(opens in new window)
Sign In
Home
Used Cars
New Cars
Private Seller Cars
Sell My Car
Instant Cash Offer
Research & Tools
Helpful Links
Find Local Dealers
Best Car Deals
Best Truck Deals
Best SUV Deals
Buy Cars Online
Car Research & News
Research & Information
New & Future Models
Trim Comparisons
Car Buying Tools
Buying & Selling Tips
Car Payment Calculator
Affordability Calculator
Car Lease Calculator
See if you can save on car insurance on KBB.com
Get a Kelley Blue Book® Instant Cash Offer
Run a free AutoCheck Vehicle History Report with Experian
AI Mode
Beta
Home
Used Cars
New Cars
Private Seller Cars
Sell My Car
Instant Cash Offer
Research & Tools
AI Mode
Beta
Skip to vehicle Listings
Online car buying built around you.
Shop Now
Used Cars for Sale
GMC
Sierra 3500
SLT
Used GMC Sierra 3500 SLT for Sale in Westminster, CO
80030
Filters (4)
Items 1 to 2 of 8.
Purchase Online
(1)
GMC Certified Pre-Owned
(1)
2018 and older
(2)
Black
(2)
AWD/4WD
(12)
Cruise Control
(11)
2015 and newer
(12)
Location & Delivery
Year
Price & Payments
Price
Payment
Min Price
Max Price
Price Rating
Good Price
(1)
Great Price
(5)
Price
Payment
Min Price
Max Price
Price Rating
Good Price
(1)
Great Price
(5)
Make, Model & Trim
GMC
Models
Sierra 3500
Acadia
(78)
Caballero
Canyon
(48)
Envoy
(1)
Envoy XL
Envoy XUV
G1500
G2500
G3500
(1)
Hummer EV
(10)
Jimmy
(1)
Other GMC Models
S15 Jimmy
S15 Pickup
Safari
Savana 1500
(3)
Savana 2500
(5)
Savana 3500
(14)
Savana 4500
Sierra 1500
(302)
Sierra 2500
(108)
Sierra 3500
(81)
Sierra EV
(1)
Sonoma
Suburban
Syclone
Terrain
(102)
TopKick C4500
TopKick C5500
Typhoon
Yukon
(118)
Yukon XL
(74)
Sierra 3500 Trims
SLT
AT4
(11)
Classic SL
Classic SLE
Classic W/T
Denali
(41)
Denali Ultimate
(5)
Pro
(2)
SL
(1)
SLE
(5)
SLT
(12)
W/T
(2)
SLT Package
Any
Onstar Plus Package
SLT Preferred Package
(2)
LPO, Hitch Package
(1)
SLT Premium Plus Package
Sun And Navigation Package
SLT Convenience Package
(5)
License Plate Front Mounting Package
Snow Plow Prep Package
Entertainment Package, Rear Seat DVD Player
Convenience Package
Gooseneck/5th Wheel Prep Package
(4)
X31 Off-Road and Protection Package
(2)
Texas SLT Premium Package
Driver Alert Package II
(2)
EZ-Lift Tailgate Package
LPO, Cargo Convenience Package
Sierra HD Pro Safety Plus Package
(1)
LPO, GMC Interior Protection Package
Heavy Duty Front Spring/Camper Package
(2)
X31 Off-Road Package
(4)
Entertainment Package, Rear Seat DVD/Blu-Ray Player
LPO, Black Badging Package
SLT Premium Package
(3)
Duramax Plus Package
(1)
Skid Plate Package, Frame-Mounted Shields
Suspension Package, Off-Road
(1)
Texas Edition SLT Premium Plus Package
Heavy-Duty Power Package
Driver Alert Package I
(2)
Driver Alert Package
Gooseneck/5TH Wheel Prep Package -- Hitch Platform to Accept Gooseneck or Fifth Wheel Hitch.
LPO, Protection Package
LPO, Hitch Package, Gooseneck Ball and Chain Tiedown Kit With Case
Z71 Off-Road Package
LPO, On The Job Package
Snow Plow Prep/Camper Package
Gooseneck/5TH Wheel Package
(1)
Gooseneck/5TH Wheel Prep Package
(4)
LPO, Assist Step and Floor Liner Package
All-Terrain HD Package, For Crew Cab Models Only
Technology Package
(1)
Mocha Steel Metallic Edition
SLT Preferred Equipment Group
Skid Plate Package
LPO, GMC Protection Package
All-Terrain HD Package
Entertainment Package
Graphite Blue Metallic Edition
Add Another Make
GMC
Models
Sierra 3500
Acadia
(78)
Caballero
Canyon
(48)
Envoy
(1)
Envoy XL
Envoy XUV
G1500
G2500
G3500
(1)
Hummer EV
(10)
Jimmy
(1)
Other GMC Models
S15 Jimmy
S15 Pickup
Safari
Savana 1500
(3)
Savana 2500
(5)
Savana 3500
(14)
Savana 4500
Sierra 1500
(302)
Sierra 2500
(108)
Sierra 3500
(81)
Sierra EV
(1)
Sonoma
Suburban
Syclone
Terrain
(102)
TopKick C4500
TopKick C5500
Typhoon
Yukon
(118)
Yukon XL
(74)
Sierra 3500 Trims
SLT
AT4
(11)
Classic SL
Classic SLE
Classic W/T
Denali
(41)
Denali Ultimate
(5)
Pro
(2)
SL
(1)
SLE
(5)
SLT
(12)
W/T
(2)
SLT Package
Any
Onstar Plus Package
SLT Preferred Package
(2)
LPO, Hitch Package
(1)
SLT Premium Plus Package
Sun And Navigation Package
SLT Convenience Package
(5)
License Plate Front Mounting Package
Snow Plow Prep Package
Entertainment Package, Rear Seat DVD Player
Convenience Package
Gooseneck/5th Wheel Prep Package
(4)
X31 Off-Road and Protection Package
(2)
Texas SLT Premium Package
Driver Alert Package II
(2)
EZ-Lift Tailgate Package
LPO, Cargo Convenience Package
Sierra HD Pro Safety Plus Package
(1)
LPO, GMC Interior Protection Package
Heavy Duty Front Spring/Camper Package
(2)
X31 Off-Road Package
(4)
Entertainment Package, Rear Seat DVD/Blu-Ray Player
LPO, Black Badging Package
SLT Premium Package
(3)
Duramax Plus Package
(1)
Skid Plate Package, Frame-Mounted Shields
Suspension Package, Off-Road
(1)
Texas Edition SLT Premium Plus Package
Heavy-Duty Power Package
Driver Alert Package I
(2)
Driver Alert Package
Gooseneck/5TH Wheel Prep Package -- Hitch Platform to Accept Gooseneck or Fifth Wheel Hitch.
LPO, Protection Package
LPO, Hitch Package, Gooseneck Ball and Chain Tiedown Kit With Case
Z71 Off-Road Package
LPO, On The Job Package
Snow Plow Prep/Camper Package
Gooseneck/5TH Wheel Package
(1)
Gooseneck/5TH Wheel Prep Package
(4)
LPO, Assist Step and Floor Liner Package
All-Terrain HD Package, For Crew Cab Models Only
Technology Package
(1)
Mocha Steel Metallic Edition
SLT Preferred Equipment Group
Skid Plate Package
LPO, GMC Protection Package
All-Terrain HD Package
Entertainment Package
Graphite Blue Metallic Edition
Add Another Make
Mileage
Mileage
Any
Mileage
Any
Condition
(1 selected)
New
(5)
Used
(12)
Manufacturer Certified
(1)
Third-Party Certified
(0)
Certified Program
Learn more
New
(5)
Used
(12)
Manufacturer Certified
(1)
Third-Party Certified
(0)
Certified Program
Learn more
Color
Loading...
Drive Type
Loading...
Body Style
Loading...
Truck Cab Size
Crew Cab
(12)
Extended Cab
(0)
Regular Cab
(0)
Crew Cab
(12)
Extended Cab
(0)
Regular Cab
(0)
Truck Bed Length
Short
(0)
Medium
(6)
Long
(6)
Include unspecified lengths
(0)
Short
(0)
Medium
(6)
Long
(6)
Include unspecified lengths
(0)
Vehicle History
Loading...
Features
Loading...
Fuel Type
Loading...
Fuel Economy
Loading...
Transmission
Loading...
Cylinders
Loading...
Engine Displacement
Loading...
Number of Seats
Loading...
Number of Doors
Loading...
Purchase Options
Seller Type
Loading...
Sponsored by Red Rock GMC
Hide
Used 2023 GMC Sierra 3500 Denali w/ Denali Ultimate Package
73,995
Similar Match
62
View Vehicles
12 Matches
Sort By:
Relevance
Price - Lowest
Price - Highest
Distance - Closest
Date - Oldest
Date - Newest
Mileage - Lowest
Mileage - Highest
Year - Oldest
Year - Newest
Sponsored
360°
Used
2024 GMC Sierra 3500
SLT
50K mi
62,997
See payment
Great Price
No Accidents
Sponsored
Used
2022 GMC Sierra 3500
SLT
80K mi
53,970
See payment
Good Price
No Accidents
Sponsored
Used
2024 GMC Sierra 3500
SLT
59K mi
62,099
See payment
Great Price
No Accidents
My Wallet
Find it Fast.
Keep it Affordable.
Monthly Payment
Credit Score
Excellent (740-900)
Down Payment
Trade-In Value
$0
Get My Kelley Blue Book® Car Value
$
Based on 4.5% APR for mos.
Update Settings
Search Available Cars
Used
2021 GMC Sierra 3500
SLT
27K mi
59,845
See payment
360°
Used
2024 GMC Sierra 3500
SLT
50K mi
62,997
See payment
Great Price
No Accidents
Consider New, Similar Payment
2026 GMC Sierra 3500
Pro
6 mi
64,452
Advertisement
Used
2024 GMC Sierra 3500
SLT
18K mi
67,988
See payment
Great Price
No Accidents
Used
2024 GMC Sierra 3500
SLT
59K mi
62,099
See payment
Great Price
No Accidents
Used
2025 GMC Sierra 3500
SLT
34K mi
65,989
See payment
Great Price
No Accidents
Used
2024 GMC Sierra 3500
SLT
23K mi
68,693
See payment
Great Price
No Accidents
Certified
2026 GMC Sierra 3500
SLT
355 mi
79,599
See payment
No Accidents
Advertisement
Used
2022 GMC Sierra 3500
SLT
80K mi
53,970
See payment
Good Price
No Accidents
Used
2025 GMC Sierra 3500
SLT
16K mi
64,405
See payment
No Accidents
Used
2020 GMC Sierra 3500
SLT
68K mi
53,986
See payment
No Accidents
Used
2018 GMC Sierra 3500
SLT
130K mi
41,700
See payment
Newly Listed
Used
2017 GMC Sierra 3500
SLT
161K mi
Contact Dealer For Price
See payment
No Accidents
Similar Vehicles for Sale
Used 2023 GMC Sierra 3500 SLT for Sale
Used 2026 GMC Sierra 3500 SLT for Sale
1 for sale
Used 2024 GMC Sierra 3500 SLT for Sale
4 for sale
Used 2025 GMC Sierra 3500 SLT for Sale
2 for sale
View All Similar Vehicles
Used GMC Sierra 3500 SLT in Nearby Cities
Used GMC Sierra 3500 SLT For Sale in Denver
11 for sale
Used GMC Sierra 3500 SLT For Sale in Aurora
11 for sale
Used GMC Sierra 3500 SLT For Sale in Fort Collins
6 for sale
Used GMC Sierra 3500 SLT For Sale in Colorado Springs
5 for sale
Used GMC Sierra 3500 SLT For Sale in Pueblo
4 for sale
View All Cities
<!--{"relevance":[false,{"relevanceVersion":"default"}]}-->
Learn more
