CoPilot AI-Assisted Car Shopping

 New Search
 Save
 Sort
 Share

Used 2018 GMC Sierra 1500 for Sale in Seattle, WA

Sierra 1500s for Sale at Dealers

Filters
Price
Year
Mileage
Trim
2019 GMC Sierra 1500 SLT 4WD photo
1
2019 GMC Sierra 1500 SLT 4WD Bellevue, WA
Black 5.3L V8 Engine
$40,825 25k miles
•••

#1 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA+” Buy

  • Great Price - $7,728 Below Market
  • Includes $10,043 Premium Upgrades
  • CARFAX: Clean Title, Not a rental or commercial vehicle
More details
2020 GMC Sierra 1500 Denali 4WD photo
2
Price Drop
2020 GMC Sierra 1500 Denali 4WD Lynden, WA
White 6.2L V8 Engine
$49,999 30.1k miles
•••

#2 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA+” Buy

  • $5,000 Price Drop
  • Great Price - $5,726 Below Market
  • Includes $11,571 Premium Upgrades
More details
2020 GMC Sierra 1500 Denali 4WD photo
3
2020 GMC Sierra 1500 Denali 4WD Olympia, WA
Black 6.2L V8 Engine
$47,880 30.8k miles
•••

#3 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA+” Buy

  • Great Price - $5,432 Below Market
  • Includes $9,528 Premium Upgrades
  • CARFAX: Clean Title
More details
2016 GMC Sierra 1500 SLT 4WD photo
4
Price Drop
2016 GMC Sierra 1500 SLT 4WD Fife, WA
Red 5.3L V8 Engine
$32,977 54.3k miles
•••

#4 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA+” Buy

  • $1,020 Price Drop
  • Great Price - $5,375 Below Market
  • Includes $10,105 Premium Upgrades
More details
2020 GMC Sierra 1500 SLT 4WD photo
5
Price Drop
2020 GMC Sierra 1500 SLT 4WD Puyallup, WA
Blue 6.2L V8 Engine
$40,160 49.7k miles
•••

#5 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA+” Buy

  • $585 Price Drop
  • Great Price - $5,016 Below Market
  • Includes $13,434 Premium Upgrades
More details
2020 GMC Sierra 1500 SLT 4WD photo
6
2020 GMC Sierra 1500 SLT 4WD Burlington, WA
Gray 6.2L V8 Engine
$39,986 58.6k miles
•••

#6 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA+” Buy

  • Great Price - $4,690 Below Market
  • Includes $13,182 Premium Upgrades
  • CARFAX: Clean Title, Not a rental or commercial vehicle
More details
2019 GMC Sierra 1500 SLT 4WD photo
7
Price Drop
2019 GMC Sierra 1500 SLT 4WD Ellensburg, WA
Gray 5.3L V8 Engine
$35,999 74.8k miles
•••

#7 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA+” Buy

  • $2,000 Price Drop
  • Great Price - $11,727 Below Market
  • Includes $8,029 Premium Upgrades
More details
2018 GMC Sierra 1500 SLE 4WD photo
8
2018 GMC Sierra 1500 SLE 4WD Everett, WA
5.3L V8 Engine
$16,599 132.4k miles
•••

#8 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA+” Buy

  • Great Price - $3,212 Below Market
  • Includes $547 Premium Upgrades
  • CARFAX: Clean Title
More details
2018 GMC Sierra 1500  4WD photo
9
Price Drop
2018 GMC Sierra 1500 4WD Bellingham, WA
Silver 4.3L V6 Engine
$21,500 68.9k miles
•••

#9 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA+” Buy

  • $1,000 Price Drop
  • Great Price - $2,289 Below Market
  • CARFAX: Clean Title, Not a rental or commercial vehicle
More details
2020 GMC Sierra 1500 Denali 4WD photo
10
Price Drop
2020 GMC Sierra 1500 Denali 4WD Burlington, WA
5.3L V8 Engine
$45,500 41.6k miles
•••

#10 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA+” Buy

  • $275 Price Drop
  • Good Price - $1,446 Below Market
  • Includes $4,591 Premium Upgrades
More details
2019 GMC Sierra 1500 Denali 4WD photo
11
2019 GMC Sierra 1500 Denali 4WD Auburn, WA
Gray 6.2L V8 Engine
$37,427 90.7k miles
•••

#11 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA” Buy

  • Good Price - $2,310 Below Market
  • Includes $7,379 Premium Upgrades
  • CARFAX: One Owner, Clean Title, Not a rental or commercial vehicle
More details
2018 GMC Sierra 1500 SLT 4WD photo
12
Price Drop
2018 GMC Sierra 1500 SLT 4WD Puyallup, WA
Red 5.3L V8 Engine
$34,297 58.7k miles
•••

#12 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA” Buy

  • $400 Price Drop
  • Fair Price - $562 Below Market
  • Includes $6,922 Premium Upgrades
More details
2020 GMC Sierra 1500 SLT 4WD photo
13
2020 GMC Sierra 1500 SLT 4WD Olympia, WA
Silver 5.3L V8 Engine
$43,999 42.9k miles
•••

#13 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA” Buy

  • Fair Price - $555 Below Market
  • Includes $11,004 Premium Upgrades
  • CARFAX: Clean Title, Not a rental or commercial vehicle
More details
2018 GMC Sierra 1500 Denali 4WD photo
14
2018 GMC Sierra 1500 Denali 4WD Woodinville, WA
White 6.2L Engine
$39,995 25k miles
•••

#14 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA” Buy

  • Fair Price - $174 Below Market
  • Includes $7,980 Premium Upgrades
  • CARFAX: Clean Title
More details
2016 GMC Sierra 1500 Denali 4WD photo
15
2016 GMC Sierra 1500 Denali 4WD Bellevue, WA
Black 6.2L V8 Engine
$32,888 98.3k miles
•••

#15 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA” Buy

  • Fair Price - $553 Above Market
  • Includes $4,616 Premium Upgrades
  • CARFAX: Clean Title
More details
2016 GMC Sierra 1500  RWD photo
16
2016 GMC Sierra 1500 RWD Lynnwood, WA
White 4.3L V6 Engine
$16,999 76k miles
•••

#16 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA-” Buy

  • Good Price - $1,017 Below Market
  • CARFAX: Clean Title
  • Very Low Mileage
More details
2018 GMC Sierra 1500 SLT RWD photo
17
Price Drop
2018 GMC Sierra 1500 SLT RWD Renton, WA
Black 5.3L V8 Engine
$23,000 121k miles
•••

#17 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA-” Buy

  • $400 Price Drop
  • Fair Price - $315 Below Market
  • Includes $2,025 Premium Upgrades
More details
2018 GMC Sierra 1500 Denali 4WD photo
18
2018 GMC Sierra 1500 Denali 4WD Puyallup, WA
Black 6.2L Engine
$33,487 85.3k miles
•••

#18 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA-” Buy

  • Fair Price - $274 Below Market
  • Includes $6,289 Premium Upgrades
  • CARFAX: One Owner, Clean Title, Not a rental or commercial vehicle
More details
2018 GMC Sierra 1500 Denali 4WD photo
19
2018 GMC Sierra 1500 Denali 4WD Renton, WA
Silver 5.3L V8 Engine
$32,993 83.3k miles
•••

#19 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA-” Buy

  • Fair Price - $138 Below Market
  • Includes $2,626 Premium Upgrades
  • CARFAX: Clean Title, Not a rental or commercial vehicle
More details
2018 GMC Sierra 1500 Denali 4WD photo
20
2018 GMC Sierra 1500 Denali 4WD Puyallup, WA
White 6.2L V8 Engine
$32,987 102.8k miles
•••

#20 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA-” Buy

  • Fair Price - $621 Above Market
  • Includes $4,217 Premium Upgrades
  • CARFAX: Clean Title, Not a rental or commercial vehicle
More details
2019 GMC Sierra 1500 SLT 4WD photo
21
Price Drop
2019 GMC Sierra 1500 SLT 4WD Tacoma, WA
White 5.3L V8 Engine
$34,721 94.6k miles
•••

#21 2016-2020 GMC Sierra 1500

CoPilot AI: It’s anA-” Buy

  • $1,191 Price Drop
  • Fair Price - $873 Above Market
  • Includes $5,020 Premium Upgrades
More details
2017 GMC Sierra 1500 SLT RWD photo
22
Price Drop
2017 GMC Sierra 1500 SLT RWD Seattle, WA
White 5.3L V8 Engine
$25,991 82k miles
•••

#22 2016-2020 GMC Sierra 1500

CoPilot AI: It’s aB+” Buy

  • $1,000 Price Drop
  • Great Price - $7,478 Below Market
  • Includes $7,502 Premium Upgrades
More details
2020 GMC Sierra 1500 Denali 4WD photo
23
Price Drop
2020 GMC Sierra 1500 Denali 4WD Fife, WA
White 3.0L I6 Engine
$42,637 54k miles
•••

#23 2016-2020 GMC Sierra 1500

CoPilot AI: It’s aB+” Buy

  • $858 Price Drop
  • Great Price - $6,939 Below Market
  • Includes $13,255 Premium Upgrades
More details
2020 GMC Sierra 1500 SLT 4WD photo
24
2020 GMC Sierra 1500 SLT 4WD East Wenatchee, WA
Blue 5.3L V8 Engine
$43,890 40.7k miles
•••

#24 2016-2020 GMC Sierra 1500

CoPilot AI: It’s aB+” Buy

  • Great Price - $5,064 Below Market
  • Includes $11,281 Premium Upgrades
  • CARFAX: One Owner, Clean Title, Not a rental or commercial vehicle
More details
2017 GMC Sierra 1500 SLT 4WD photo
25
Price Drop
2017 GMC Sierra 1500 SLT 4WD Ellensburg, WA
Silver 6.2L V8 Engine
$23,999 142.2k miles
•••

#25 2016-2020 GMC Sierra 1500

CoPilot AI: It’s aB+” Buy

  • $1,000 Price Drop
  • Great Price - $4,172 Below Market
  • Includes $9,532 Premium Upgrades
More details
1-25 of 103 results

2018 GMC Sierra 1500

Half-Ton Truck
Seats
3
Fuel Economy
17City MPG
22Hwy MPG
NHTSA Rating Summary
Copilot Rating
Dimensions

© 2025 CoPilot. All Rights Reserved.