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  • Price Drop
    $48,700
    fair price
    $298 below market
    • 13,533 miles
    • No accidents, 1 owner, personal use only
    • 8'2” bed, 6.6l, 8cyl
    • Colonial Chevrolet (112 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Upgraded Headlights
    • Tire Pressure Warnin...
    Close

    Located in Acton, MA / 112 miles away from New Haven, CT

    Highlights of this 2024 GMC Sierra 2500HD include: Serviced here, Very Nice, CARFAX 1-Owner, ONLY 13,533 Miles! JUST REPRICED FROM $49,999, $4,700 bel...

    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: 1GT39LE79RF161371
    Stock: A25611A
    Certified Pre-Owned: No
    Listed since: 04-24-2025

  • Price Drop
    $51,800
    fair price
    $842 below market
    • 30,132 miles
    • No accidents, 2 owners, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Toyota of Nashua (124 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Keyless Entry/Start
    Close

    Located in Nashua, NH / 124 miles away from New Haven, 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: 1GT59ME73RF164300
    Stock: N23918C
    Certified Pre-Owned: No
    Listed since: 04-27-2025

  • $71,994
    fair price
    $136 below market
    • 22,284 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Star GMC (130 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Easton, PA / 130 miles away from New Haven, CT

    **LOCAL TRADE IN, **NAVIGATION, **SUNROOF, **LEATHER, **CLEAN CARFAX 1 OWNER**, **BLUETOOTH, **BACKUP CAMERA, **USB PORT, **SATELLITE RADIO, **MEMORY ...

    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: 1GT49RE79RF328335
    Stock: 451174M
    Certified Pre-Owned: Yes
    Listed since: 04-24-2025

  • $71,797
    good price
    $3,695 below market
    • 40,154 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Star GMC Quakertown (140 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Quakertown, PA / 140 miles away from New Haven, CT

    GM CERTIFIED, Adaptive Cruise Control, Denali Reserve Package, Inside Rearview Auto-Dimming Rear Camera Mirror, Multicolor 15 Diagonal Head-Up Display...

    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: 1GT49REY4RF104687
    Stock: 2314
    Certified Pre-Owned: Yes
    Listed since: 02-11-2025

  • Advertisement

    Special offers available

    2025 GMC Sierra HD Denali
    $46,300
    starting MSRP
    • 2 Trims
    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.
  • $71,990
    fair price
    $555 below market
    • 10,835 miles
    • No accidents, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Hyundai of Trenton (121 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Ewing, NJ / 121 miles away from New Haven, CT

    Sterling Metallic 2024 GMC Sierra 2500HD Denali 4WD 10-Speed Automatic Duramax 6.6L V8 Turbodiesel Keyless start, Google Built-in services, Forward co...

    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: 1GT49REY1RF403540
    Stock: 403540C01
    Certified Pre-Owned: No
    Listed since: 04-16-2025

  • $88,895
    fair price
    $2,267 below market
    • 2,801 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • McGovern GMC (95 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Westborough, MA / 95 miles away from New Haven, CT

    McGovern GMC is proud to present this...Onyx Black 2024 GMC Sierra 2500HD AT4X Duramax 6.6L V8 Turbodiesel 10-Speed Automatic Clean CARFAX.Features ...

    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: 1GT49ZEY9RF343068
    Stock: GM3501
    Certified Pre-Owned: Yes
    Listed since: 05-08-2025

  • Price Drop
    $68,987
    good price
    $3,298 below market
    • 42,062 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Banks Chevrolet Buick GMC (148 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Concord, NH / 148 miles away from New Haven, CT

    10-Way Power Driver Seat Adjuster w/Lumbar,10-Way Power Passenger Seat Adjuster w/Lumbar,2 Charge/Data USB Ports,2 Charge/Data USB Ports Inside Center...

    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: 1GT49NEY3RF134921
    Stock: T34921
    Certified Pre-Owned: Yes
    Listed since: 04-08-2025

  • $74,797
    good price
    $2,635 below market
    • 10,361 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Ingersoll Auto of Danbury (26 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Danbury, CT / 26 miles away from New Haven, CT

    CARFAX One-Owner. Clean CARFAX. Sierra 2500HD Denali, Duramax 6.6L V8 Turbodiesel, 4WD, 12-Way Power Driver Seat Adjuster w/Lumbar, Apple CarPlay/Andr...

    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: 1GT49REY2RF130432
    Stock: A130432
    Certified Pre-Owned: No
    Listed since: 06-04-2025

  • Advertisement

    Special offers available

    2025 GMC Sierra HD Denali
    $46,300
    starting MSRP
    • 2 Trims
    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.
  • $74,995
    fair price
    $1,235 below market
    • 7,712 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Automotive Avenues (99 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Wall, NJ / 99 miles away from New Haven, CT

    Just arrived is this magnificently monstrous, NO-ACCIDENT, ONE-OWNER, NONSMOKER 2024 GMC Sierra 2500HD Crew Cab SLT 4x4! ''Today's crop of full-size t...

    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: 1GT49PEY6RF434352
    Stock: 53746A
    Certified Pre-Owned: No
    Listed since: 05-06-2025

  • Stock photo**
    $71,999
    good price
    $3,481 below market
    • 25,979 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Colonial Ford (124 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Plymouth, MA / 124 miles away from New Haven, CT

    Highlights of this 2024 GMC Sierra 2500HD include: Heated Leather Seats, Nav System, Heated Rear Seat, Aluminum Wheels, Bed Liner, 4x4, ENGINE, DURAMA...

    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: 1GT19PEY3RF404924
    Stock: R10009
    Certified Pre-Owned: No
    Listed since: 05-30-2025

  • Price Drop
    $72,500
    good price
    $3,272 below market
    • 40,714 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • McGovern Chrysler Jeep Dodge RAM of Acton (112 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Acton, MA / 112 miles away from New Haven, CT

    McGovern Chrysler Jeep Dodge Ram of Acton proudly presents this McGovern Certified... 2024 GMC Sierra 2500HD Denali White Frost Tricoat Duramax 6.6L V...

    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: 1GT49REY8RF305587
    Stock: RN2171A
    Certified Pre-Owned: No
    Listed since: 05-18-2025

  • Price Drop
    • 32,289 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Banks Chevrolet Buick GMC (148 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Concord, NH / 148 miles away from New Haven, CT

    16-Way Power Driver Seat Adjuster w/Lumbar,16-Way Power Passenger Seat Adjuster w/Lumbar,2 Charge/Data USB Ports Inside Center Console,2 Charge-Only R...

    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: 1GT49XEY5RF141297
    Stock: T41297B
    Certified Pre-Owned: Yes
    Listed since: 03-14-2025

  • Advertisement

    Special offers available

    2025 GMC Sierra HD Denali
    $46,300
    starting MSRP
    • 2 Trims
    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.
  • $55,000
    good price
    $2,805 below market
    • 36,539 miles
    • No accidents, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Ingersoll Auto of Danbury (26 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Danbury, CT / 26 miles away from New Haven, CT

    Clean CARFAX. Sierra 2500HD SLT, 6.6L V8, 4WD, 6' Rectangular Chromed Tubular Assist Steps, Automatic Emergency Braking, Driver Alert Package I, Drive...

    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: 1GT49NE71NF330129
    Stock: A330129
    Certified Pre-Owned: No
    Listed since: 04-04-2025

  • Price Drop
    $89,487
    fair price
    $1,184 below market
    • 17,091 miles
    • No accidents, 2 owners, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Banks Chevrolet Buick GMC (148 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Concord, NH / 148 miles away from New Haven, CT

    16-Way Power Driver Seat Adjuster w/Lumbar,16-Way Power Passenger Seat Adjuster w/Lumbar,2 Charge-Only Rear USB Ports,2 Charge/Data USB Ports Inside C...

    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: 1GT49ZEYXRF247756
    Stock: T47756
    Certified Pre-Owned: Yes
    Listed since: 05-15-2025

  • $69,998
    fair price
    $1,095 below market
    • 13,056 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Herb Chambers Chevrolet of Danvers (132 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Danvers, MA / 132 miles away from New Haven, CT

    INSPECTION COMPLETED Every Herb Chambers Certified pre-owned vehicle receives a complete multi-point inspection by factory trained technicians who ins...

    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: 1GT49RE70RF358274
    Stock: CD4383XX
    Certified Pre-Owned: No
    Listed since: 05-17-2025

  • $39,187
    fair price
    $906 below market
    • 27,853 miles
    • No accidents, 1 owner, personal use only
    • 8'2” bed, 6.6l, 8cyl
    • Best Chevrolet (120 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Upgraded Headlights
    • Tire Pressure Warnin...
    Close

    Located in Hingham, MA / 120 miles away from New Haven, CT

    Best Chevrolet is proud to present you with another True Market Priced Pre-Owned Vehicle. This 2022 GMC Sierra 2500HD Pro GMC Certified Pre-Owned is l...

    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: 1GT39LE75NF322809
    Stock: 15307PB
    Certified Pre-Owned: No
    Listed since: 04-15-2025

  • Advertisement

    Special offers available

    2025 GMC Sierra HD Denali
    $46,300
    starting MSRP
    • 2 Trims
    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.
  • $74,162
    fair price
    $2,759 below market
    • 37,836 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Star GMC Quakertown (140 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Quakertown, PA / 140 miles away from New Haven, CT

    BALANCE OF FACTORY WARRANTY, CARFAX 1 OWNER, Adaptive Cruise Control, AT4 Preferred Package, Gooseneck/5th Wheel Prep Package, Hill Descent Control, I...

    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: 1GT49PEY3RF187159
    Stock: 2340
    Certified Pre-Owned: Yes
    Listed since: 03-21-2025

  • $71,768
    fair price
    $861 below market
    • 11,868 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Star GMC Quakertown (140 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Quakertown, PA / 140 miles away from New Haven, CT

    GM CERTIFIED, 2 Charge/Data USB Ports Inside Center Console, 20 Machined Aluminum Wheels, ABS brakes, All-Weather Floor Liners (LPO), Bose Premium 7-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:

    Listing Information:

    VIN: 1GT49NEY8RF220547
    Stock: 2318
    Certified Pre-Owned: Yes
    Listed since: 02-11-2025

  • $77,995
    fair price
    $307 below market
    • 9,869 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Seacoast Mazda (164 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Portsmouth, NH / 164 miles away from New Haven, CT

    Black 2024 GMC Sierra 2500HD AT4 4WD 10-Speed Automatic Duramax 6.6L V8 Turbodiesel 10-Speed Automatic, 4WD, Leather.Recent Arrival! Odometer is 115...

    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: 1GT49PEY9RF307269
    Stock: U2017
    Certified Pre-Owned: No
    Listed since: 05-02-2025

  • $79,000
    good price
    $2,420 below market
    • 3,144 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Weirs GMC (190 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Arundel, ME / 190 miles away from New Haven, CT

    ONE OWNER, Sierra 2500HD Denali, 4D Crew Cab, Duramax 6.6L V8 Turbodiesel, 10-Speed Automatic, 4WD, Summit White, Jet Black Leather, 120-Volt Bed Moun...

    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: 1GT49REY5RF298145
    Stock: G25100C
    Certified Pre-Owned: No
    Listed since: 06-04-2025

  • $54,350
    fair price
    $524 below market
    • 9,300 miles
    • No accidents, 1 owner, personal use
    • 6'10” bed, 6.6l, 8cyl
    • Colonial Chevrolet (112 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Upgraded Headlights
    • Blind Spot Monitorin...
    Close

    Located in Acton, MA / 112 miles away from New Haven, CT

    Highlights of this 2024 GMC Sierra 2500HD include: Serviced here, REDUCED FROM $54,995! $5,800 below J.D. Power Retail! CARFAX 1-Owner, Very Nice, ONL...

    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: 1GT49LE76RF382267
    Stock: U3329
    Certified Pre-Owned: No
    Listed since: 02-24-2025

Showing 43 - 63 out of 848 listings

Consumer Reviews for the GMC Sierra 2500HD

Read recent reviews for the GMC Sierra 2500HD
Overall Consumer Rating
4.3 out of 5 stars35 Reviews
Write a vehicle reviewSee all 35 reviews
  • 5 star
    (71%)
  • 4 star
    (11%)
  • 3 star
    (3%)
  • 2 star
    (6%)
  • 1 star
    (9%)
4 out of 5 stars

Love the looks, love the power, love the economy

Rick B., 03/18/2021
2020 GMC Sierra 2500HD AT4 4dr Crew Cab 4WD SB (6.6L 8cyl 6A)
I purchased a 2020 Sierra 2500HD AT4 (Duramax) in November of 2020. This thing is a BEAST and a joy to drive. I've put almost 131K miles on it thus far and have not had a single issue. IMHO, the interior is better than a Ford but trails behind the Dodge. However, just because it seems less capable with technology isn't necessarily true. I have physical switches for many things that … the Dodge incorporates in their big screen. I MUCH prefer the switches because I don't have to go through electronic pages to find what I'm looking for. The seats are a bit hard but are very supportive. I'm averaging a 21mpg with it at this point but the majority (80%) of my driving is highway speeds. In an attempt see just how good of gas mileage I could get, I drove a cruise controlled speed of 55 mph on a VERY flat 2 lane road for a little over 75 miles. My results, 29.3mpg, yep, you read that right. As I get up to interstate cruising speed it's much closer to 22mpg. I have hauled my 6,000 pound boat a couple of times with it and it still gets around 14mpg. Speaking of hauling the boat, this thing tows like a dream. The cameras, mirrors and tow-haul mode work great and if I couldn't see the boat in my mirrors, I would hardly know it's there. The voice command menu and responsiveness is great, no issues with it and it has always recognized what I'm asking for. The Bose speakers produce more than I can listen to, and the cab is quiet enough for conference calls when I'm travelling for work. The in-cab outlet is perfect for charging my laptop on the go and allows my wife to use the computer when we travel without killing the battery. I put a hardcover on the bed but with the multipro tailgate I rarely have to do anything with it, and I make a LOT of trips to the lumber yard for 8'+ lumber. All I have to do is drop the upper portion of the tailgate and the long lumber slides right in and is safe and secure. One thing I would criticize. It doesn't match up when compared to the other makers off-roading capabilities (manual/push button locking differentials), but I didn't really buy it for that. If you want something to do some relatively challenging off-road cruising, look elsewhere. I could go on, but suffice it to say that I LOVE this truck and would absolutely recommend it without hesitation.
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Used 2024 GMC Sierra 2500HD in New Haven, CT Values

Estimated values
2024 GMC Sierra 2500HD Pro 2dr Regular Cab 4WD LB (6.6L 8cyl 10A) with no options
ConditionTrade-InPrivate PartyDealer Retail
Outstanding$36,276$38,347$40,859
Clean$35,882$37,864$40,274
Average$35,225$37,059$39,300
Rough$34,372$36,013$38,033

The average list price of a used 2024 GMC Sierra 2500HD in New Haven, Connecticut is $69,495. The average mileage on a used GMC Sierra 2500HD 2024 for sale in New Haven, Connecticut is 21,210. Based on the average mileage of 21,210 for used 2024 GMC Sierra 2500HD for sale in New Haven, 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 2500HD 2024 in New Haven, Connecticut to be $35,225.

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