CoPilot AI-Assisted Car Shopping

 New Search
 Save
 Sort
 Share

Used 2020 GMC Sierra 1500 for Sale in Madison, WI

Sierra 1500s for Sale at Dealers

Filters
Price
Year
Mileage
Trim
2021 GMC Sierra 1500 Elevation 4WD photo
Price Drop
2021 GMC Sierra 1500 Elevation 4WD • Madison, WI
Gray • 2.7L I4 Engine
$27,389 • 90.4k miles
•••

Not Ranked

CoPilot AI: It’s an “A+” Buy

  • Great Price - $2,968 Below Market
  • Includes $1,403 Premium Upgrades
  • CARFAX: One Owner
More details
2019 GMC Sierra 1500 SLT 4WD photo
Price Drop
New Find
2019 GMC Sierra 1500 SLT 4WD • Madison, WI
Black • 5.3L V8 Engine
$29,996 • 104.7k miles
•••

Not Ranked

CoPilot AI: It’s an “A-” Buy

  • $319 Price Drop
  • Fair Price - $251 Below Market
  • Includes $7,178 Premium Upgrades
More details
2021 GMC Sierra 1500 Elevation 4WD photo
Price Drop
2021 GMC Sierra 1500 Elevation 4WD • Madison, WI
Gray • 3.0L I6 Engine
$32,774 • 75.4k miles
•••

Not Ranked

CoPilot AI: It’s a “D+” Buy

  • $449 Price Drop
  • Includes $1,467 Premium Upgrades
  • CARFAX: One Owner
More details
2020 GMC Sierra 1500 SLT 4WD photo
Price Drop
2020 GMC Sierra 1500 SLT 4WD • Madison, WI
Blue • 5.3L V8 Engine
$31,727 • 100.2k miles
•••

Not Ranked

CoPilot AI: It’s a “B+” Buy

  • $52 Price Drop
  • Fair Price - $39 Above Market
  • Includes $7,484 Premium Upgrades
More details
2021 GMC Sierra 1500 Elevation 4WD photo
New Find
2021 GMC Sierra 1500 Elevation 4WD • Madison, WI
White • 3.0L I6 Engine
$32,294 • 109.3k miles
•••

Not Ranked

CoPilot AI: It’s a “C-” Buy

  • Includes $2,762 Premium Upgrades
  • Dealer Rating - 4.9 stars
More details
2020 GMC Sierra 1500 Elevation 4WD photo
2020 GMC Sierra 1500 Elevation 4WD • Sun Prairie, WI
Black • 3.0L I6 Engine
$27,851 • 125.5k miles
•••

Not Ranked

CoPilot AI: It’s an “A-” Buy

  • Fair Price - $590 Below Market
  • Includes $3,950 Premium Upgrades
  • Motivation to Negotiate - Increasing
More details
2021 GMC Sierra 1500 Denali 4WD photo
Price Drop
2021 GMC Sierra 1500 Denali 4WD • Stoughton, WI
White • 3.0L I6 Engine
$43,995 • 7.3k miles
•••

Not Ranked

CoPilot AI: It’s an “A+” Buy

  • $4,000 Price Drop
  • Great Price - $4,234 Below Market
  • Includes $8,663 Premium Upgrades
More details
2021 GMC Sierra 1500 Denali 4WD photo
Price Drop
2021 GMC Sierra 1500 Denali 4WD • Stoughton, WI
Gray • 6.2L V8 Engine
$36,469 • 87.1k miles
•••

Not Ranked

CoPilot AI: It’s a “C-” Buy

  • Includes $2,953 Premium Upgrades
  • Motivation to Negotiate - Increasing
More details
2019 GMC Sierra 1500 SLT 4WD photo
2019 GMC Sierra 1500 SLT 4WD • Stoughton, WI
White • 5.3L V8 Engine
$31,196 • 100.1k miles
•••

Not Ranked

CoPilot AI: It’s a “D” Buy

  • Average Mileage
More details
2020 GMC Sierra 1500 Denali 4WD photo
Price Drop
2020 GMC Sierra 1500 Denali 4WD • Stoughton, WI
Red • 5.3L V8 Engine
$36,955 • 54.4k miles
•••

Not Ranked

CoPilot AI: It’s a “B+” Buy

  • Fair Price - $940 Above Market
  • Includes $360 Premium Upgrades
  • Motivation to Negotiate - High
More details
2020 GMC Sierra 1500 Denali 4WD photo
Price Drop
2020 GMC Sierra 1500 Denali 4WD • Arlington, WI
White • 6.2L V8 Engine
$36,738 • 64.6k miles
•••

Not Ranked

CoPilot AI: It’s an “A+” Buy

  • $596 Price Drop
  • Great Price - $4,143 Below Market
  • Includes $10,067 Premium Upgrades
More details
2021 GMC Sierra 1500 AT4 4WD photo
Price Drop
2021 GMC Sierra 1500 AT4 4WD • Sauk City, WI
Red • 6.2L V8 Engine
$39,239 • 47k miles • Certified
•••

Not Ranked

CoPilot AI: It’s an “A-” Buy

  • $206 Price Drop
  • Fair Price - $697 Below Market
  • Includes $1,015 Premium Upgrades
More details
2021 GMC Sierra 1500 SLT 4WD photo
Price Drop
2021 GMC Sierra 1500 SLT 4WD • Sauk City, WI
White • 3.0L I6 Engine
$29,496 • 103.7k miles
•••

Not Ranked

CoPilot AI: It’s an “A+” Buy

  • $503 Price Drop
  • Great Price - $6,354 Below Market
  • Includes $8,527 Premium Upgrades
More details
2019 GMC Sierra 1500 4WD photo
New Find
2019 GMC Sierra 1500 4WD • Milton, WI
Black • 5.3L V8 Engine
$25,468 • 80.4k miles
•••

Not Ranked

CoPilot AI: It’s a “C-” Buy

  • Includes $1,906 Premium Upgrades
  • Below Average Mileage
  • Dealer Rating - 4.9 stars
More details
2021 GMC Sierra 1500 SLT 4WD photo
Price Drop
2021 GMC Sierra 1500 SLT 4WD • Milton, WI
White • 6.2L V8 Engine
$34,468 • 86.7k miles
•••

Not Ranked

CoPilot AI: It’s a “C-” Buy

  • $500 Price Drop
  • Includes $2,442 Premium Upgrades
  • CARFAX: One Owner
More details
2021 GMC Sierra 1500 AT4 4WD photo
Price Drop
2021 GMC Sierra 1500 AT4 4WD • Johnson Creek, WI
Gray • 3.0L I6 Engine
$29,489 • 131.2k miles
•••

Not Ranked

CoPilot AI: It’s a “C” Buy

  • $1,500 Price Drop
  • Includes $889 Premium Upgrades
  • Motivation to Negotiate - Increasing
More details
2021 GMC Sierra 1500 Denali 4WD photo
Price Drop
2021 GMC Sierra 1500 Denali 4WD • Johnson Creek, WI
6.2L V8 Engine
$33,989 • 102.7k miles
•••

Not Ranked

CoPilot AI: It’s an “A+” Buy

  • $1,000 Price Drop
  • Great Price - $2,364 Below Market
  • Includes $1,295 Premium Upgrades
More details
2020 GMC Sierra 1500 SLT 4WD photo
New Find
2020 GMC Sierra 1500 SLT 4WD • Janesville, WI
White • 5.3L V8 Engine
$38,615 • 65.3k miles
•••

Not Ranked

CoPilot AI: It’s a “C” Buy

  • Includes $9,863 Premium Upgrades
  • CARFAX: One Owner
  • Below Average Mileage
More details
2021 GMC Sierra 1500 Elevation 4WD photo
New Find
2021 GMC Sierra 1500 Elevation 4WD • Janesville, WI
Red • 3.0L I6 Engine
$35,422 • 93.8k miles
•••

Not Ranked

CoPilot AI: It’s a “C-” Buy

  • Includes $2,176 Premium Upgrades
More details
2021 GMC Sierra 1500 SLT 4WD photo
New Find
2021 GMC Sierra 1500 SLT 4WD • Janesville, WI
Gray • 3.0L I6 Engine
$30,425 • 141k miles
•••

Not Ranked

CoPilot AI: It’s a “D+” Buy

  • Includes $7,268 Premium Upgrades
More details
2021 GMC Sierra 1500 SLT RWD photo
New Find
2021 GMC Sierra 1500 SLT RWD • Janesville, WI
Blue • 3.0L I6 Engine
$37,080 • 54.6k miles
•••

Not Ranked

CoPilot AI: It’s a “C” Buy

  • Includes $4,276 Premium Upgrades
  • CARFAX: One Owner
  • Below Average Mileage
More details
2021 GMC Sierra 1500 Denali 4WD photo
Price Drop
2021 GMC Sierra 1500 Denali 4WD • Janesville, WI
Black • 6.2L V8 Engine
$40,335 • 60.3k miles
•••

Not Ranked

CoPilot AI: It’s an “A” Buy

  • $500 Price Drop
  • Good Price - $1,328 Below Market
  • Includes $5,299 Premium Upgrades
More details
2020 GMC Sierra 1500 Elevation 4WD photo
Price Drop
2020 GMC Sierra 1500 Elevation 4WD • Janesville, WI
Gray • 5.3L V8 Engine
$33,255 • 96.8k miles
•••

Not Ranked

CoPilot AI: It’s a “C-” Buy

  • Includes $2,901 Premium Upgrades
  • Motivation to Negotiate - High
More details
2019 GMC Sierra 1500 AT4 4WD photo
New Find
2019 GMC Sierra 1500 AT4 4WD • Janesville, WI
Gray • 5.3L V8 Engine
$38,710 • 50.4k miles
•••

Not Ranked

CoPilot AI: It’s a “B” Buy

  • Includes $5,389 Premium Upgrades
  • Very Low Mileage
  • Dealer Rating - 4.5 stars
More details
2019 GMC Sierra 1500 SLT 4WD photo
Price Drop
2019 GMC Sierra 1500 SLT 4WD • Janesville, WI
Gray • 5.3L V8 Engine
$33,316 • 80.2k miles • Certified
•••

Not Ranked

CoPilot AI: It’s an “A-” Buy

  • $1,058 Price Drop
  • Fair Price - $357 Above Market
  • Includes $7,743 Premium Upgrades
More details
1-25 of 188 results
HomeGMCSierra 1500

2020 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
GMC Sierra 1500 near Madison, WI
Other Years
Research More Models
View more Crew Cab Pickups

© 2026 CoPilot. All Rights Reserved.