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  • New Listing
    • 346,137 miles
    • 1 accident, 2 owners, personal use only
    • 9 Seats
    • Young Used Center (Ogden, UT)
    • AWD/4WD
    • Third-row seating
    • Power Driver Seat
    • Tire Pressure Warnin...
    • Multi-Zone Climate C...
    Close

    Located in Ogden, UT / 1,817 miles away from Ashburn, VA

    Recent Arrival! 2006 GMC Yukon XL SLT 2500Black SLT 2500 4WD 4-Speed Automatic HD with Overdrive Vortec 6.0L V8 SFICASH & CARRY - SOLD AS IS!

    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: 3GKGK26U46G229921
    Stock: 4UY1402A
    Certified Pre-Owned: No
    Listed since: 03-26-2026

  • Price Drop
    $2,994
    good price
    $1,508 below market
    • 259,153 miles
    • 1 accident, 3 owners, personal use only
    • 8 Seats, 13 City / 17 Hwy MPG
    • Todd Wenzel Chevrolet (Hudsonville, MI)
    • AWD/4WD
    • Third-row seating
    • Power Driver Seat
    • Multi-Zone Climate C...
    • Auto Climate Control
    Close

    Located in Hudsonville, MI / 510 miles away from Ashburn, VA

    A standout in Pewter Metallic, our 2003 GMC Yukon XL SLT 4WD is a maximum-size SUV for maximum-size projects. Powered by a 5.3 Liter V8 that offers 28...

    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:

    14 Combined MPG (13 City/17 Highway)

    Listing Information:

    VIN: 3GKFK16Z83G172104
    Stock: SH260479C
    Certified Pre-Owned: No
    Listed since: 04-08-2026

  • $8,933
    good price
    $1,783 below market
    • 147,875 miles
    • No accidents, 2 owners, personal use only
    • 7 Seats, 13 City / 19 Hwy MPG
    • Auto Deal Makers (Chantilly, VA)
    • AWD/4WD
    • Back-up camera
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Chantilly, VA / 8 miles away from Ashburn, VA

    Summit White 2007 GMC Yukon XL Denali AWD 6-Speed Automatic HD Electronic with Overdrive Vortec 6.2L V8 SFI VVTCLEAN CARFAX!!!, NO ACCIDENTS!!!, 31 SE...

    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:

    15 Combined MPG (13 City/19 Highway)

    Listing Information:

    VIN: 1GKFK66847J261287
    Stock: 261287
    Certified Pre-Owned: No

    • 292,800 miles
    • No accidents, 3 owners, personal use only
    • 9 Seats, 13 City / 17 Hwy MPG
    • Parkway Auto Center (Deer Park, WA)
    • AWD/4WD
    • Third-row seating
    • Power Driver Seat
    • Tire Pressure Warnin...
    • Multi-Zone Climate C...
    Close

    Located in Deer Park, WA / 2,071 miles away from Ashburn, VA

    Hop into this sleek Silver 2005 GMC Yukon XL and get ready for an adventure! With its 4WD/AWD capabilities, you'll be driving with confidence on any 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: Yes

    Features and Specs:

    14 Combined MPG (13 City/17 Highway)

    Listing Information:

    VIN: 1GKFK16Z15J191790
    Stock: 30798
    Certified Pre-Owned: No

    • 277,000 miles
    • No accidents, 3 owners, personal use only
    • 9 Seats, 13 City / 17 Hwy MPG
    • Auto Image Auto Sales (Pocatello, ID)
    • AWD/4WD
    • Third-row seating
    • Power Driver Seat
    • Tire Pressure Warnin...
    • Multi-Zone Climate C...
    Close

    Located in Pocatello, ID / 1,831 miles away from Ashburn, VA

    Auto Image Auto Sales, LLC Sales 2042 Garrett Way Pocatello, ID 83201 208-233-5526 Visit Auto Image Auto Sales, LLC to shop our great deals. You can 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:

    14 Combined MPG (13 City/17 Highway)

    Listing Information:

    VIN: 3GKFK16ZX5G172057
    Stock: 12293
    Certified Pre-Owned: No
    Listed since: 10-14-2025

    • 210,591 miles
    • No accidents, 2 owners, personal use only
    • 8 Seats, 12 City / 16 Hwy MPG
    • Gold Key Motors (Centralia, WA)
    • AWD/4WD
    • Leather Seats
    • Third-row seating
    • Power Driver Seat
    • Tire Pressure Warnin...
    Close

    Located in Centralia, WA / 2,329 miles away from Ashburn, VA

    CLEAN TITLE... Only 2000 Down. Easy financing options, No Credit check, all you need is a drivers license and a down payment and proof if full coverag...

    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:

    13 Combined MPG (12 City/16 Highway)

    Listing Information:

    VIN: 1GKFK66U45J134694
    Stock: 134694
    Certified Pre-Owned: No
    Listed since: 04-25-2025

  • Price Drop
    $6,429
    great price
    $1,884 below market
    • 216,326 miles
    • No accidents, 2 owners, personal use only
    • 7 Seats, 12 City / 18 Hwy MPG
    • Corwin Ford Nampa (Nampa, ID)
    • AWD/4WD
    • Back-up camera
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Nampa, ID / 2,030 miles away from Ashburn, VA

    Our Accident Free 2010 GMC Yukon Denali AWD is shown in stunning Summit White will not disappoint you! Powered by a 6.2 Liter V8 that offers 403hp whi...

    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:

    14 Combined MPG (12 City/18 Highway)

    Listing Information:

    VIN: 1GKFK66878J194945
    Stock: 4194945
    Certified Pre-Owned: No
    Listed since: 03-21-2026

  • $3,998
    great price
    $2,296 below market
    • 273,756 miles
    • 2 accidents, 3 owners, personal use
    • 8 Seats, 14 City / 19 Hwy MPG
    • Estherville Chevrolet GMC (Estherville, IA)
    • AWD/4WD
    • Third-row seating
    • Power Driver Seat
    • Tire Pressure Warnin...
    • Multi-Zone Climate C...
    Close

    Located in Estherville, IA / 949 miles away from Ashburn, VA

    *Why BUY from Estherville Chevrolet GMC?*When you choose this *Silver Birch Metallic 2008 GMC Yukon XL SLT w/4SB* with *273,756* miles, you are not ju...

    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:

    16 Combined MPG (14 City/19 Highway)

    Listing Information:

    VIN: 1GKFK16308R146194
    Stock: EP1097A
    Certified Pre-Owned: No
    Listed since: 03-10-2026

  • $7,599
    good price
    $3,482 below market
    • 160,329 miles
    • 1 accident, 4 owners, personal use only
    • 7 Seats, 12 City / 16 Hwy MPG
    • Certified Premium Motors (Lakewood, NJ)
    • AWD/4WD
    • Leather Seats
    • Sunroof/Moonroof
    • Third-row seating
    • Power Driver Seat
    Close

    Located in Lakewood, NJ / 191 miles away from Ashburn, VA

    DOWN PAYMENT AS LOW AS $499 . Welcome to Certified Premium Motors Where everyone is approved regardless of their credit history. So, Bad credit is app...

    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:

    13 Combined MPG (12 City/16 Highway)

    Listing Information:

    VIN: 1GKFK66U54J266586
    Stock: X266586
    Certified Pre-Owned: No

  • Price Drop
    $5,219
    fair price
    $1,564 below market
    • 241,880 miles
    • 2 accidents, 5 owners, personal use only
    • 8 Seats, 14 City / 19 Hwy MPG
    • West Hills Chrysler Dodge Jeep Ram (Bremerton, WA)
    • AWD/4WD
    • Third-row seating
    • Power Driver Seat
    • Tire Pressure Warnin...
    • Multi-Zone Climate C...
    Close

    Located in Bremerton, WA / 2,312 miles away from Ashburn, VA

    **Local Trade In**. West Hills Chrysler Jeep is very proud to offer this handsome 2008 GMC Yukon XL SLT 1500. Gold Mist Metallic 4WDAt West Hills CJ...

    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:

    16 Combined MPG (14 City/19 Highway)

    Listing Information:

    VIN: 1GKFK16318R123734
    Stock: XJ11069A
    Certified Pre-Owned: No
    Listed since: 03-05-2026

  • New Listing
    $3,616
    fair price
    $909 below market
    • 208,521 miles
    • 1 accident, 4 owners, corporate fleet vehicle
    • 8 Seats, 13 City / 17 Hwy MPG
    • Middlekauff Ford Lincoln (Twin Falls, ID)
    • AWD/4WD
    • Leather Seats
    • Third-row seating
    • Power Driver Seat
    • Tire Pressure Warnin...
    Close

    Located in Twin Falls, ID / 1,934 miles away from Ashburn, VA

    Deep Blue Metallic 2006 GMC Yukon XL SLT 1500 4WD 4-Speed Automatic with Overdrive Vortec 5.3L V8 SFI Flex Fuel2006 GMC Yukon XL SLT 1500See us today ...

    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: Yes

    Features and Specs:

    14 Combined MPG (13 City/17 Highway)

    Listing Information:

    VIN: 3GKFK16Z26G107057
    Stock: TS1652
    Certified Pre-Owned: No
    Listed since: 01-23-2026

  • $6,900
    good price
    $770 below market
    • 197,173 miles
    • No accidents, 8 owners, personal use only
    • 9 Seats, 13 City / 17 Hwy MPG
    • Space and Rocket Auto Sales (Meridianville, AL)
    • Leather Seats
    • Sunroof/Moonroof
    • Third-row seating
    • Power Driver Seat
    • Tire Pressure Warnin...
    Close

    Located in Meridianville, AL / 578 miles away from Ashburn, VA

    Visit Space Rocket Auto Sales to shop our great deals. You can contact us or call 256-828-0979 to schedule your test drive today.Please note: The paym...

    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:

    14 Combined MPG (13 City/17 Highway)

    Listing Information:

    VIN: 3GKEC16Z54G112789
    Stock: 112789
    Certified Pre-Owned: No
    Listed since: 04-04-2026

  • New Listing
    $9,998
    good price
    $1,102 below market
    • 133,682 miles
    • No accidents, 2 owners, personal use only
    • 7 Seats, 12 City / 18 Hwy MPG
    • Campbell Chevrolet of Bowling Green (Bowling Green, KY)
    • AWD/4WD
    • Back-up camera
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Bowling Green, KY / 507 miles away from Ashburn, VA

    2008 GMC Yukon XL Denali 4D Sport Utility Summit White AWD 6-Speed Automatic HD Electronic with Overdrive Vortec 6.2L V8 SFI VVTAt Campbell Chevrole...

    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:

    14 Combined MPG (12 City/18 Highway)

    Listing Information:

    VIN: 1GKFK66888J100197
    Stock: T26244E
    Certified Pre-Owned: No
    Listed since: 04-18-2026

  • Price Drop
    $11,999
    fair price
    $86 below market
    • 98,164 miles
    • No accidents, 2 owners, personal use only
    • 7 Seats, 13 City / 17 Hwy MPG
    • Surf Motors (Vista, CA)
    • Leather Seats
    • Third-row seating
    • Power Driver Seat
    • Tire Pressure Warnin...
    • Upgraded Stereo
    Close

    Located in Vista, CA / 2,237 miles away from Ashburn, VA

    **ALL CREDIT IS OK**Subject to stipulations**This vehicle is in Good Condition Inside and Out!Extended warranties are also available. This vehicle has...

    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:

    14 Combined MPG (13 City/17 Highway)

    Listing Information:

    VIN: 1GKEC16TX4R308447
    Stock: 308447
    Certified Pre-Owned: No
    Listed since: 02-24-2026

  • $9,499
    fair price
    $464 above market
    • 176,420 miles
    • 1 accident, 3 owners, personal use only
    • 7 Seats, 12 City / 18 Hwy MPG
    • Allen Automotive (Grandview, MO)
    • AWD/4WD
    • Leather Seats
    • Third-row seating
    • Power Driver Seat
    • Tire Pressure Warnin...
    Close

    Located in Grandview, MO / 914 miles away from Ashburn, VA

    This car has been inspected and serviced.This Vehicle qualifies for 2 Year, 24,000 Mile Engine and Transmission Warranty for ONLY $799.00. This Warran...

    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:

    14 Combined MPG (12 City/18 Highway)

    Listing Information:

    VIN: 1GKFK66838J226239
    Stock: AA3667
    Certified Pre-Owned: No

  • $8,995
    fair price
    $163 above market
    • 106,000 miles
    • No accidents, 2 owners, personal use only
    • 9 Seats, 13 City / 17 Hwy MPG
    • Ernie's Auto (Waterbury, CT)
    • AWD/4WD
    • Third-row seating
    • Power Driver Seat
    • Tire Pressure Warnin...
    • Multi-Zone Climate C...
    Close

    Located in Waterbury, CT / 293 miles away from Ashburn, VA

    2006 GMX Yukon XL. Reliable 5.3L V8 4X4. 2 owners no accidents. 41 service records. Clean inside and out. Runs and drives great. Emissions done and sa...

    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:

    14 Combined MPG (13 City/17 Highway)

    Listing Information:

    VIN: 1GKFK16Z86J135900
    Stock: 135900
    Certified Pre-Owned: No
    Listed since: 04-10-2026

    • 185,000 miles
    • No accidents, 1 owner, personal use only
    • 7 Seats, 13 City / 17 Hwy MPG
    • Crown Motors of Tallahassee (Tallahassee, FL)
    • Leather Seats
    • Sunroof/Moonroof
    • Third-row seating
    • Power Driver Seat
    • Tire Pressure Warnin...
    Close

    Located in Tallahassee, FL / 710 miles away from Ashburn, VA

    Visit Crown Motors of Tallahassee online at crowntallahassee.com to see more pictures of this vehicle or call us at 850-576-6800 today to schedule 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:

    14 Combined MPG (13 City/17 Highway)

    Listing Information:

    VIN: 3GKEC16Z24G148990
    Stock: A2732
    Certified Pre-Owned: No
    Listed since: 09-26-2025

    • 132,930 miles
    • 2 accidents, 4 owners, personal use
    • 7 Seats, 12 City / 18 Hwy MPG
    • Autosource Hawaii (Honolulu, HI)
    • AWD/4WD
    • Back-up camera
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Honolulu, HI / 4,803 miles away from Ashburn, VA

    Step into the realm of luxury and power with this immaculate 2008 GMC Yukon XL Denali, a true paragon of full-size SUV sophistication. With a mere 100...

    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:

    14 Combined MPG (12 City/18 Highway)

    Listing Information:

    VIN: 1GKFK66808J248215
    Stock: T004835
    Certified Pre-Owned: No

  • $6,900
    great price
    $2,884 below market
    • 174,623 miles
    • No accidents, 5 owners, personal use only
    • 7 Seats, 13 City / 19 Hwy MPG
    • Best Choice Auto Sales Tacoma (Tacoma, WA)
    • AWD/4WD
    • Leather Seats
    • Third-row seating
    • Power Driver Seat
    • Tire Pressure Warnin...
    Close

    Located in Tacoma, WA / 2,302 miles away from Ashburn, VA

    We are your local, trusted source for quality pre-owned vehicles. At Best Choice Auto Sales LLC, we pride ourselves on making the car buying process 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:

    15 Combined MPG (13 City/19 Highway)

    Listing Information:

    VIN: 1GKFK66817J301695
    Stock: 000508
    Certified Pre-Owned: No
    Listed since: 10-31-2025

    • 125,682 miles
    • 2 accidents, 3 owners, taxi vehicle
    • 8 Seats, 13 City / 17 Hwy MPG
    • ZM Auto Group (Willoughby, OH)
    • AWD/4WD
    • Leather Seats
    • Sunroof/Moonroof
    • Third-row seating
    • Power Driver Seat
    Close

    Located in Willoughby, OH / 275 miles away from Ashburn, VA

    2004 GMC Yukon SLT 1500 AWD V8 5.3L Exterior Color Black Interior Color GreyVisit ZM Auto Group LLC to shop our great deals. You can contact us or cal...

    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:

    14 Combined MPG (13 City/17 Highway)

    Listing Information:

    VIN: 3GKFK16T74G153007
    Stock: 286
    Certified Pre-Owned: No
    Listed since: 03-19-2026

    • 85,892 miles
    • 1 accident, 1 owner, personal use only
    • 7 Seats, 12 City / 16 Hwy MPG
    • Hometown Auto Sales (Cedarburg, WI)
    • AWD/4WD
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    • Third-row seating
    Close

    Located in Cedarburg, WI / 621 miles away from Ashburn, VA

    One Owner! Texas Truck Since New! 100% Rust-Free! Only 85k Miles! This 2004 GMC Yukon XL Denali AWD Is In Immaculate Condition Inside and Out. Feature...

    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:

    13 Combined MPG (12 City/16 Highway)

    Listing Information:

    VIN: 1GKFK66U64J267102
    Stock: 2369
    Certified Pre-Owned: No
    Listed since: 03-26-2026

Showing 1 - 21 out of 6,195 listings

Consumer Reviews for the GMC Yukon XL

Read recent reviews for the GMC Yukon XL
Overall Consumer Rating
4.5 out of 5 stars61 Reviews
Write a vehicle reviewSee all 61 reviews
  • 5 star
    (69%)
  • 4 star
    (23%)
  • 3 star
    (8%)
  • 2 star
    (0%)
  • 1 star
    (0%)
5 out of 5 stars

Vortec 6.0 is AMAZING! LOVE This Denali XL.

Barry Gartner, 11/29/2015
2005 GMC Yukon XL 1500 SLE Rwd 4dr SUV (5.3L 8cyl 4A)
The Denali XL is everything you need to get your family up to the Cabin, tow your toys, and more. This vehicle is hands down the best vehicle I have ever owned. It is smooth, powerful, comfortable, and has AWD for towing my Ice-House, Boat, Snowmobiles, and ATV's. The Denali has the Vortec 6.0 but this is essentially the same engine as the 5.3. My Vortec 6.0 has 232,948 miles and does … not burn oil between changes. I have had to perform repairs on this vehicle which I will list but most of them were only after 200,000 and well worth the investment. These vehicles will easily go 400,000 with routine maintenance. Maintenance & Tips: **TIP 1** Buy a blue tooth OBD2 adapter online for $20 and then get the Torque App for your iPhone/Android to monitor/trouble-shoot data and reset error codes. **TIP 2** Change the fluids on this truck regularly. It will pay off in the long run. These trucks will last FOREVER. You can do both the front differential, rear differential, and transfer case very easily/cheap. The same goes for the transmission but that takes about 17 quarts and isn't exactly cheap to do a total flush but it is much cheaper than a whole new transmission. **TIP 3** Search Online for videos for trouble-shooting and repair. I guarantee you will find out how to do many of these repairs yourself/cheap. 1. Transmission may go around 200,000 miles = $3,700 to repair. 2. Rear Air Suspension will go around the same time = $800 to $2,700/Dealer to repair. You do not have to put the Air Suspension rear back in/Kit Replacement. I however Love the air suspension for towing, etc. 3. Passenger Side leak into Heater Blower Motor. This shorts out the Fan. Easy fix, take off the wipers and the plastic grate between the windshield and the hood. There is an oval metal plate with cracked brittle caulk. Reseal this or put another bigger metal plate over this with caulk. TIP: Pull out the wet metal heat sink heater fan control module and dry it out. It will come back to life. No need to spend money on this. 4. DON"T spray off this engine at the Self-Serve Car Wash. Water on the top side will drain down and short out the anti-knock sensors on the top of the intake and you will start throwing codes. I had to replace both (2) anti-knock sensors and the wire harness. 5. The intake gasket will need to be replaced at some point if it has not been already. It will throw lean bank 1 or 2 codes when it is time to replace. I think the original was green and the replacement is orange and a better design. Easy fix, just take your time to do it right. 6. If you start to get a random misfire code when it is hot/towing that only happens when you stop it is the front O2 Sensor. Easy fix. Get on the ground and do it yourself. They sell a cheap tool to remove/replace these. 7. Low Oil Pressure when first started cold. Some of these engines will lose oil pressure when first started COLD. Then as the engine warms the oil pressure will come up to normal. That is your clue. A rubber ring in the oil pickup tube has become brittle and cracked. When it warms up it expands and your oil pressure comes back to normal. FIX: Bring this to a shop with some good old boys who are not afraid of a little work. The front differential can be dropped with two people and a hoist in about 20 minutes/intact. This will grant access to drop the oil pan which has to be removed to get to the oil pump pickup tube so that the rubber o-ring can be replaced. $350 - $550 to repair. Don't take it to the dealership for this one. They will want 1K to fix this and it isn't that hard to do. FINAL TIP: Don't be afraid to work on this vehicle. I have performed every repair on this besides the o-ring replacement and the transmission. Working on this has saved me thousands of dollars and prevented me from having to fork out another 50k for a new vehicle. Don't believe for one second that a new GMC truck with the 6.2 is the answer. People are buying these and having oil burning issues from the factory. Not to mention transmission issues, etc. Newer isn't always better. I for one will be driving my 2005 GMC Denali XL for many years to come. Sincerely, Barry G
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