Sierra 1500 SLT 4WD photo
Price Drop
2022 GMC Sierra 1500 SLT 4WD • Wentzville, MO
6.2L V8 Engine
$43,495 • 29.8k miles
•••

#71 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “B” Buy

  • $990 Price Drop
  • Fair Price - $1,009 Above Market
  • Includes $1,834 Premium Upgrades
More details
2020 GMC Sierra 1500 Elevation 4WD photo
2020 GMC Sierra 1500 Elevation 4WD • Springfield, IL
Silver • 3.0L I6 Engine
$25,495 • 133.6k miles
•••

#43 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “B+” Buy

  • Good Price - $1,053 Below Market
  • Includes $2,844 Premium Upgrades
  • Motivation to Negotiate - High
More details
2020 GMC Sierra 1500 SLT 4WD photo
2020 GMC Sierra 1500 SLT 4WD • St Peters, MO
Blue • 5.3L V8 Engine
$29,556 • 149.5k miles
•••

#115 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “D-” Buy

  • Includes $5,898 Premium Upgrades
  • CARFAX: One Owner
  • Motivation to Negotiate - Increasing
More details
2020 GMC Sierra 1500 AT4 4WD photo
2020 GMC Sierra 1500 AT4 4WD • Anna, IL
Black • 3.0L I6 Engine
$35,900 • 93.5k miles
•••

#39 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “B+” Buy

  • Good Price - $1,215 Below Market
  • Includes $6,734 Premium Upgrades
  • Motivation to Negotiate - High
More details
2020 GMC Sierra 1500 Elevation 4WD photo
2020 GMC Sierra 1500 Elevation 4WD • Sullivan, MO
White • 2.7L I4 Engine
$33,855 • 60.7k miles
•••

#35 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “B+” Buy

  • Good Price - $1,362 Below Market
  • Includes $6,056 Premium Upgrades
  • Very Low Mileage
More details
2020 GMC Sierra 1500 Denali 4WD photo
2020 GMC Sierra 1500 Denali 4WD • Virden, IL
Red • 6.2L V8 Engine
$47,998 • 52k miles
•••

#100 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “D+” Buy

  • Includes $8,856 Premium Upgrades
  • CARFAX: One Owner
  • Motivation to Negotiate - Very High
More details
2021 GMC Sierra 1500 SLT 4WD photo
2021 GMC Sierra 1500 SLT 4WD • Salem, IL
White • 3.0L Engine
$41,988 • 75.5k miles
•••

#105 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “D” Buy

  • Includes $6,009 Premium Upgrades
  • Average Mileage
  • Dealer Rating - 4.5 stars
More details
2020 GMC Sierra 1500 Denali 4WD photo
Price Drop
2020 GMC Sierra 1500 Denali 4WD • Herculaneum, MO
Black • 3.0L I6 Engine
$34,548 • 128.9k miles
•••

#106 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “D” Buy

  • $349 Price Drop
  • Includes $5,930 Premium Upgrades
  • CARFAX: One Owner
More details
2021 GMC Sierra 1500 AT4 4WD photo
Price Drop
2021 GMC Sierra 1500 AT4 4WD • Sullivan, MO
White • 5.3L V8 Engine
$36,235 • 81.4k miles
•••

#76 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “B-” Buy

  • $2,860 Price Drop
  • Fair Price - $542 Above Market
  • Includes $1,117 Premium Upgrades
More details
2022 GMC Sierra 1500 Elevation 4WD photo
2022 GMC Sierra 1500 Elevation 4WD • Collinsville, IL
Black • 3.0L I6 Engine
$32,372 • 132.1k miles
•••

#75 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “B-” Buy

  • Fair Price - $9 Above Market
  • Includes $7,565 Premium Upgrades
  • CARFAX: One Owner
More details
2021 GMC Sierra 1500 AT4 4WD photo
Price Drop
2021 GMC Sierra 1500 AT4 4WD • Union, MO
Black • 6.2L V8 Engine
$43,249 • 19k miles
•••

#34 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “B+” Buy

  • $249 Price Drop
  • Good Price - $1,570 Below Market
  • Includes $2,514 Premium Upgrades
More details
2020 GMC Sierra 1500 SLT 4WD photo
2020 GMC Sierra 1500 SLT 4WD • Highland, IL
White • 5.3L V8 Engine
$23,999 • 162.3k miles
•••

#110 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “D-” Buy

  • Includes $2,597 Premium Upgrades
  • CARFAX: One Owner
  • Dealer Rating - 4.6 stars
More details
2021 GMC Sierra 1500 Elevation 4WD photo
2021 GMC Sierra 1500 Elevation 4WD • Red Bud, IL
White • 2.7L I4 Engine
$34,892 • 43.9k miles
•••

#84 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “C” Buy

  • Includes $1,032 Premium Upgrades
  • Motivation to Negotiate - High
  • Very Low Mileage
More details
2021 GMC Sierra 1500 SLT 4WD photo
8
2021 GMC Sierra 1500 SLT 4WD • Salem, IL
Black • 3.0L I6 Engine
$36,998 • 52k miles
•••

#8 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “B+” Buy

  • Great Price - $5,337 Below Market
  • Includes $5,096 Premium Upgrades
  • CARFAX: One Owner
More details
2022 GMC Sierra 1500 Elevation 4WD photo
2022 GMC Sierra 1500 Elevation 4WD • Fenton, MO
Black • 5.3L V8 Engine
$42,203 • 65.2k miles
•••

#62 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “B” Buy

  • Fair Price - $172 Above Market
  • Includes $4,903 Premium Upgrades
  • CARFAX: One Owner
More details
2021 GMC Sierra 1500 SLE 4WD photo
2021 GMC Sierra 1500 SLE 4WD • Collinsville, IL
Gray • 5.3L V8 Engine
$29,872 • 73.8k miles
•••

#112 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “D-” Buy

  • Includes $1,051 Premium Upgrades
  • CARFAX: One Owner
  • Average Mileage
More details
2021 GMC Sierra 1500 AT4 4WD photo
18
2021 GMC Sierra 1500 AT4 4WD • Troy, MO
White • 3.0L I6 Engine
$37,299 • 79.6k miles
•••

#18 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “B+” Buy

  • Great Price - $3,280 Below Market
  • Includes $4,842 Premium Upgrades
  • Motivation to Negotiate - Increasing
More details
2020 GMC Sierra 1500 SLE 4WD photo
19
Price Drop
2020 GMC Sierra 1500 SLE 4WD • Alton, IL
White • 3.0L I6 Engine
$24,977 • 107.2k miles
•••

#19 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “B+” Buy

  • $8 Price Drop
  • Great Price - $3,244 Below Market
  • Includes $5,199 Premium Upgrades
More details
2020 GMC Sierra 1500 SLT 4WD photo
2020 GMC Sierra 1500 SLT 4WD • St. Louis, MO
Gray • 5.3L V8 Engine
$34,395 • 110.1k miles
•••

#108 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “D” Buy

  • Includes $4,049 Premium Upgrades
  • CARFAX: One Owner
  • Dealer Rating - 4.5 stars
More details
2020 GMC Sierra 1500 SLE 4WD photo
Price Drop
2020 GMC Sierra 1500 SLE 4WD • Herculaneum, MO
Silver • 3.0L I6 Engine
$37,142 • 44.8k miles
•••

#98 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “D+” Buy

  • $263 Price Drop
  • Includes $5,133 Premium Upgrades
  • Motivation to Negotiate - Increasing
More details
2021 GMC Sierra 1500 SLE 4WD photo
Price Drop
2021 GMC Sierra 1500 SLE 4WD • St. Louis, MO
Silver • 5.3L V8 Engine
$24,862 • 148.1k miles
•••

#117 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “F” Buy

  • $242 Price Drop
  • Includes $835 Premium Upgrades
  • CARFAX: One Owner
More details
2021 GMC Sierra 1500 SLT 4WD photo
2021 GMC Sierra 1500 SLT 4WD • Ellisville, MO
Black • 3.0L I6 Engine
$34,610 • 81.7k miles
•••

#55 2020-2022 GMC Sierra 1500

CoPilot AI: It’s a “B” Buy

  • Fair Price - $652 Below Market
  • Includes $6,055 Premium Upgrades
  • Dealer Rating - 4.7 stars
More details
1-25 of 133 results
HomeGMCSierra 1500

2021 GMC Sierra 1500

Half-Ton Truck
Seats
6
Fuel Economy
16City MPG
21Hwy MPG
NHTSA Rating Summary
Copilot Rating
Dimensions
Most Popular Models like Sierra 1500
Research More Models
View more Crew Cab Pickups

© 2026 CoPilot. All Rights Reserved.