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129 listings
- $82,998great price$7,494 below market
- 14,385 miles
- No accidents, 1 owner, personal use only
- 6'10” bed, 6.6l, 8cyl
- Castle Rock Chevrolet GMC (89 mi away)
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Located in Castle Rock, CO / 89 miles away from Fort Collins, CO
10-Speed Automatic, 4WD, Alpine Umber Leather, 120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 2 Charge-Only Rear USB Ports...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49YEY5RF345457
Stock: RF345457A
Certified Pre-Owned: Yes
Listed since: 06-11-2025 - New Listing$74,799fair price$2,828 below market
- 25,543 miles
- No accidents, 1 owner, personal use only
- 8'2” bed, 6.6l, 8cyl
- AutoNation Ford Littleton (74 mi away)
- Home delivery*
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Located in Littleton, CO / 74 miles away from Fort Collins, CO
Engine; Duramax 6.6L Turbo-Diesel V8; B20-Diesel CompatibleAt4 Premium Plus PackageAssist Steps; Power-Retractable; BlackTechnology PackageSunroof...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49VEY0RF249153
Stock: RF249153
Certified Pre-Owned: No
Listed since: 07-29-2025 - $77,786fair price$350 below market
- 12,987 miles
- No accidents, 1 owner, personal use only
- 6'10” bed, 6.6l, 8cyl
- ClearShift (74 mi away)
Close
Located in Highlands Ranch, CO / 74 miles away from Fort Collins, CO
The 2024 GMC Sierra 3500HD Denali in Onyx Black is a commanding 4WD heavy-duty truck powered by the legendary Duramax 6.6L V8 Turbodiesel mated to a 1...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49WEY9RF400755
Stock: JV400755
Certified Pre-Owned: No
Listed since: 07-16-2025 - $77,796fair price$198 below market
- 13,829 miles
- No accidents, 1 owner, personal use only
- 6'10” bed, 6.6l, 8cyl
- ClearShift (74 mi away)
Close
Located in Highlands Ranch, CO / 74 miles away from Fort Collins, CO
The 2024 GMC Sierra 3500HD Denali 4WD in Onyx Black delivers uncompromising power, luxury, and off-road capability with its proven Duramax 6.6L V8 Tur...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49WEY6RF397250
Stock: JV397250
Certified Pre-Owned: No
Listed since: 07-17-2025 - Price Drop$72,986fair price$1,198 below market
- 30,779 miles
- No accidents, 1 owner, personal use only
- 6'10” bed, 6.6l, 8cyl
- ClearShift (74 mi away)
Close
Located in Highlands Ranch, CO / 74 miles away from Fort Collins, CO
The 2024 GMC Sierra 3500HD AT4 is built for those who need exceptional capability and rugged performance. Powered by a 6.6L V8 engine, paired with a 1...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49VEY0RF333800
Stock: KM333800
Certified Pre-Owned: No
Listed since: 03-27-2025 - 11,099 miles
- No accidents, 1 owner, personal use only
- 6'10” bed, 6.6l, 8cyl
- ClearShift (74 mi away)
Close
Located in Highlands Ranch, CO / 74 miles away from Fort Collins, CO
2024 GMC Sierra 3500HD SLE 4WD in Summit White powered by the legendary 6.6L Duramax V8 Turbodiesel paired with a 10-speed automatic transmission. Thi...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49TEY7RF125210
Stock: KM125210
Certified Pre-Owned: No
Listed since: 06-26-2025- $74,995fair price$657 above market
- 29,957 miles
- No accidents, personal use only
- 6'10” bed, 6.6l, 8cyl
- ClearShift (74 mi away)
Close
Located in Highlands Ranch, CO / 74 miles away from Fort Collins, CO
The 2024 GMC Sierra 3500HD AT4 in Onyx Black is a bold 4WD heavy-duty truck driven by the powerful Duramax 6.6L V8 Turbodiesel paired with a 10-speed ...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49VEY3RF213702
Stock: JV213702
Certified Pre-Owned: No
Listed since: 07-16-2025 - Price Drop
- 28,598 miles
- No accidents, 1 owner, personal use only
- 8'2” bed, 6.6l, 8cyl
- AutoNation Buick GMC Park Meadows (74 mi away)
- Home delivery*
Close
Located in Lone Tree, CO / 74 miles away from Fort Collins, CO
Lpo; Body Color Wheel Arch MoldingsSun/MoonroofLeather SeatsOnyx BlackNavigation SystemHigh Idle SwitchKeyless StartHeads-Up DisplayCooled Fro...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49YEY0RF241975
Stock: RF241975
Certified Pre-Owned: No
Listed since: 04-02-2025 - 6,207 miles
- No accidents, 1 owner, personal use only
- Johnson Auto Plaza (49 mi away)
Close
Located in Brighton, CO / 49 miles away from Fort Collins, CO
**Accident-Free Carfax, 1-Owner** **GM Certified Pre-Owned** **Sierra 3500 Denali Crew Cab 4WD** *Dual Rear Wheel* *6.6L Duramax Turbo Diesel* *Denali...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49WEY6RF122316
Stock: 15839Z
Certified Pre-Owned: Yes
Listed since: 07-31-2025- Price Drop
- 16,186 miles
- No accidents, 1 owner, personal use only
- 6'10” bed, 6.6l, 8cyl
- Grand Valley Auto Lakewood (63 mi away)
Close
Located in Lakewood, CO / 63 miles away from Fort Collins, CO
Recent Arrival! 120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 2 Charge-Only Rear USB Ports, 2 Charge/Data USB Ports Insid...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49WEY5RF384554
Stock: G6254T
Certified Pre-Owned: No
Listed since: 07-24-2025 - Price Drop
- 31,370 miles
- No accidents, 1 owner, personal use
- 8'2” bed, 6.6l, 8cyl
- Fremont Motor Casper (164 mi away)
Close
Located in Casper, WY / 164 miles away from Fort Collins, CO
Certified. Summit White 2024 GMC Sierra 3500HD SLT 4WD 10-Speed Automatic 6.6L V8 Well Maintained Badge, Carfax One Owner, Clean Carfax No Accident, 1...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49UE72RF125452
Stock: 1M25191
Certified Pre-Owned: No
Listed since: 07-07-2025 - Price Drop
- 36,499 miles
- No accidents, 1 owner, personal use only
- AutoNation Ford Arapahoe (72 mi away)
Close
Located in Centennial, CO / 72 miles away from Fort Collins, CO
Engine; Duramax 6.6L Turbo-Diesel V8; B20-Diesel CompatibleLeather SeatsNavigation SystemKeyless StartCooled Front Seat(S)Thank you for your in...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49WEYXRF229787
Stock: RF229787
Certified Pre-Owned: No
Listed since: 04-24-2025 - $49,995great price$4,502 below market
- 47,571 miles
- No accidents, 1 owner, personal use
- 8'2” bed, 6.6l, 8cyl
- Eagle Chevrolet (184 mi away)
Close
Located in Chadron, NE / 184 miles away from Fort Collins, CO
Vehicle Details For sale: a robust 2023 GMC Sierra 3500 SLE with only 47,571 miles. This powerful truck is equipped with a reliable 4WD system, ensuri...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49TEY4PF143595
Stock: P2438
Certified Pre-Owned: No
Listed since: 07-10-2025 - New Listing$94,000good price$5,470 below market
- 3,106 miles
- No accidents, 1 owner, personal use only
- 6'10” bed, 6.6l, 8cyl
- AutoNation Chevrolet North (56 mi away)
- Home delivery*
Close
Located in Denver, CO / 56 miles away from Fort Collins, CO
Lpo; Body Color Wheel Arch MoldingsSun/MoonroofGooseneck / 5Th Wheel Prep PackageLeather SeatsOnyx BlackNavigation SystemLpo; All-Weather Floor ...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT4UYEY3SF257236
Stock: SF257236
Certified Pre-Owned: No
Listed since: 08-05-2025 - $92,888fair price$3,324 below market
- 9,227 miles
- No accidents, 1 owner, personal use only
- 6'10” bed, 6.6l, 8cyl
- AutoNation Buick GMC Park Meadows (74 mi away)
- Home delivery*
Close
Located in Lone Tree, CO / 74 miles away from Fort Collins, CO
Sun/MoonroofGooseneck / 5Th Wheel Prep PackageLeather SeatsDownpour MetallicNavigation SystemLpo; Hitch PackagePremium Floor Liners With Removab...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT4UYEY1SF188241
Stock: SF188241
Certified Pre-Owned: No
Listed since: 06-11-2025 - $67,990fair price$482 below market
- 36,111 miles
- No accidents, 2 owners, personal use only
- 6'10” bed, 6.6l, 8cyl
- AutoNation Chrysler Jeep West (63 mi away)
- Home delivery*
Close
Located in Golden, CO / 63 miles away from Fort Collins, CO
Engine; Duramax 6.6L Turbo-Diesel V8; B20-Diesel CompatibleAssist Steps; Power-RetractableSunroof; PowerSun/MoonroofGooseneck / 5Th Wheel Prep Pac...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49WEYXPF162122
Stock: PF162122
Certified Pre-Owned: No
Listed since: 07-26-2025 - Price Drop$48,000good price$740 below market
- 64,798 miles
- 1 accident, 1 owner, personal use only
- 8'2” bed, 6.6l, 8cyl
- Larry H. Miller Ford Lakewood (63 mi away)
- Home delivery*
Close
Located in Lakewood, CO / 63 miles away from Fort Collins, CO
Summit White 2023 GMC Sierra 3500HD Pro 4WD 10-Speed Automatic Duramax 6.6L V8 Turbodiesel. POWER EQUIPMENT GROUP, TRAILER TOW MIRRORS, REAR CAMERA, T...
AutoCheck Vehicle History Summary
Accident Free Vehicle: No
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: Yes
Features and Specs:
Listing Information:
VIN: 1GT49SEY1PF179061
Stock: LFO241644B
Certified Pre-Owned: No
Listed since: 07-03-2025 - $54,989fair price$301 below market
- 89,847 miles
- No accidents, 1 owner, personal use only
- 6'10” bed, 6.6l, 8cyl
- ClearShift (74 mi away)
Close
Located in Highlands Ranch, CO / 74 miles away from Fort Collins, CO
The 2023 GMC Sierra 3500HD AT4 4WD in Pacific Blue Metallic is a heavy-duty, off-road-capable truck powered by the renowned 6.6L Duramax V8 Turbodiese...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49VEY6PF117771
Stock: KM117771
Certified Pre-Owned: No
Listed since: 07-09-2025 - Price Drop
- 16,978 miles
- No accidents, personal use only
- Castle Rock Chevrolet GMC (89 mi away)
Close
Located in Castle Rock, CO / 89 miles away from Fort Collins, CO
Sierra 3500HD Denali, 10-Speed Automatic, 4WD, Black Leather, 2 Charge/Data USB Ports Inside Center Console, ABS brakes, Alloy wheels, AM/FM radio: Si...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT4UWEY2SF143653
Stock: SF143653A
Certified Pre-Owned: Yes
Listed since: 07-02-2025 - Price Drop$47,384fair price$363 above market
- 77,542 miles
- No accidents, 1 owner, personal use only
- 8'2” bed, 6.6l, 8cyl
- Ken Garff Ford Greeley (23 mi away)
Close
Located in Greeley, CO / 23 miles away from Fort Collins, CO
Ford Blue Advantage Blue Certified, 10-Speed Automatic, 4WD, Black Cloth, 2-Speed Electronic Shift Transfer Case, 220 Amp Alternator, 3 Years of OnSta...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49SEY7PF203881
Stock: PF203881P
Certified Pre-Owned: No
Listed since: 06-11-2025 - $58,995fair price$1,866 above market
- 18,038 miles
- No accidents, corporate fleet vehicle
- 8'2” bed, 6.6l, 8cyl
- Eagle Chevrolet (184 mi away)
Close
Located in Chadron, NE / 184 miles away from Fort Collins, CO
Vehicle Details Unleash the power and capability of the impressive 2023 GMC Sierra 3500 SLE, now available with only 18,038 miles! This robust truck i...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: No
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
Listing Information:
VIN: 1GT49TEY1PF197159
Stock: P2372
Certified Pre-Owned: No
Listed since: 04-17-2025
Showing 1 - 21 out of 129 listings
Consumer Reviews for the GMC Sierra 3500HD
Read recent reviews for the GMC Sierra 3500HD
WHAT A TRUCK
Bill S., 04/05/2020
2020 GMC Sierra 3500HD Denali 4dr Crew Cab 4WD SB (6.6L 8cyl 6A)
I purchased this Denali two weeks ago. I absolutely love this truck. The ride is so smooth and power band is incredible. What a huge difference between my 2008 GMC 2500HD Duramax, its like night and day... I love all the high tech features with the 2020's from the cameras to the front and rear LED lighting. Oh yea forgot about that first of its kind tailgate. Now that's a very … useful tailgate, I can see Ford, Dodge and Chevrolet using the same basic tailgate in the near future.
I really cant wait to haul my 5th wheel with this truck. Once I make that first trip I will update this review regarding the towing...
A big thank you for Thompsons GMC in Placerville, CA for such a great purchasing experience.
It’s been about a year since I purchased my GMC 3500 Denali and wanted to update my review.
I still love this truck so much. I’ve towed my 5th wheel RV approximately 8000K miles. This truck tows my 5th wheel like a dream. The cooling system is definitely a 100% improvement over my 2008 while towing in the warmer weather.
About the only thing I’d like to see is GM add more information to the heads up display (HUD) like your blind spot indicators.
I’m glad we bought when we did because I hear that dealers are having a tough time receiving new trucks.
Bottom line is this, I’d buy this truck all over again absolutely No Regrets!!!!
Used 2024 GMC Sierra 3500HD in Fort Collins, CO Values
Estimated values
2024 GMC Sierra 3500HD Denali Ultimate 4dr Crew Cab 4WD SB (6.6L 8cyl Turbodiesel 10A) with no options
| Condition | Trade-In | Private Party | Dealer Retail |
|---|---|---|---|
| Outstanding | $65,016 | $69,609 | $75,199 |
| Clean | $64,310 | $68,733 | $74,123 |
| Average | $63,133 | $67,271 | $72,329 |
| Rough | $61,603 | $65,372 | $69,998 |
The average list price of a used 2024 GMC Sierra 3500HD in Fort Collins, Colorado is $71,229. The average mileage on a used GMC Sierra 3500HD 2024 for sale in Fort Collins, Colorado is 29,555. Based on the average mileage of 29,555 for used 2024 GMC Sierra 3500HD for sale in Fort Collins, CO and using an average vehicle condition rating, which means the vehicle may have a few mechanical and/or cosmetic problems and may require a considerable amount of reconditioning, we appraise the average trade-in value of a used GMC Sierra 3500HD 2024 in Fort Collins, Colorado to be $63,133.
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