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1,475 listings
- Price Drop$39,000good price$4,153 below market
- 56,070 miles
- No accidents, 1 owner, personal use only
- 5'10” bed, 5.3l, 8cyl
- McDonald Hyundai (74 mi away)
- Home delivery*
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Located in Highlands Ranch, CO / 74 miles away from Fort Collins, CO
CARFAX One-Owner. Clean CARFAX. 2021 GMC Sierra 1500 SLT 4WD ** SLT PREMIUM PLUS PACKAGE ** $7145 OPTION ** X31 OFF ROAD PACKAGE ** LANE KEEP ASSIST *...
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:
19 Combined MPG (16 City/22 Highway)
Listing Information:
VIN: 3GTU9DED7MG254431
Stock: HPMG254431
Certified Pre-Owned: No
Listed since: 06-18-2025 - Price Drop$42,395good price$5,092 below market
- 69,469 miles
- No accidents, 1 owner, personal use only
- 5'10” bed, 6.2l, 8cyl
- Driveway (159 mi away)
- Home delivery*
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Located in Casper, WY / 159 miles away from Fort Collins, CO
CarFax No Accidents Reported,CarFax 1-Owner,Apple CarPlay,Back-Up Camera,Blind Spot Monitor,Bluetooth,Heads-Up Display,Heated Seats,Heated Steering Wh...
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: 1GTP9EEL3MZ198904
Stock: 8610CF
Certified Pre-Owned: No - $44,971fair price$131 below market
- 46,830 miles
- No accidents, 1 owner, personal use only
- 5'10” bed, 5.3l, 8cyl
- ClearShift Loveland (16 mi away)
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Located in Loveland, CO / 16 miles away from Fort Collins, CO
2021 GMC Sierra 1500 Denali with the 5.3L V8 engine and Driver Alert Package I, offering a premium full-size truck experience with advanced safety and...
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:
19 Combined MPG (16 City/22 Highway)
Listing Information:
VIN: 1GTU9FED9MZ186838
Stock: KM186838
Certified Pre-Owned: No
Listed since: 06-26-2025 - New Listing$44,597fair price$1,047 below market
- 25,618 miles
- No accidents, 4 owners, personal use only
- 5'10” bed, 5.3l, 8cyl
- EchoPark Automotive Denver (Thornton) (52 mi away)
- Five Star Dealer
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Located in Thornton, CO / 52 miles away from Fort Collins, CO
At EchoPark, it’s all about offering you options for a happy experience. We have thousands of new-to-you makes and models that range from sedans to tr...
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:
19 Combined MPG (16 City/22 Highway)
Listing Information:
VIN: 3GTU9DEDXMG223982
Stock: PMG223982
Certified Pre-Owned: No
Listed since: 07-20-2025 - Price Drop$37,998fair price$2,110 below market
- 100,010 miles
- 2 accidents, 2 owners, personal use only
- 5'10” bed, 3l, 6cyl
- CarMax Loveland (15 mi away)
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Located in Loveland, CO / 15 miles away from Fort Collins, CO
CarMax values transparency and wants you to love your next car, not settle on it. Certain vehicles may have unrepaired safety recalls. Check nhtsa.gov...
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: 3GTU9FETXMG290116
Stock: 27085215
Certified Pre-Owned: No - New Listing$44,998fair price$1,018 above market
- 40,223 miles
- No accidents, 2 owners, personal use only
- 5'10” bed, 5.3l, 8cyl
- CarMax West 104th Ave (52 mi away)
Close
Located in Federal Heights, CO / 52 miles away from Fort Collins, CO
CarMax values transparency and wants you to love your next car, not settle on it. Certain vehicles may have unrepaired safety recalls. Check nhtsa.gov...
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: Yes
Features and Specs:
18 Combined MPG (16 City/21 Highway)
Listing Information:
VIN: 3GTP9EEDXMG184328
Stock: 26514883
Certified Pre-Owned: No - $38,999fair price$817 above market
- 63,686 miles
- No accidents, 2 owners, personal use only
- 5'10” bed, 3l, 6cyl
- Reds Auto and Truck (33 mi away)
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Located in Longmont, CO / 33 miles away from Fort Collins, CO
Red's is pleased to present this 2021 GMC Sierra 1500 Elevation! This sweet Sierra comes equipped with a 3.0L Duramax Turbo Diesel engine under the ho...
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: 3GTU9CET0MG288356
Stock: 2025-071
Certified Pre-Owned: No
Listed since: 03-13-2025 - Price Drop$42,499fair price$1,776 above market
- 57,205 miles
- 1 accident, 2 owners, personal use only
- 5'10” bed, 6.2l, 8cyl
- AutoNation Dodge Ram Colorado Springs (118 mi away)
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Located in Colorado Springs, CO / 118 miles away from Fort Collins, CO
Engine; 6.2L Ecotec3 V8Lpo; Sport Step; BlackWheels; 20" X 9" (50.8 Cm X 22.9 Cm) Machined Aluminum With Carbon Grey Metallic AccentsLeather Seats...
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: No
Features and Specs:
Listing Information:
VIN: 3GTP9EEL2MG446673
Stock: MG446673
Certified Pre-Owned: No
Listed since: 06-16-2025 - $47,795fair price$588 above market
- 42,012 miles
- No accidents, 1 owner, personal use only
- 6'7” bed, 6.2l, 8cyl
- ClearShift (74 mi away)
Close
Located in Highlands Ranch, CO / 74 miles away from Fort Collins, CO
Experience premium performance and refined luxury in this 2021 GMC Sierra 1500 Denali 4WD, powered by the robust 6.2L V8 engine. This top-tier 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:
19 Combined MPG (16 City/22 Highway)
Listing Information:
VIN: 1GTU9FEL4MZ127574
Stock: KM127574
Certified Pre-Owned: No
Listed since: 05-15-2025 - New Listing$41,998fair price$368 above market
- 84,951 miles
- No accidents, 1 owner, personal use only
- 5'10” bed, 6.2l, 8cyl
- CarMax Golden (63 mi away)
Close
Located in Golden, CO / 63 miles away from Fort Collins, CO
CarMax values transparency and wants you to love your next car, not settle on it. Certain vehicles may have unrepaired safety recalls. Check nhtsa.gov...
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: 3GTP9EEL7MG306022
Stock: 26868569
Certified Pre-Owned: No - Price Drop$49,998fair price$690 above market
- 45,105 miles
- No accidents, 3 owners, personal use only
- 5'10” bed, 3l, 6cyl
- CarMax Colorado Springs (122 mi away)
Close
Located in Colorado Springs, CO / 122 miles away from Fort Collins, CO
CarMax values transparency and wants you to love your next car, not settle on it. Certain vehicles may have unrepaired safety recalls. Check nhtsa.gov...
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: Yes
Features and Specs:
Listing Information:
VIN: 3GTU9FET2MG282804
Stock: 27415520
Certified Pre-Owned: No - $35,889fair price$1,373 above market
- 102,357 miles
- No accidents, 2 owners, personal use
- 5'10” bed, 6.2l, 8cyl
- Johnson Auto Plaza (49 mi away)
Close
Located in Brighton, CO / 49 miles away from Fort Collins, CO
2021 GMC Sierra 1500 AT4 Satin Steel Metallic 4WD EcoTec3 6.2L V8 10-Speed Automatic10-Speed Automatic, 4WD, Jet Black With Kalahari Accents Leathe...
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: 1GTP9EEL2MZ436936
Stock: G528377A
Certified Pre-Owned: No
Listed since: 07-05-2025 - Price Drop$47,998fair price$1,736 above market
- 30,007 miles
- 1 accident, 1 owner, personal use only
- 6'7” bed, 6.2l, 8cyl
- CarMax Parker (77 mi away)
Close
Located in Parker, CO / 77 miles away from Fort Collins, CO
CarMax values transparency and wants you to love your next car, not settle on it. Certain vehicles may have unrepaired safety recalls. Check nhtsa.gov...
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: 1GTU9FEL0MZ445319
Stock: 27415558
Certified Pre-Owned: No - New Listing$39,995fair price$2,022 above market
- 54,188 miles
- No accidents, 1 owner, personal use
- 6'7” bed, 5.3l, 8cyl
- United Automotive (63 mi away)
Close
Located in Denver, CO / 63 miles away from Fort Collins, CO
• 4x4 • 5.3L V-8 Power • Crew Cab • Short Bed • Cloth Seating • Backup Camera • Bluetooth • Power Options • Keyless Entry • Remote S...
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:
19 Combined MPG (18 City/21 Highway)
Listing Information:
VIN: 1GTU9CED1MZ117804
Stock: 117804
Certified Pre-Owned: No
Listed since: 07-27-2025 - Price Drop$44,999fair price$1,521 above market
- 53,479 miles
- 1 accident, 2 owners, personal use
- 5'10” bed, 5.3l, 8cyl
- AutoNation Dodge Ram Colorado Springs (118 mi away)
Close
Located in Colorado Springs, CO / 118 miles away from Fort Collins, CO
Leather SeatsPacific Blue MetallicNavigation SystemKeyless StartCooled Front Seat(S)Engine; 5.3L Ecotec3 V8Jet Black; Forge Perforated Leather S...
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: No
Features and Specs:
19 Combined MPG (16 City/22 Highway)
Listing Information:
VIN: 1GTU9FED1MZ154076
Stock: MZ154076
Certified Pre-Owned: No
Listed since: 07-18-2025 - 23,772 miles
- No accidents, 2 owners, personal use only
- 6'7” bed, 5.3l, 8cyl
- CarMax West 104th Ave (52 mi away)
Close
Located in Federal Heights, CO / 52 miles away from Fort Collins, CO
CarMax values transparency and wants you to love your next car, not settle on it. Certain vehicles may have unrepaired safety recalls. Check nhtsa.gov...
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: Yes
Features and Specs:
19 Combined MPG (18 City/21 Highway)
Listing Information:
VIN: 1GTR9BED9MZ124662
Stock: 27596939
Certified Pre-Owned: No- New Listing
- 38,504 miles
- No accidents, 3 owners, personal use only
- 6'7” bed, 3l, 6cyl
- AutoNation USA Denver 104 (52 mi away)
Close
Located in Northglenn, CO / 52 miles away from Fort Collins, CO
Leather SeatsOnyx BlackEngine Block HeaterKeyless StartCooled Front Seat(S)At4 Preferred Equipment GroupAudio System; Premium Gmc Infotainment S...
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:
24 Combined MPG (22 City/26 Highway)
Listing Information:
VIN: 3GTU9EET3MG414446
Stock: MG414446
Certified Pre-Owned: No
Listed since: 07-17-2025 - Price Drop
- 32,306 miles
- No accidents, 1 owner, personal use only
- 5'10” bed, 3l, 6cyl
- Grand Valley Auto Lakewood (63 mi away)
Close
Located in Lakewood, CO / 63 miles away from Fort Collins, CO
Clean CARFAX. Priced below KBB Fair Purchase Price! Odometer is 39855 miles below market average! 22/26 City/Highway MPGCardinal Red 2021 GMC Sierra ...
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: 3GTU9CET0MG456027
Stock: G6061
Certified Pre-Owned: No
Listed since: 04-23-2025 - Price Drop
- 57,293 miles
- No accidents, personal use only
- 5'10” bed, 5.3l, 8cyl
- Castle Rock Chevrolet GMC (89 mi away)
Close
Located in Castle Rock, CO / 89 miles away from Fort Collins, CO
EcoTec3 5.3L V8, 10-Speed Automatic, 4WD, Cayenne Red, Black Leather, 10-Way Power Driver Seat Adjuster w/Lumbar, 10-Way Power Passenger Seat Adjuster...
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:
19 Combined MPG (16 City/22 Highway)
Listing Information:
VIN: 1GTU9DED7MZ304549
Stock: MZ304549A
Certified Pre-Owned: Yes
Listed since: 07-02-2025 - 52,752 miles
- No accidents, 1 owner, personal use only
- CarMax South Broadway (71 mi away)
Close
Located in Littleton, CO / 71 miles away from Fort Collins, CO
CarMax values transparency and wants you to love your next car, not settle on it. Certain vehicles may have unrepaired safety recalls. Check nhtsa.gov...
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: Yes
Features and Specs:
Listing Information:
VIN: 1GTU9EET3MZ393985
Stock: 26811014
Certified Pre-Owned: No- Not Priced
- 78,177 miles
- No accidents, 1 owner, personal use only
- 5'10” bed, 6.2l, 8cyl
- Herl Chevrolet GMC (198 mi away)
Close
Located in Goodland, KS / 198 miles away from Fort Collins, CO
This 2021 GMC Sierra 1500 Denali White Frost Tricoat with Dark Walnut/Dark Ash Grey interior has 78177 miles. No Accidents! One Owner! Preferred Equip...
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: 3GTU9FEL1MG446902
Stock: MG446902
Certified Pre-Owned: No
Listed since: 04-30-2024
Showing 1 - 21 out of 1,475 listings
Consumer Reviews for the GMC Sierra 1500
Read recent reviews for the GMC Sierra 1500
Valve lifter problem
Rod, 09/02/2021
2021 GMC Sierra 1500 SLT 4dr Crew Cab 4WD 5.8 ft. SB (5.3L 8cyl 10A)
I have a 2021 GMC 5.3L w/10spd transmission. I pull a 21’ cargo trailer w/2 Polaris Trail Rzr’s. Yesterday at 13,800 miles the valve lifter on #5 cylinder went out. We were 80 miles from home in the middle of no-where. We limped home.
The truck is beautiful, pulls great and gets good mileage, but GM should let customers know about this kind of potential problem.
The dealer told me … today that it could take a month to get parts and get it fixed. I need the truck almost every day, but now I walk for a month! NOT HAPPY! I’ve been a GMC customer for 35 years and bought north of 17 new pickups. Never had this problem. When this is fixed I will have to look at other brands.
Used 2021 GMC Sierra 1500 in Fort Collins, CO Values
Estimated values
2021 GMC Sierra 1500 SLT 4dr Crew Cab 4WD 5.8 ft. SB (5.3L 8cyl 10A) with no options
| Condition | Trade-In | Private Party | Dealer Retail |
|---|---|---|---|
| Outstanding | $34,062 | $36,617 | $39,187 |
| Clean | $33,438 | $35,910 | $38,392 |
| Average | $32,399 | $34,733 | $37,068 |
| Rough | $31,048 | $33,202 | $35,346 |
The average list price of a used 2021 GMC Sierra 1500 in Fort Collins, Colorado is $42,951. The average mileage on a used GMC Sierra 1500 2021 for sale in Fort Collins, Colorado is 54,953. Based on the average mileage of 54,953 for used 2021 GMC Sierra 1500 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 1500 2021 in Fort Collins, Colorado to be $32,399.
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