CoPilot AI-Assisted Car Shopping

 New Search
 Save
 Sort
 Share

Used 2021 GMC Sierra 1500 for Sale in Denton, TX

Sierra 1500s for Sale at Dealers

Filters
Price
Year
Mileage
Trim
2021 GMC Sierra 1500 AT4 4WD photo
Price Drop
New Find
2021 GMC Sierra 1500 AT4 4WD • Denton, TX
Gray • 6.2L V8 Engine
$42,202 • 52.4k miles
•••

Not Ranked

CoPilot AI: It’s an “A+” Buy

  • $478 Price Drop
  • Good Price - $2,572 Below Market
  • Includes $8,141 Premium Upgrades
More details
2021 GMC Sierra 1500 AT4 4WD photo
New Find
2021 GMC Sierra 1500 AT4 4WD • Denton, TX
White • 6.2L V8 Engine
$36,990 • 79.8k miles
•••

Not Ranked

CoPilot AI: It’s an “A+” Buy

  • Great Price - $3,998 Below Market
  • Includes $9,901 Premium Upgrades
  • CARFAX: One Owner
More details
2021 GMC Sierra 1500 SLT 4WD photo
Price Drop
2021 GMC Sierra 1500 SLT 4WD • Sanger, TX
White • 6.2L V8 Engine
$39,125 • 21.9k miles
•••

Not Ranked

CoPilot AI: It’s an “A” Buy

  • $1,000 Price Drop
  • Fair Price - $281 Below Market
  • Includes $4,243 Premium Upgrades
More details
2021 GMC Sierra 1500 SLT RWD photo
Price Drop
2021 GMC Sierra 1500 SLT RWD • Lewisville, TX
Silver • 5.3L V8 Engine
$30,951 • 58.7k miles
•••

Not Ranked

CoPilot AI: It’s an “A+” Buy

  • $999 Price Drop
  • Great Price - $2,605 Below Market
  • Includes $3,606 Premium Upgrades
More details
2021 GMC Sierra 1500 AT4 4WD photo
Price Drop
New Find
2021 GMC Sierra 1500 AT4 4WD • Lewisville, TX
Black • 3.0L I6 Engine
$30,951 • 93.9k miles
•••

Not Ranked

CoPilot AI: It’s a “B+” Buy

  • $999 Price Drop
  • Good Price - $1,184 Below Market
  • Includes $577 Premium Upgrades
More details
2021 GMC Sierra 1500 SLT 4WD photo
2021 GMC Sierra 1500 SLT 4WD • Lewisville, TX
Gray • 6.2L V8 Engine
$30,713
•••
More details
2021 GMC Sierra 1500 Denali 4WD photo
2021 GMC Sierra 1500 Denali 4WD • Prosper, TX
Black • 6.2L V8 Engine
$45,219 • 62.6k miles
•••

Not Ranked

CoPilot AI: It’s a “C-” Buy

  • Includes $8,529 Premium Upgrades
  • CARFAX: One Owner
  • Motivation to Negotiate - Very High
More details
2021 GMC Sierra 1500 Elevation  photo
Price Drop
2021 GMC Sierra 1500 Elevation • Prosper, TX
White • 3.0L I6 Engine
$29,859 • 79.3k miles
•••

Not Ranked

CoPilot AI: It’s an “A-” Buy

  • $2,139 Price Drop
  • Fair Price - $705 Below Market
  • Includes $2,877 Premium Upgrades
More details
2021 GMC Sierra 1500 Elevation 4WD photo
Price Drop
2021 GMC Sierra 1500 Elevation 4WD • Plano, TX
White • 5.3L V8 Engine
$33,753 • 60.3k miles
•••

Not Ranked

CoPilot AI: It’s an “A-” Buy

  • $200 Price Drop
  • Fair Price - $107 Above Market
  • Includes $1,814 Premium Upgrades
More details
2021 GMC Sierra 1500 Elevation 4WD photo
New Find
2021 GMC Sierra 1500 Elevation 4WD • Grapevine, TX
Red • 5.3L V8 Engine
$33,666 • 69.5k miles
•••

Not Ranked

CoPilot AI: It’s a “C-” Buy

  • Includes $2,611 Premium Upgrades
  • Average Mileage
  • Dealer Rating - 4.3 stars
More details
2021 GMC Sierra 1500 SLT 4WD photo
Price Drop
New Find
2021 GMC Sierra 1500 SLT 4WD • Plano, TX
Gray • 3.0L I6 Engine
$34,219 • 47.7k miles
•••

Not Ranked

CoPilot AI: It’s a “B+” Buy

  • $600 Price Drop
  • Great Price - $9,360 Below Market
  • Includes $10,289 Premium Upgrades
More details
2021 GMC Sierra 1500 Elevation 4WD photo
Price Drop
New Find
2021 GMC Sierra 1500 Elevation 4WD • Grapevine, TX
Gray • 5.3L V8 Engine
$33,125 • 78.8k miles
•••

Not Ranked

CoPilot AI: It’s a “D+” Buy

  • $225 Price Drop
  • Includes $1,385 Premium Upgrades
  • Dealer Rating - 4.0 stars
More details
2021 GMC Sierra 1500 SLT RWD photo
New Find
2021 GMC Sierra 1500 SLT RWD • Frisco, TX
Red • 3.0L I6 Engine
$27,725 • 96.1k miles
•••

Not Ranked

CoPilot AI: It’s a “B+” Buy

  • Great Price - $2,610 Below Market
  • Includes $4,544 Premium Upgrades
  • Dealer Rating - 4.4 stars
More details
2021 GMC Sierra 1500 AT4 4WD photo
Price Drop
2021 GMC Sierra 1500 AT4 4WD • Plano, TX
White • 5.3L V8 Engine
$32,399 • 83.9k miles
•••

Not Ranked

CoPilot AI: It’s an “A+” Buy

  • $300 Price Drop
  • Great Price - $3,258 Below Market
  • Includes $1,519 Premium Upgrades
More details
2021 GMC Sierra 1500 SLT 4WD photo
2021 GMC Sierra 1500 SLT 4WD • Carrollton, TX
Black • 5.3L V8 Engine
$33,928 • 97.8k miles
•••

Not Ranked

CoPilot AI: It’s a “B-” Buy

  • Includes $5,392 Premium Upgrades
  • Motivation to Negotiate - Increasing
  • Dealer Rating - 4.6 stars
More details
2021 GMC Sierra 1500 Elevation 4WD photo
Price Drop
2021 GMC Sierra 1500 Elevation 4WD • Addison, TX
Gray • 3.0L I6 Engine
$31,498 • 51.1k miles
•••

Not Ranked

CoPilot AI: It’s an “A+” Buy

  • Great Price - $4,422 Below Market
  • Includes $3,156 Premium Upgrades
  • Motivation to Negotiate - Increasing
More details
2021 GMC Sierra 1500 SLT 4WD photo
New Find
2021 GMC Sierra 1500 SLT 4WD • Irving, TX
Black • 6.2L V8 Engine
$34,096 • 93.9k miles
•••

Not Ranked

CoPilot AI: It’s an “A-” Buy

  • Fair Price - $562 Above Market
  • Includes $5,962 Premium Upgrades
  • Dealer Rating - 4.4 stars
More details
2021 GMC Sierra 1500  4WD photo
Price Drop
New Find
2021 GMC Sierra 1500 4WD • Plano, TX
Gray • 5.3L V8 Engine
$22,221 • 90.8k miles
•••

Not Ranked

CoPilot AI: It’s an “A” Buy

  • $3,252 Price Drop
  • Good Price - $1,325 Below Market
  • Includes $3,677 Premium Upgrades
More details
2021 GMC Sierra 1500 AT4 4WD photo
Price Drop
2021 GMC Sierra 1500 AT4 4WD • Addison, TX
White • 3.0L I6 Engine
$28,221 • 118.9k miles
•••

Not Ranked

CoPilot AI: It’s a “B+” Buy

  • $1,000 Price Drop
  • Great Price - $1,808 Below Market
  • Includes $521 Premium Upgrades
More details
2021 GMC Sierra 1500  4WD photo
Price Drop
New Find
2021 GMC Sierra 1500 4WD • Decatur, TX
White • 4.3L V6 Engine
$23,480 • 88.9k miles
•••

Not Ranked

CoPilot AI: It’s a “D+” Buy

  • $200 Price Drop
  • Includes $1,050 Premium Upgrades
  • Dealer Rating - 4.7 stars
More details
2021 GMC Sierra 1500 AT4 4WD photo
2021 GMC Sierra 1500 AT4 4WD • Dallas, TX
Red • 3.0L I6 Engine
$36,035 • 61.5k miles
•••

Not Ranked

CoPilot AI: It’s an “A+” Buy

  • Great Price - $2,813 Below Market
  • Includes $3,164 Premium Upgrades
  • Motivation to Negotiate - Increasing
More details
2021 GMC Sierra 1500 Elevation 4WD photo
2021 GMC Sierra 1500 Elevation 4WD • Plano, TX
Gray • 5.3L V8 Engine
$32,213 • 68.5k miles
•••

Not Ranked

CoPilot AI: It’s an “A-” Buy

  • Fair Price - $410 Below Market
  • Includes $3,307 Premium Upgrades
  • CARFAX: One Owner
More details
2021 GMC Sierra 1500 Denali RWD photo
New Find
2021 GMC Sierra 1500 Denali RWD • North Richland Hills, TX
Red • 5.3L V8 Engine
$37,220 • 66k miles
•••

Not Ranked

CoPilot AI: It’s a “C-” Buy

  • Includes $2,679 Premium Upgrades
  • CARFAX: One Owner
  • Average Mileage
More details
2021 GMC Sierra 1500 AT4 4WD photo
Price Drop
2021 GMC Sierra 1500 AT4 4WD • North Richland Hills, TX
Red • 5.3L V8 Engine
$39,445 • 51.7k miles
•••

Not Ranked

CoPilot AI: It’s an “A-” Buy

  • $770 Price Drop
  • Fair Price - $290 Below Market
  • Includes $1,280 Premium Upgrades
More details
2021 GMC Sierra 1500 AT4 4WD photo
Price Drop
2021 GMC Sierra 1500 AT4 4WD • Dallas, TX
Black • 3.0L I6 Engine
$26,224 • 141k miles
•••

Not Ranked

CoPilot AI: It’s a “B+” Buy

  • $1,000 Price Drop
  • Great Price - $4,861 Below Market
  • Includes $6,072 Premium Upgrades
More details
1-25 of 109 results

2021 GMC Sierra 1500

Half-Ton Truck
Seats
6
Fuel Economy
16City MPG
21Hwy MPG
NHTSA Rating Summary
Copilot Rating
Dimensions

© 2026 CoPilot. All Rights Reserved.