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319 listings
- Price Drop$56,999great price$5,028 below market
- 70,161 miles
- 6'10” bed, 6.6l, 8cyl
- 42 mi away
- Home delivery*
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Located in Centennial, CO / 42 miles away from Longmont, CO
Engine; Duramax 6.6L Turbo-Diesel V8; B20-Diesel CompatibleDenali Black Diamond EditionDenali Ultimate PackageTechnology PackageAssist Steps; Powe...
- Vehicle History:
- No accidents, 1 owner, personal use only
- Listing Information:
- VIN:
- 1GT49REY4PF202468
- Stock:
- PF202468
- Certified Pre-Owned:
- No
- Listed since:
- 04-30-2026
- Price Drop$54,890great price$3,819 below market
- 43,002 miles
- 8'2” bed, 6.6l, 8cyl
- 31 mi away
- Home delivery*
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Located in Golden, CO / 31 miles away from Longmont, CO
Engine; Duramax 6.6L Turbo-Diesel V8; B20-Diesel CompatibleDenali Ultimate PackageTechnology PackageSunroof; PowerGooseneck / 5Th Wheel PackageSu...
- Vehicle History:
- No accidents, 3 owners, personal use only
- Listing Information:
- VIN:
- 1GT49REY6LF198594
- Stock:
- LF198594
- Certified Pre-Owned:
- No
- Listed since:
- 04-30-2026
- $39,975great price$7,440 below market
- 95,019 miles
- 6'10” bed, 6.6l, 8cyl
- 17 mi away
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Located in Loveland, CO / 17 miles away from Longmont, CO
This 2022 GMC Sierra 2500HD SLT in Cardinal Red delivers heavy-duty capability with premium comfort, powered by a proven 6.6L V8 paired with a 6-speed...
- Vehicle History:
- No accidents, 1 owner, personal use only
- Listing Information:
- VIN:
- 1GT49NE76NF179854
- Stock:
- JV179854
- Certified Pre-Owned:
- No
- Listed since:
- 02-12-2026
- $47,990great price$3,461 below market
- 141,575 miles
- 6'10” bed, 6.6l, 8cyl
- 21 mi away
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Located in Northglenn, CO / 21 miles away from Longmont, CO
Experience the unparalleled power and capability of the 2023 GMC Sierra 2500HD Denali. This exceptional heavy-duty pickup is designed to conquer any c...
- Vehicle History:
- No accidents, 2 owners, personal use
- Listing Information:
- VIN:
- 1GT49REY5PF105585
- Stock:
- MP7188A
- Certified Pre-Owned:
- No
- Listed since:
- 05-14-2026
- $45,499great price$4,382 below market
- 77,350 miles
- 6'7” bed, 6.6l, 8cyl
- 26 mi away
- Home delivery*
Close
Located in Wheat Ridge, CO / 26 miles away from Longmont, CO
2019 GMC Sierra 3500HD Denali 4WD Duramax Diesel Allison Transmission Luxury Meets Capability Stock #34321A VIN: 1GT12SEY6KF229338 dyeautos.com ...
- Vehicle History:
- 4 accidents, 2 owners, corporate fleet vehicle
- Listing Information:
- VIN:
- 1GT12SEY6KF229338
- Stock:
- 34321A
- Certified Pre-Owned:
- No
- Listed since:
- 07-19-2025
- $37,799good price$4,013 below market
- 139,864 miles
- 8'2” bed, 6.6l, 8cyl
- 6 mi away
Close
Located in Longmont, CO / 6 miles away from Longmont, CO
LONG BED DURAMAX DIESEL 4X4!! Please call Reds Auto and Truck at 303-726-5520. We are a proud member of CUDL and have access to many Credit unions at...
- Vehicle History:
- No accidents, 1 owner, personal use
- Listing Information:
- VIN:
- 1GT19LEY6NF241138
- Stock:
- 2026-115
- Certified Pre-Owned:
- No
- Listed since:
- 03-19-2026
- Price Drop$69,999good price$4,730 below market
- 45,445 miles
- 6'10” bed, 6.6l, 8cyl
- 39 mi away
- Home delivery*
Close
Located in Littleton, CO / 39 miles away from Longmont, CO
The following items have been reconditioned on this vehicle: all new tires! Engine; Duramax 6.6L Turbo-Diesel V8; B20-Diesel CompatibleAt4 Premium...
- Vehicle History:
- No accidents, 1 owner, personal use only
- Listing Information:
- VIN:
- 1GT49PEY2RF234584
- Stock:
- RF234584
- Certified Pre-Owned:
- No
- Listed since:
- 05-12-2026
- $69,997good price$3,240 below market
- 24,600 miles
- 6'10” bed, 6.6l, 8cyl
- 17 mi away
Close
Located in Loveland, CO / 17 miles away from Longmont, CO
This 2024 GMC Sierra 2500HD Denali in Onyx Black pairs commanding Duramax 6.6L V8 turbodiesel power with a smooth 10-speed automatic transmission and ...
- Vehicle History:
- No accidents, personal use only
- Listing Information:
- VIN:
- 1GT49REY2RF445750
- Stock:
- JV445750
- Certified Pre-Owned:
- No
- Listed since:
- 02-12-2026
- $79,991good price$4,388 below market
- 25,050 miles
- 6'10” bed, 6.6l, 8cyl
- 42 mi away
Close
Located in Highlands Ranch, CO / 42 miles away from Longmont, CO
Discover the ultimate in rugged capability and premium comfort with the 2024 GMC Sierra 2500HD AT4X. This powerful truck is engineered to conquer any ...
- Vehicle History:
- No accidents, personal use only
- Listing Information:
- VIN:
- 1GT49ZEY9RF310085
- Stock:
- KM310085
- Certified Pre-Owned:
- No
- Listed since:
- 05-13-2026
- $80,695good price$3,399 below market
- 26,734 miles
- 6'10” bed, 6.6l, 8cyl
- 42 mi away
Close
Located in Highlands Ranch, CO / 42 miles away from Longmont, CO
Experience the pinnacle of power and capability with the 2024 GMC Sierra 2500HD AT4X in Thunderstorm Gray. This exceptional heavy-duty truck is engine...
- Vehicle History:
- No accidents, personal use only
- Listing Information:
- VIN:
- 1GT49ZEY8RF439712
- Stock:
- KM439712
- Certified Pre-Owned:
- No
- Listed since:
- 03-10-2026
- Price Drop$33,899great price$2,646 below market
- 165,020 miles
- 6'7” bed, 6.6l, 8cyl
- 42 mi away
- Home delivery*
Close
Located in Centennial, CO / 42 miles away from Longmont, CO
Duramax Plus PackageLeather SeatsRed Quartz TintcoatNavigation SystemGooseneck / 5Th Wheel Prep PackageMirrors; Chrome; Outside Heated Power-Adju...
- Vehicle History:
- 2 accidents, 2 owners, personal use only
- Listing Information:
- VIN:
- 1GT12UEY9JF214973
- Stock:
- JF214973
- Certified Pre-Owned:
- No
- Listed since:
- 03-25-2026
- $79,295good price$3,435 below market
- 35,079 miles
- 6'10” bed, 6.6l, 8cyl
- 42 mi away
Close
Located in Highlands Ranch, CO / 42 miles away from Longmont, CO
Discover the ultimate in power, capability, and premium comfort with the 2024 GMC Sierra 2500HD AT4X. This exceptional heavy-duty pickup is engineered...
- Vehicle History:
- No accidents, personal use only
- Listing Information:
- VIN:
- 1GT49ZEY5RF460047
- Stock:
- JV460047
- Certified Pre-Owned:
- No
- Listed since:
- 04-02-2026
- Price Drop$64,199fair price$2,236 below market
- 16,614 miles
- 6'10” bed, 6.6l, 8cyl
- 37 mi away
- Home delivery*
Close
Located in Littleton, CO / 37 miles away from Longmont, CO
Engine; Duramax 6.6L Turbo-Diesel V8; B20-Diesel CompatibleLpo; 20" (50.8 Cm) High Gloss Black Painted WheelsAt4 Preferred PackageSunroof; PowerDr...
- Vehicle History:
- No accidents, 1 owner, personal use only
- Listing Information:
- VIN:
- 1GT49PEY7PF177876
- Stock:
- PF177876
- Certified Pre-Owned:
- No
- Listed since:
- 05-18-2026
- Price Drop$48,111fair price$90 below market
- 95,471 miles
- 6'7” bed, 6.6l, 8cyl
- 17 mi away
Close
Located in Broomfield, CO / 17 miles away from Longmont, CO
Rare opportunity to own this 2018 GMC Sierra 2500HD Denali. This vehicle is equipped with a powerful Duramax 6.6L V8 Turbodiesel engine paired with an...
- Vehicle History:
- No accidents, 2 owners, personal use only
- Listing Information:
- VIN:
- 1GT12UEY5JF290514
- Stock:
- P3073A
- Certified Pre-Owned:
- No
- Listed since:
- 05-05-2026
- $79,988fair price$87 above market
- 25,437 miles
- 6'10” bed, 6.6l, 8cyl
- 26 mi away
Close
Located in Fort Collins, CO / 26 miles away from Longmont, CO
Please contact our Internet Sales Team at 970-282-6838Experience the pinnacle of power and sophistication with the 2024 GMC Sierra 2500HD Denali Ultim...
- Vehicle History:
- No accidents, 1 owner, personal use only
- Listing Information:
- VIN:
- 1GT49XEY7RF454271
- Stock:
- H263973A
- Certified Pre-Owned:
- No
- Listed since:
- 05-02-2026
- $18,999great price$3,498 below market
- 205,727 miles
- 6'7” bed, 6.6l, 8cyl
- 35 mi away
Close
Located in Denver, CO / 35 miles away from Longmont, CO
- Vehicle History:
- 1 accident, 2 owners, personal use only
- Listing Information:
- VIN:
- 1GT121C82EF115936
- Stock:
- 115936
- Certified Pre-Owned:
- No
- $82,991fair price$96 below market
- 14,477 miles
- 6'10” bed, 6.6l, 8cyl
- 42 mi away
Close
Located in Highlands Ranch, CO / 42 miles away from Longmont, CO
Experience the uncompromising capability of the 2024 GMC Sierra 2500HD AT4X. Engineered to conquer the toughest terrain, this heavy-duty pickup is equ...
- Vehicle History:
- No accidents, 2 owners, personal use only
- Listing Information:
- VIN:
- 1GT49ZEY5RF443796
- Stock:
- 443796T
- Certified Pre-Owned:
- No
- Listed since:
- 05-23-2026
- $71,787good price$2,751 below market
- 30,532 miles
- 6'10” bed, 6.6l, 8cyl
- 21 mi away
Close
Located in Denver, CO / 21 miles away from Longmont, CO
Experience the O'Meara Advantage. O’Meara offers a wide range of vehicles at competitive prices, and our knowledgeable staff is dedicated to helping c...
- Vehicle History:
- No accidents, 1 owner, personal use only
- Listing Information:
- VIN:
- 1GT49REYXRF427318
- Stock:
- 8402GA
- Certified Pre-Owned:
- No
- Listed since:
- 05-23-2026
- Price Drop$48,888fair price$49 below market
- 87,077 miles
- 6'10” bed, 6.6l, 8cyl
- 43 mi away
- Home delivery*
Close
Located in Lone Tree, CO / 43 miles away from Longmont, CO
Denali Ultimate PackageTechnology PackageSunroof; PowerSun/MoonroofLeather SeatsOnyx BlackNavigation SystemKeyless StartTrailer Tire Pressure ...
- Vehicle History:
- No accidents, 1 owner, personal use only
- Listing Information:
- VIN:
- 1GT49RE71NF174455
- Stock:
- NF174455
- Certified Pre-Owned:
- No
- Listed since:
- 04-22-2026
- $41,984fair price$1,041 below market
- 133,940 miles
- 6'7” bed, 6.6l, 8cyl
- 27 mi away
Close
Located in Greeley, CO / 27 miles away from Longmont, CO
2018 GMC Sierra 2500 HD Denali: The Ultimate Family PickupIf your family is looking for a pickup that really does it all, this 2018 GMC Sierra 2500 ...
- Vehicle History:
- No accidents, 2 owners, personal use only
- Listing Information:
- VIN:
- 1GT12UEY2JF213177
- Stock:
- N12209T
- Certified Pre-Owned:
- No
- Listed since:
- 05-09-2026
- Price Drop$38,998fair price$1,069 below market
- 145,976 miles
- 6'7” bed, 6.6l, 8cyl
- 42 mi away
- Home delivery*
Close
Located in Centennial, CO / 42 miles away from Longmont, CO
Duramax Plus PackageLeather SeatsQuicksilver MetallicNavigation SystemMirrors; Outside Heated Power-Adjustable Vertical Trailering; Memory Equippe...
- Vehicle History:
- No accidents, 1 owner, personal use only
- Listing Information:
- VIN:
- 1GT12SEY7KF133119
- Stock:
- KF133119
- Certified Pre-Owned:
- No
- Listed since:
- 02-23-2026
Showing 1 - 21 out of 319 listings
* Delivery of any kind does not apply to Alaska and Hawaii. Contact the dealer for delivery details, restrictions and costs.