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  • New Listing
    • 75,000 miles
    • No accidents, 2 owners, personal use only
    • 8'2” bed, 6.6l, 8cyl
    • GMC Bedford Hills (29 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Bedford Hills, NY / 29 miles away from Bridgeport, CT

    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: 1GT42YEY6JF109439
    Stock: T30040A
    Certified Pre-Owned: No
    Listed since: 07-26-2025

  • $54,987
    great price
    $3,420 below market
    • 52,742 miles
    • No accidents, 1 owner, personal use only
    • 6'7” bed, 6.6l, 8cyl
    • Scranton GMC (58 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Vernon, CT / 58 miles away from Bridgeport, CT

    The 2019 GMC Sierra 3500HD Denali is a heavy-duty pickup truck that combines exceptional capability, luxury, and advanced technology, making it ideal ...

    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: 1GT42WEY7KF194023
    Stock: 10665
    Certified Pre-Owned: No
    Listed since: 03-21-2025

  • New Listing
    • 25,230 miles
    • No accidents, 1 owner, personal use only
    • 8'2” bed, 6.6l, 8cyl
    • Saw Mill Auto (41 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Yonkers, NY / 41 miles away from Bridgeport, CT

    Vehicle Overview ATTENTION CUSTOMERS Please join our eMail List to receive SPECIAL PROMOTIONS and notifications of our SPECIAL EVENTS & INCOMING INVEN...

    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: Yes

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    Listing Information:

    VIN: 1GT42WEY4KF224417
    Stock: J3763
    Certified Pre-Owned: No
    Listed since: 07-29-2025

  • $44,900
    great price
    $5,425 below market
    • 91,361 miles
    • No accidents, 1 owner, corporate fleet vehicle
    • 6'7” bed, 6.6l, 8cyl
    • Tru Auto Mall (36 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Berlin, CT / 36 miles away from Bridgeport, CT

    ** ONE OWNER ** 2018 GMC Sierra 3500 HD Crew Cab Denali 4WD SRW 6.6L V8 T-Diesel **

    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: 1GT42YEY4JF261364
    Stock: b261364
    Certified Pre-Owned: No
    Listed since: 06-06-2025

  • Advertisement

    4 Offers Nearby

    2025 GMC Sierra 2500HD
    $46,300
    starting MSRP
    • 6 Colors
    • 2 Trims
    • 10 Packages
    View Offers 
    *The Manufacturer’s Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees, and optional equipment. Dealer sets final price. Click here to see all GMC vehicles’ destination freight charges.
  • New Listing
    • 65,566 miles
    • 1 accident, 1 owner, personal use only
    • 8'2” bed, 6.6l, 8cyl
    • CarMax (In-stock online)
    • Transfer available from NM to CT*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Albuquerque, NM / 1,850 miles away from Bridgeport, CT

    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: 1GT42WEY0KF181386
    Stock: 27451055
    Certified Pre-Owned: No

  • $53,900
    fair price
    $3,506 below market
    • 22,994 miles
    • No accidents, 1 owner, personal use
    • 6'10” bed, 6.6l, 8cyl
    • Hudson Cadillac Buick GMC (50 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Poughkeepsie, NY / 50 miles away from Bridgeport, CT

    WiFi Hotspot, Onboard Communications System, Aluminum Wheels, Hitch, GOOSENECK / 5TH WHEEL PREP PACKAGE, TRANSMISSION, 6-SPEED AUTOMATIC, HEAV... SLE ...

    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: 1GT49TE76NF283538
    Stock: 31633
    Certified Pre-Owned: No
    Listed since: 06-20-2025

  • Price Drop
    $53,990
    fair price
    $386 below market
    • 105,362 miles
    • No accidents, 3 owners, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Richmond, VA / 341 miles away from Bridgeport, CT

    At Carvana, we go miles beyond the extra mile. That's why we provide you with a convenient, fast, and hassle-free car buying experience that puts you ...

    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: 1GT49WEY7LF113552
    Stock: 2003726489
    Certified Pre-Owned: No
    Listed since: 05-10-2025

  • Price Drop
    $51,590
    fair price
    $888 above market
    • 80,630 miles
    • No accidents, 1 owner, personal use only
    • 8'2” bed, 6.6l, 8cyl
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Charlotte, NC / 585 miles away from Bridgeport, CT

    At Carvana, we go miles beyond the extra mile. That's why we provide you with a convenient, fast, and hassle-free car buying experience that puts you ...

    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: 1GT42YEYXJF245542
    Stock: 2003864142
    Certified Pre-Owned: No
    Listed since: 07-04-2025

  • Advertisement

    4 Offers Nearby

    2025 GMC Sierra 2500HD
    $46,300
    starting MSRP
    • 6 Colors
    • 2 Trims
    • 10 Packages
    View Offers 
    *The Manufacturer’s Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees, and optional equipment. Dealer sets final price. Click here to see all GMC vehicles’ destination freight charges.
  • New Listing
    • 71,412 miles
    • No accidents, 2 owners, rental vehicle
    • 8'2” bed, 6.6l, 8cyl
    • Scranton Cadillac (58 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Upgraded Headlights
    • Tire Pressure Warnin...
    Close

    Located in Vernon, CT / 58 miles away from Bridgeport, CT

    RECENT TRADE!! THIS SIERRA 3500 CREW CAB DIESEL 4X4 ALL POWER OPTIONS, BRAKE CONTROLLER, BLOCK HEATER, APPLE CARPLAY/ANDROID AUTO, BACK UP CAMERA, AND...

    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: 1GT49SEY4LF292688
    Stock: 13501
    Certified Pre-Owned: No
    Listed since: 07-01-2025

  • New Listing
    • 58,747 miles
    • No accidents, 1 owner, personal use only
    • 8'2” bed, 6.6l, 8cyl
    • Enterprise Car Sales East Hartford (48 mi away)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Upgraded Headlights
    • Tire Pressure Warnin...
    Close

    Located in East Hartford, CT / 48 miles away from Bridgeport, CT

    Transfer of vehicle from another location to your neighborhood Enterprise Car Sales may require payment of a non-refundable transfer fee to begin the ...

    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: 1GT39SE79NF261426
    Stock: 8G2BYG
    Certified Pre-Owned: No
    Listed since: 06-30-2025

    • 75,113 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Hudson Cadillac Buick GMC (50 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Poughkeepsie, NY / 50 miles away from Bridgeport, CT

    Satellite Radio, Running Boards, Back-Up Camera, Cooled Driver Seat, 4x4, SLE CONVENIENCE PACKAGE, Hitch, TRANSMISSION, 6-SPEED AUTOMATIC, HEAV... ENG...

    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: 1GT49TE73NF190900
    Stock: 31655
    Certified Pre-Owned: Yes
    Listed since: 07-07-2025

    • 84,847 miles
    • Frame damage reported, 2 owners, personal use only
    • 8'2” bed, 6.6l, 8cyl
    • Terryville Chevrolet (35 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Upgraded Headlights
    • Tire Pressure Warnin...
    Close

    Located in Terryville, CT / 35 miles away from Bridgeport, CT

    At Terryville Chevrolet, we treat you right. 2020 GMC Sierra 3500HD Duramax 6.6L V8 Turbodiesel 4WD Summit WhiteTerryville Chevrolet we treat you r...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Issue reported

    Salvage Vehicle: No

    Frame Damage: Yes

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    Listing Information:

    VIN: 1GT59SEY5LF218278
    Stock: 9531
    Certified Pre-Owned: No
    Listed since: 07-02-2025

  • Advertisement

    4 Offers Nearby

    2025 GMC Sierra 2500HD
    $46,300
    starting MSRP
    • 6 Colors
    • 2 Trims
    • 10 Packages
    View Offers 
    *The Manufacturer’s Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees, and optional equipment. Dealer sets final price. Click here to see all GMC vehicles’ destination freight charges.
  • Photos not available
    • 86,929 miles
    • Salvage reported, 1 owner, personal use only
    • 8'2” bed, 6l, 8cyl
    • Premier Motorcars (46 mi away)
    • AWD/4WD
    • Bluetooth
    • Tire Pressure Warnin...
    • USB Inputs
    • Trip Computer
    Close

    Located in Canton, CT / 46 miles away from Bridgeport, CT

    ALL VEHICLES SOLD BY PREMIER MOTORSPORTS ARE SALVAGE PRICE DOESNT NOT INCLUDE SALES TAX OR REGIISTRATION SALVAGE VEHICLES SOLD WITH PASSING CT SALVAG...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Issue reported

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    Listing Information:

    VIN: 1GD32VCG4GZ323823
    Stock: 3823
    Certified Pre-Owned: No

    • 47,489 miles
    • No accidents, 1 owner, rental vehicle
    • DSA Motor Sports Corp (25 mi away)
    Close

    Located in Commack, NY / 25 miles away from Bridgeport, CT

    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: 1GT42VCG1GF110600
    Stock: 110600
    Certified Pre-Owned: No

    • 74,269 miles
    • No accidents, 1 owner, personal use only
    • 8'2” bed, 6.6l, 8cyl
    • Capital Motor Group (28 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Upgraded Headlights
    • Tire Pressure Warnin...
    Close

    Located in Medford, NY / 28 miles away from Bridgeport, CT

    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: 1GT49SE74NF288487
    Stock: 10191
    Certified Pre-Owned: No

  • New Listing
    $54,974
    good price
    $2,572 below market
    • 21,710 miles
    • No accidents, 1 owner, personal use only
    • 8'2” bed, 6.6l, 8cyl
    • Brustolon Buick GMC (63 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Mystic, CT / 63 miles away from Bridgeport, CT

    Priced below KBB Fair Purchase Price! Odometer is 21591 miles below market average! CARFAX One-Owner. Clean CARFAX.Pacific Blue Metallic 2023 GMC Sier...

    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: 1GT49UE70PF121154
    Stock: 6872P
    Certified Pre-Owned: No
    Listed since: 07-30-2025

  • Advertisement

    4 Offers Nearby

    2025 GMC Sierra 2500HD
    $46,300
    starting MSRP
    • 6 Colors
    • 2 Trims
    • 10 Packages
    View Offers 
    *The Manufacturer’s Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees, and optional equipment. Dealer sets final price. Click here to see all GMC vehicles’ destination freight charges.
    • 18,700 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Romeo Chevrolet Buick GMC (70 mi away)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Lake Katrine, NY / 70 miles away from Bridgeport, CT

    Romeo GM Center Proudly presents this 2023 GMC Sierra 3500HD with Driver Alert Package I (Lane Change Alert w/Side Blind Zone Alert, Perimeter Lightin...

    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: 1GT49VE78PF187490
    Stock: TR25217
    Certified Pre-Owned: No
    Listed since: 06-12-2025

  • $31,441
    fair price
    $649 below market
    • 195,362 miles
    • 2 accidents, 3 owners, personal use only
    • 6'7” bed, 6.6l, 8cyl
    • Euro Motor Haus (40 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Great Neck, NY / 40 miles away from Bridgeport, CT

    ? Call or Text (5**) 6**-1*** prior to your visit for special internet pricing and quick answers to your questions ? Visit Euro Motor Haus online at M...

    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: 1GT42YEYXHF162879
    Stock: UC416
    Certified Pre-Owned: No
    Listed since: 03-09-2025

  • $54,827
    fair price
    $552 below market
    • 44,338 miles
    • 1 accident, 1 owner, personal use only
    • 8'2” bed, 6.6l, 8cyl
    • McGee GMC of Charlton (88 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Charlton, MA / 88 miles away from Bridgeport, CT

    Odometer is 54985 miles below market average! 2017 GMC Sierra 3500HD Stone Blue Metallic Denali Allison 1000 6-Speed Automatic, 4WD, Jet Black Leather...

    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: 1GT42YEY2HF153786
    Stock: A1239A
    Certified Pre-Owned: No
    Listed since: 04-30-2025

  • Price Drop
    • 120,107 miles
    • No accidents, 2 owners, personal use
    • 8'2” bed, 6l, 8cyl
    • A Better Way Wholesale Autos (24 mi away)
    • AWD/4WD
    • Tire Pressure Warnin...
    • USB Inputs
    • Trip Computer
    • Stability Control
    Close

    Located in Naugatuck, CT / 24 miles away from Bridgeport, CT

    - Robust and reliable 2015 GMC Sierra 3500HD with 120,107 miles, perfect for heavy-duty tasks. - Equipped with a powerful engine and 6-Speed Shiftabl...

    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: 1GD321CG7FF187339
    Stock: 187339N
    Certified Pre-Owned: No

    • 105,237 miles
    • No accidents, 2 owners, personal use only
    • 8'2” bed, 6l, 8cyl
    • Moore Brothers (39 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Upgraded Headlights
    • Tire Pressure Warnin...
    Close

    Located in Portland, CT / 39 miles away from Bridgeport, CT

    2017 GMC Sierra 3500HD 6.0L V8 2 door regular cab cloth seats touch screen stereo back up camera cell connectivity option steering wheel mounted contr...

    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: 1GT32VCG1HZ251548
    Stock: 251548
    Certified Pre-Owned: No
    Listed since: 05-20-2025

Showing 1 - 21 out of 91 listings

Consumer Reviews for the GMC Sierra 3500HD

Read recent reviews for the GMC Sierra 3500HD
Overall Consumer Rating
3.5 out of 5 stars13 Reviews
Write a vehicle reviewSee all 13 reviews
  • 5 star
    (46%)
  • 4 star
    (15%)
  • 3 star
    (0%)
  • 2 star
    (15%)
  • 1 star
    (23%)
4 out of 5 stars

The designers and engineers should drive it more

Mike Langford, 01/16/2020
2017 GMC Sierra 3500HD Denali 4dr Crew Cab 4WD LB DRW (6.0L 8cyl 6A)
The Nav system is almost useless as far as address input, The 4 wheel selector knob doesn't need to above the very similar headlight knob, Why not put a DEF gauge in it? When DEF warning triggers the DIC, no other information is available until the DEF tank is filled! Entertainment system (CD, books on disk and downloaded library books) startup again when I approach the vehicle … (phone in my pocket) and the engine is running. I have lost my place in many books many times because of this. The backup camera surely came from a Cracker Jacks box, substandard quality. The center display will ruin your night vision when put in reverse (it could use a dimmer/off switch). And why not allow full time use of the back up camera and back up lighting? (I live and work on my farm). Steering wheel buttons could be a little more intuitive, It's easy to turn on the steering wheel heater when the intent was to reduce the cruise speed. My truck has the 6.6 Duramax (awsome!) and I drive about 10k miles/mo. Needless to say, I'm in it a lot. Don't misunderstand, I love my truck but like I said in the beginning, the design and engineering people should have to drive their creations for a month or so. How did someone devise the notion to put the DEF filler neck under the hood and on the passenger side firewall? A common problem and more future problems will occur as the caustic DEF fluid splashes out of the filler neck, it drains down on top of and puddles in the wiring harness on the bottom of the DEF tank where the wires go into the bottom of the tank. It's happened once and it damaged the DEF tank heater... thingie. Luckily it was under extended warranty. And one thing Edmunds, I couldn't find the 6.6 Duramax option on your drop down menus. There all 6.0s
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Used 2018 GMC Sierra 3500HD in Bridgeport, CT Values

Estimated values
2018 GMC Sierra 3500HD Denali 4dr Crew Cab 4WD LB (6.6L 8cyl Turbodiesel 6A) with no options
ConditionTrade-InPrivate PartyDealer Retail
Outstanding$39,434$43,017$45,962
Clean$38,346$41,816$44,664
Average$36,532$39,815$42,502
Rough$34,175$37,214$39,690

The average list price of a used 2018 GMC Sierra 3500HD in Bridgeport, Connecticut is $45,111. The average mileage on a used GMC Sierra 3500HD 2018 for sale in Bridgeport, Connecticut is 72,531. Based on the average mileage of 72,531 for used 2018 GMC Sierra 3500HD for sale in Bridgeport, CT 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 2018 in Bridgeport, Connecticut to be $36,532.

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