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2,363 listings
- Price Drop$43,352great price$7,382 below market
- 58,201 miles
- No accidents, 1 owner, personal use
- 6'7” bed, 6.2l, 8cyl
- Hansen Chevrolet GMC (382 mi away)
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Located in Brigham City, UT / 382 miles away from Roundup, MT
CARFAX One-Owner. Clean CARFAX. Summit White 2021 GMC Sierra 1500 AT4 4WD 10-Speed Automatic EcoTec3 6.2L V8 10-Speed Automatic, 4WD, Jet Black With K...
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: 1GTP9EEL3MZ101555
Stock: 225383A
Certified Pre-Owned: No
Listed since: 07-09-2025 - $39,000great price$15,072 below market
- 48,621 miles
- No accidents, 1 owner, personal use only
- 5'10” bed, 6.2l, 8cyl
- Salt Lake Valley Buick GMC (429 mi away)
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Located in Salt Lake City, UT / 429 miles away from Roundup, MT
2021 Sierra 1500 SLTCertified.GMC Certified Pre-Owned Details: * Roadside Assistance * Vehicle History * Powertrain Limited Warranty: 72 Mo...
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: 3GTU9DELXMG193101
Stock: G43206B
Certified Pre-Owned: Yes
Listed since: 04-30-2025 - Price Drop$34,489great price$5,914 below market
- 102,617 miles
- 1 accident, 1 owner, personal use only
- 5'10” bed, 3l, 6cyl
- Corwin Motors Kalispell (299 mi away)
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Located in Kalispell, MT / 299 miles away from Roundup, MT
Our One Owner, Diesel powered 2021 GMC Sierra 1500 SLT Crew Cab Short Box 4X4 with the X31 Off-Road Pack delivers what you demand in a truck with a bo...
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: 1GTU9DET0MZ322138
Stock: 4322138
Certified Pre-Owned: No
Listed since: 07-08-2025 - Price Drop$38,995great price$8,155 below market
- 69,469 miles
- No accidents, 1 owner, personal use only
- 5'10” bed, 6.2l, 8cyl
- Driveway (277 mi away)
- Home delivery*
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Located in Casper, WY / 277 miles away from Roundup, MT
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 - New Listing$41,502great price$5,751 below market
- 57,115 miles
- No accidents, 2 owners, personal use only
- 5'10” bed, 3l, 6cyl
- Corwin Ford Spokane (421 mi away)
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Located in Spokane Valley, WA / 421 miles away from Roundup, MT
Recent Arrival! Priced below KBB Fair Purchase Price! Our No Accidents Reported, Diesel powered 2021 GMC Sierra 1500 Denali Crew Cab Standard Box 4X4 ...
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: 3GTU9FET3MG173848
Stock: 8173848
Certified Pre-Owned: No
Listed since: 07-28-2025 - $35,797great price$4,809 below market
- 112,577 miles
- No accidents, 1 owner, personal use only
- 5'10” bed, 3l, 6cyl
- AutoNation Buick GMC West (492 mi away)
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Located in Golden, CO / 492 miles away from Roundup, MT
Denali Ultimate PackageLpo; Front Brake Kit-PerformanceTechnology PackageWhite Frost TricoatDriver Alert Package IiEngine; Duramax 3.0L Turbo-Die...
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: 3GTU9FET2MG232209
Stock: MG232209
Certified Pre-Owned: No
Listed since: 08-23-2025 - Price Drop$42,497good price$3,123 below market
- 25,618 miles
- No accidents, 4 owners, personal use only
- 5'10” bed, 5.3l, 8cyl
- EchoPark Automotive Denver (Thornton) (485 mi away)
- Five Star Dealer
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Located in Thornton, CO / 485 miles away from Roundup, MT
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$48,750fair price$367 above market
- 21,776 miles
- No accidents, 1 owner, personal use only
- 5'10” bed, 6.2l, 8cyl
- Young Chrysler Dodge Jeep Ram (402 mi away)
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Located in Morgan, UT / 402 miles away from Roundup, MT
Odometer is 40556 miles below market average! White Frost Tricoat 4D Crew Cab 4WD Denali 10-Speed Automatic EcoTec3 6.2L V8
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: 3GTU9FEL1MG305411
Stock: 12U2Y1627
Certified Pre-Owned: No
Listed since: 07-15-2025 - Price Drop$39,158good price$3,318 below market
- 77,645 miles
- 1 accident, 2 owners, personal use only
- 5'10” bed, 3l, 6cyl
- Corwin Motors Kalispell (299 mi away)
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Located in Kalispell, MT / 299 miles away from Roundup, MT
Our Diesel powered 2021 GMC Sierra 1500 SLT Crew Cab Short Box 4X4 with the X31 Off-Road Pack delivers what you demand in a truck with a bold Dark Sky...
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: 3GTU9DETXMG184317
Stock: 4184317
Certified Pre-Owned: No
Listed since: 07-24-2025 - Price Drop$48,492fair price$1,856 below market
- 38,100 miles
- No accidents, 1 owner, personal use only
- 5'10” bed, 6.2l, 8cyl
- AutoNation Toyota Spokane Valley (420 mi away)
- Five Star Dealer
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Located in Spokane Valley, WA / 420 miles away from Roundup, MT
Denali Ultimate PackageEngine; 6.2L Ecotec3 V8Technology PackageDriver Alert Package IiSunroof; PowerSun/MoonroofLeather SeatsOnyx BlackNaviga...
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: 3GTU9FEL4MG135030
Stock: MG135030
Certified Pre-Owned: No
Listed since: 08-07-2025 - $44,499fair price$264 above market
- 38,504 miles
- No accidents, 3 owners, personal use only
- 6'7” bed, 3l, 6cyl
- AutoNation USA Denver 104 (485 mi away)
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Located in Northglenn, CO / 485 miles away from Roundup, MT
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 - New Listing$36,597good price$2,434 below market
- 58,792 miles
- 1 accident, 2 owners, personal use
- 5'10” bed, 3l, 6cyl
- EchoPark Automotive Denver (Thornton) (485 mi away)
- Five Star Dealer
Close
Located in Thornton, CO / 485 miles away from Roundup, MT
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: 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: 3GTU9CET6MG158601
Stock: YMG158601
Certified Pre-Owned: No
Listed since: 08-20-2025 - Price Drop$36,998good price$2,733 below market
- 100,034 miles
- 2 accidents, 2 owners, personal use only
- 5'10” bed, 3l, 6cyl
- CarMax Loveland (450 mi away)
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Located in Loveland, CO / 450 miles away from Roundup, MT
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$39,565good price$2,731 below market
- 92,245 miles
- 1 accident, 1 owner, personal use
- 6'7” bed, 3l, 6cyl
- Larry H. Miller Chrysler Jeep Dodge Ram Boise (424 mi away)
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Located in Boise, ID / 424 miles away from Roundup, MT
2021 GMC Sierra 1500 AT4 AT4 Preferred Package,AT4 Value Package,Driver Alert Package I,Driver Alert Package II,Preferred Equipment Group 4SB,Technolo...
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:
24 Combined MPG (22 City/26 Highway)
Listing Information:
VIN: 1GTU9EETXMZ363592
Stock: BCD250520A
Certified Pre-Owned: No
Listed since: 08-26-2025 - New Listing$43,998fair price$652 below market
- 40,223 miles
- No accidents, 2 owners, personal use only
- 5'10” bed, 5.3l, 8cyl
- CarMax West 104th Ave (485 mi away)
Close
Located in Federal Heights, CO / 485 miles away from Roundup, MT
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:
18 Combined MPG (16 City/21 Highway)
Listing Information:
VIN: 3GTP9EEDXMG184328
Stock: 26514883
Certified Pre-Owned: No - $44,971fair price$102 below market
- 46,835 miles
- No accidents, 1 owner, personal use only
- 5'10” bed, 5.3l, 8cyl
- ClearShift Loveland (450 mi away)
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Located in Loveland, CO / 450 miles away from Roundup, MT
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 - $32,994fair price$99 below market
- 117,088 miles
- No accidents, 1 owner, personal use only
- 5'10” bed, 5.3l, 8cyl
- Peterson Chevrolet Buick (426 mi away)
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Located in Boise, ID / 426 miles away from Roundup, MT
Recent Arrival! Our No Accidents Reported 2021 GMC Sierra 1500 Elevation Crew Cab 4X4 with the Preferred Package has a bold presence that really raise...
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: 3GTU9CED7MG482715
Stock: 325299
Certified Pre-Owned: No
Listed since: 07-31-2025 - $46,668fair price$296 above market
- 24,824 miles
- No accidents, personal use only
- 6'7” bed, 6.2l, 8cyl
- Veracity Motors (370 mi away)
Close
Located in Bismarck, ND / 370 miles away from Roundup, MT
2021 GMC Sierra 1500 AT4 EcoTec3 6.2L V8---LEATHER HEATED/COOLED FRONT SEATS WITH 2 TONE BLACK/FOOTBALL LEATHER INTERIOR, HEATED REAR SEATS, BOSE PREM...
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: 1GTP9EEL9MZ173456
Stock: B5916
Certified Pre-Owned: No
Listed since: 07-24-2025 - Price Drop$26,995fair price$1,424 below market
- 105,888 miles
- 1 accident, 2 owners, rental vehicle
- 5'10” bed, 5.3l, 8cyl
- Kendall Value Lot (437 mi away)
Close
Located in Nampa, ID / 437 miles away from Roundup, MT
Automatic, 4WD, Gray Cloth, 10-Way Power Driver Seat Adjuster w/Lumbar, 12-Volt Rear Auxiliary Power Outlet, 220 Amp Alternator, 3.42 Rear Axle Ratio,...
AutoCheck Vehicle History Summary
Accident Free Vehicle: No
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:
17 Combined MPG (15 City/20 Highway)
Listing Information:
VIN: 1GTU9BED2MZ273876
Stock: D952887A
Certified Pre-Owned: No
Listed since: 08-29-2025 - $42,933fair price$1,203 below market
- 72,764 miles
- No accidents, 1 owner, personal use
- 6'7” bed, 3l, 6cyl
- Kendall at the Idaho Center Auto Mall (435 mi away)
Close
Located in Nampa, ID / 435 miles away from Roundup, MT
Recent Arrival! 10-Speed Automatic, 4WD, Jet Black Leather, 10-Way Power Driver Seat Adjuster w/Lumbar, 10-Way Power Passenger Seat Adjuster w/Lumbar,...
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: 1GTU9FET1MZ357928
Stock: D152962A
Certified Pre-Owned: No
Listed since: 08-22-2025 - $39,934fair price$865 above market
- 71,745 miles
- No accidents, 1 owner, personal use only
- 6'7” bed, 3l, 6cyl
- Veracity Motors (370 mi away)
Close
Located in Bismarck, ND / 370 miles away from Roundup, MT
2021 GMC Sierra 1500 AT4 3.0L I6---VERY SHARP LOOKING WHITE ON BLACK AT4 PICKUP WITH THE DIESEL HALF TON ENGINE, LEATHER INTERIOR, HEATED/COOLED FRONT...
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: 1GTU9EET4MZ431269
Stock: B5881
Certified Pre-Owned: No
Listed since: 06-11-2025
Showing 1 - 21 out of 2,363 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 Roundup, MT Values
Estimated values
2021 GMC Sierra 1500 AT4 4dr Crew Cab 4WD 6.6 ft. SB (6.2L 8cyl 10A) with no options
| Condition | Trade-In | Private Party | Dealer Retail |
|---|---|---|---|
| Outstanding | $36,752 | $38,842 | $40,943 |
| Clean | $36,079 | $38,092 | $40,113 |
| Average | $34,958 | $36,843 | $38,729 |
| Rough | $33,500 | $35,220 | $36,930 |
The average list price of a used 2021 GMC Sierra 1500 in Roundup, Montana is $40,390. The average mileage on a used GMC Sierra 1500 2021 for sale in Roundup, Montana is 65,747. Based on the average mileage of 65,747 for used 2021 GMC Sierra 1500 for sale in Roundup, MT 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 Roundup, Montana to be $34,958.
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