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  • Price Drop
    $18,887
    great price
    $3,049 below market
    • 161,846 miles
    • No accidents, 3 owners, personal use only
    • 5'9” bed, 5.3l, 8cyl
    • Southern Palms Mazda (6 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Royal Palm Beach, FL / 6 miles away from West Palm Beach, FL

    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/22 Highway)

    Listing Information:

    VIN: 3GTU2VEC1FG163384
    Stock: 274238PB
    Certified Pre-Owned: No
    Listed since: 05-21-2025

  • New Listing
    Stock photo**
    $12,500
    great price
    $2,664 below market
    • 182,489 miles
    • No accidents, 3 owners, personal use only
    • 5'9” bed, 5.3l, 8cyl
    • VENE-AUTO (175 mi away)
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Power Driver Seat
    • Tire Pressure Warnin...
    Close

    Located in Tampa, FL / 175 miles away from West Palm Beach, FL

    Introducing the powerful and stylish 2015 GMC Sierra 1500 2WD Crew Cab 143.5 SLT Automatic. This truck boasts a sleek design and a comfortable interio...

    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/23 Highway)

    Listing Information:

    VIN: 3GTP1VEC4FG499711
    Stock: 499711
    Certified Pre-Owned: No
    Listed since: 05-29-2025

  • $14,900
    good price
    $2,124 below market
    • 181,206 miles
    • No accidents, 3 owners, personal use only
    • 5'9” bed, 6.2l, 8cyl
    • Kaiser Buick GMC (175 mi away)
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Power Driver Seat
    Close

    Located in Deland, FL / 175 miles away from West Palm Beach, FL

    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: 3GTU1VEJXFG334313
    Stock: P1932UT
    Certified Pre-Owned: No
    Listed since: 05-07-2025

  • $18,995
    good price
    $1,946 below market
    • 115,257 miles
    • No accidents, 2 owners, personal use only
    • 6'7” bed, 5.3l, 8cyl
    • Sutherlin Nissan Orlando (147 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Orlando, FL / 147 miles away from West Palm Beach, FL

    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/22 Highway)

    Listing Information:

    VIN: 1GTV2VEC5FZ443832
    Stock: P12874A
    Certified Pre-Owned: No
    Listed since: 05-03-2025

  • Advertisement

    Special offers available

    2025 GMC Sierra 1500
    $65,400
    starting MSRP
    • 1 Trim
    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.
  • Price Drop
    $16,099
    fair price
    $132 below market
    • 129,801 miles
    • No accidents, 3 owners, personal use only
    • 6'7” bed, 4.3l, 6cyl
    • Florida Fine Cars Margate (32 mi away)
    • AWD/4WD
    • Tire Pressure Warnin...
    • USB Inputs
    • Trip Computer
    • Rear Bench Seats
    Close

    Located in Margate, FL / 32 miles away from West Palm Beach, FL

    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 (17 City/22 Highway)

    Listing Information:

    VIN: 1GTV2TEH2FZ417155
    Stock: 149990
    Certified Pre-Owned: No
    Listed since: 03-29-2025

  • Price Drop
    $20,881
    fair price
    $833 below market
    • 120,450 miles
    • No accidents, 1 owner, personal use only
    • 5'9” bed, 5.3l, 8cyl
    • Coggin Toyota at the Avenues (254 mi away)
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Power Driver Seat
    Close

    Located in Jacksonville, FL / 254 miles away from West Palm Beach, FL

    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/23 Highway)

    Listing Information:

    VIN: 3GTP1VEC7FG168265
    Stock: CTA251336A
    Certified Pre-Owned: No
    Listed since: 05-26-2025

  • New Listing
    $20,664
    fair price
    $744 below market
    • 123,014 miles
    • No accidents, 1 owner, personal use only
    • 5'9” bed, 5.3l, 8cyl
    • AutoNation Chevrolet West Colonial (151 mi away)
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Power Driver Seat
    Close

    Located in Orlando, FL / 151 miles away from West Palm Beach, FL

    Slt Crew Cab Value PackageWheels; 20" X 9" (50.8 Cm X 22.9 Cm) Polished AluminumAssist Steps; Chromed Tubular; 6" RectangularBose Sound With 6 Spea...

    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/23 Highway)

    Listing Information:

    VIN: 3GTP1VEC6FG422743
    Stock: FG422743
    Certified Pre-Owned: No
    Listed since: 05-31-2025

  • New Listing
    $23,531
    fair price
    $789 below market
    • 100,844 miles
    • No accidents, 4 owners, personal use
    • 5'9” bed, 5.3l, 8cyl
    • AutoNation Ford Sanford (164 mi away)
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Power Driver Seat
    Close

    Located in Sanford, FL / 164 miles away from West Palm Beach, FL

    Slt Crew Cab Value PackageWheels; 20" X 9" (50.8 Cm X 22.9 Cm) Polished AluminumDriver Alert PackageAssist Steps; Chromed Tubular; 6" RectangularS...

    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/23 Highway)

    Listing Information:

    VIN: 3GTP1VEC3FG379088
    Stock: FG379088
    Certified Pre-Owned: No
    Listed since: 05-31-2025

  • Advertisement

    Special offers available

    2025 GMC Sierra 1500
    $65,400
    starting MSRP
    • 1 Trim
    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
    $22,499
    good price
    $1,252 below market
    • 82,295 miles
    • No accidents, 4 owners, personal use only
    • 6'7” bed, 5.3l, 8cyl
    • Automaxx of the Carolinas (437 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Summerville, SC / 437 miles away from West Palm Beach, FL

    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/22 Highway)

    Listing Information:

    VIN: 1GTV2VEC4FZ423619
    Stock: K2912
    Certified Pre-Owned: No
    Listed since: 05-29-2025

  • $17,963
    fair price
    $712 above market
    • 153,777 miles
    • No accidents, 2 owners, personal use only
    • 5'9” bed, 5.3l, 8cyl
    • AutoNation USA Jacksonville (264 mi away)
    • Back-up camera
    • Bluetooth
    • Navigation
    • Tire Pressure Warnin...
    • USB Inputs
    Close

    Located in Jacksonville, FL / 264 miles away from West Palm Beach, FL

    Sle Value PackageSeats; Front 40/20/40 Split-BenchEngine; 5.3L Ecotec3 V8 With Active Fuel Management; Direct InjectionTrailering EquipmentAudio 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: 3GTP1UECXFG465153
    Stock: FG465153
    Certified Pre-Owned: No
    Listed since: 05-13-2025

  • $25,995
    fair price
    $695 below market
    • 68,545 miles
    • 1 accident, 2 owners, corporate fleet vehicle
    • 5'9” bed, 5.3l, 8cyl
    • Harbor City Auto Sales (102 mi away)
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Power Driver Seat
    • Tire Pressure Warnin...
    Close

    Located in Melbourne, FL / 102 miles away from West Palm Beach, FL

    WOW !! 1500 SLT CREW CAB !! RWD !! ONLY 68K ORIGINAL MILES !! SLT PREFERED PACKAGE !! DRIVERS PACKAGE !! PARKING ASSIST !! BOSE PREMIUM AUDIO !! NA...

    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:

    19 Combined MPG (16 City/23 Highway)

    Listing Information:

    VIN: 3GTP1VEC5FG144563
    Stock: 042506
    Certified Pre-Owned: No

  • New Listing
    $21,500
    fair price
    $566 above market
    • 150,557 miles
    • 1 accident, 3 owners, personal use only
    • 5'9” bed, 5.3l, 8cyl
    • Salvage Reseller (29 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Power Driver Seat
    Close

    Located in Coconut Creek, FL / 29 miles away from West Palm Beach, FL

    This vehicle is located at Hueytown, AL Copart yard. All purchases must take place online at www.salvagereseller.com. Visit our website to learn more.

    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:

    18 Combined MPG (16 City/22 Highway)

    Listing Information:

    VIN: 3GTU2VEC6FG360924
    Stock: 51927355
    Certified Pre-Owned: No
    Listed since: 05-31-2025

  • Advertisement

    Special offers available

    2025 GMC Sierra 1500
    $65,400
    starting MSRP
    • 1 Trim
    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.
    • 125,961 miles
    • No accidents, 1 owner, personal use only
    • Victory Auto Group (33 mi away)
    • Front seat upholster...
    • Heated Seats
    • Backup Camera
    • Keyless Entry
    • Bluetooth Wireless
    Close

    Located in Stuart, FL / 33 miles away from West Palm Beach, FL

    Victory Auto Store is a family pre-owned car dealership. The store has been operating since 2011. We are located in Stuart, Florida - the 'Sailfish Ca...

    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: 3GTU2VEC0FG263072
    Stock: C24-396
    Certified Pre-Owned: No
    Listed since: 04-28-2025

  • New Listing
    • 94,038 miles
    • No accidents, 1 owner, personal use only
    • 5'9” bed, 5.3l, 8cyl
    • CarMax Ft. Lauderdale (43 mi away)
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Power Driver Seat
    Close

    Located in Davie, FL / 43 miles away from West Palm Beach, FL

    CarMax values transparency and wants you to love your next car, not settle on it. Certain vehicles may have unrepaired safety recalls. Check nhtsa.gov...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    Listing Information:

    VIN: 3GTP1UEC8FG266926
    Stock: 27048574
    Certified Pre-Owned: No

  • Price Drop
    $12,998
    great price
    $3,542 below market
    • 168,140 miles
    • 2 accidents, 5 owners, personal use
    • 6'7” bed, 5.3l, 8cyl
    • Florida Fine Cars (51 mi away)
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Power Driver Seat
    • Tire Pressure Warnin...
    Close

    Located in Miami, FL / 51 miles away from West Palm Beach, FL

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: No

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    19 Combined MPG (16 City/23 Highway)

    Listing Information:

    VIN: 3GTP1VEC9EG209770
    Stock: 127520
    Certified Pre-Owned: No
    Listed since: 02-18-2025

  • New Listing
    Stock photo**
    • 106,505 miles
    • No accidents, 1 owner, personal use only
    • 5'9” bed, 5.3l, 8cyl
    • Hilton Head Buick GMC (386 mi away)
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Power Driver Seat
    • Tire Pressure Warnin...
    Close

    Located in Bluffton, SC / 386 miles away from West Palm Beach, FL

    2015 Sierra 1500 SLE 6-Speed Automatic Electronic with Overdrive, Jet Black/Dark Ash Cloth. CARFAX One-Owner. RWD Clean CARFAX. EcoTec3 5.3L V8 6-Spee...

    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: 3GTP1UECXFG271948
    Stock: FG271948
    Certified Pre-Owned: No
    Listed since: 05-29-2025

  • Advertisement

    Special offers available

    2025 GMC Sierra 1500
    $65,400
    starting MSRP
    • 1 Trim
    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.
    • 119,816 miles
    • No accidents, 3 owners, corporate fleet vehicle
    • 8'2” bed, 5.3l, 8cyl
    • Auto Boutique Florida (263 mi away)
    • Tire Pressure Warnin...
    • USB Inputs
    • Upgraded Engine
    • Trip Computer
    • Stability Control
    Close

    Located in Jacksonville, FL / 263 miles away from West Palm Beach, FL

    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: 1GTN1TEC2FZ901978
    Stock: 18753A
    Certified Pre-Owned: No
    Listed since: 05-19-2025

    • 90,761 miles
    • 1 accident, 1 owner, personal use only
    • 5'9” bed, 5.3l, 8cyl
    • Lee Auto Group Tampa (164 mi away)
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Power Driver Seat
    Close

    Located in Tampa, FL / 164 miles away from West Palm Beach, FL

    Encompassing capability, strength, and refined luxury, our 2015 GMC Sierra 1500 Denali Crew Cab 4X2 is presented in Onyx Black. Motivated by a 5.3 Lit...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: No

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    19 Combined MPG (16 City/23 Highway)

    Listing Information:

    VIN: 3GTP1WEC6FG508883
    Stock: T2942
    Certified Pre-Owned: No
    Listed since: 02-12-2025

    • Not provided
    • 1 accident, 3 owners, personal use only
    • 5'9” bed, 5.3l, 8cyl
    • Salvage Reseller (29 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Power Driver Seat
    Close

    Located in Coconut Creek, FL / 29 miles away from West Palm Beach, FL

    This vehicle is located at Lebanon, TN Copart yard. Join our online auctions to see its final price. All purchases must take place online at www.salva...

    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:

    18 Combined MPG (16 City/22 Highway)

    Listing Information:

    VIN: 3GTU2VECXFG458290
    Stock: 57035645
    Certified Pre-Owned: No
    Listed since: 05-21-2025

    • 155,482 miles
    • 1 accident, 5 owners, personal use only
    • 5'9” bed, 5.3l, 8cyl
    • Ford of Kendall (76 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Miami, FL / 76 miles away from West Palm Beach, FL

    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:

    18 Combined MPG (16 City/22 Highway)

    Listing Information:

    VIN: 3GTU2VEC8FG399630
    Stock: FG399630A
    Certified Pre-Owned: No
    Listed since: 03-09-2025

  • $9,075
    great price
    $1,824 below market
    • 241,216 miles
    • 1 accident, 2 owners, personal use only
    • 5'9” bed, 4.3l, 6cyl
    • Salvage Reseller (29 mi away)
    • Back-up camera
    • Bluetooth
    • Tire Pressure Warnin...
    • USB Inputs
    • Trip Computer
    Close

    Located in Coconut Creek, FL / 29 miles away from West Palm Beach, FL

    This vehicle is located at Prairie Grove, AR Copart yard. All purchases must take place online at www.salvagereseller.com. Visit our website to learn ...

    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:

    20 Combined MPG (18 City/24 Highway)

    Listing Information:

    VIN: 3GTP1UEH0EG273332
    Stock: 55670805
    Certified Pre-Owned: No
    Listed since: 05-17-2025

Showing 1 - 21 out of 2,556 listings

Consumer Reviews for the GMC Sierra 1500

Read recent reviews for the GMC Sierra 1500
Overall Consumer Rating
3.4 out of 5 stars72 Reviews
Write a vehicle reviewSee all 72 reviews
  • 5 star
    (33%)
  • 4 star
    (24%)
  • 3 star
    (11%)
  • 2 star
    (10%)
  • 1 star
    (22%)
5 out of 5 stars

2015 GMC Sierra 1500 Crew Cab SLT

papanav, 11/02/2014
2015 GMC Sierra 1500 SLT 4dr Crew Cab 5.8 ft. SB (5.3L 8cyl 6A)
Purchased a 2015 Sierra 1500 SLT (crew cab) and traded in my 2014 Sierra 1500 SLE (double cab). I usually keep a vehicle for 10 years or more however, the only reason I traded was because of the very good incentive on the 2015 and the excellent deal I had gotten on the 2014 and the reasonable trade in price on the 2014. I now have 13,000 miles on the 2015 and feel that it is also an … excellent truck with many more amenities. The safety features to include back-up camera, parking warning, lane changing, navigation and hands free make for a very safe truck. I have not been able to attain quite the mileage I got on my 2014 even though I have a tonneau cover and drive the truck in a similar manner. The best I have been able to attain is 21.6 on a long trip. The advantage of a large vehicle with plenty of interior comfort, good mileage numbers, tons of room for luggage and smooth ride made this vehicle my vehicle of choice over a sedan or suv. I will add on to the information above which has not changed. I took a long trip to Michigan and pretty much backed up what I ha determined in the first review that I sent to you. I did attain 22mpg on one leg of the trip and 21.5 on the second leg of the trip. Truck still very comfortable, spacious and has given me absolutely no problems. I have had the oil, filter and tires rotated on schedule and had one recall corrected on the airbag system. I have owned the truck now for 25 months and still feel that it is a nice looking well made vehicle. I took a recent trip and was able to get 23.0 mpg which is slightly higher than advertised. The sweet spot is right about 70mph when the 5.3L engine is in 4v and on flat terrain. In that configuration it gets excellent mileage. The other sweet spot is driving a steady 55mph when the truck is in 4v. Presently I have 22,500 miles on the odometer and I am very satisfied with the vehicle. This is my third review after owning the truck for two and a half years. I have over 27,000 miles on the truck so far with no problems. I did notice that my transmission temp was running much hotter than the allison transmission that I have in my diesel but in looking into it further I found that 190 degrees is not an unusual temperature for this engine and transmission combination. This is my fourth review of my Sierra 1500 Crew Cab with just over 37,000 miles. So far so good, the truck continues to run very well with no complaints.. I changed the oil and filter myself and was surprised to see that the 5.3 liter engine takes 8.5 quarts of 0w-20 oil. In looking at the new GMC Sierra's as well as Ford and Ram 1500 series trucks I am amazed at how many gadgets they have placed in these vehicles with a corresponding price increase. Almost all of these vehicles are now priced in the mid 60 thousand dollar price range and the manufacturers are offering 10 year financing. Unbelievable!!! I recently replaced all four tires at 46,000 miles. They were original equipment and wore well. They were Goodyear Wrangler 275/55R20's. There was still probably 10.000 miles of wear left but I am not sure they would have been good for winter 9 months from now. My first check engine light came on indicating an evaporations leak code po455. I replaced the gas cap which of course did not fix it so I will find out what the problem is when I get the truck inspected this month. The evap system leak was found and determined to be a crack in a hose that was replaced and check engine light disappeared. I have taken trips using the range plug in unit that keeps my engine running on 8 cylinders all the time and I still was getting 21.5 mpg. Still no problems to speak of and still a handsome truck. At 51,000 miles I had all the fluids changed to include transmission, coolant, differential and transaxles. I now have 63,000 on the truck. I did have to replace the battery about 6 months ago but other than that absolutely no problems.
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Used 2015 GMC Sierra 1500 in West Palm Beach, FL Values

Estimated values
2015 GMC Sierra 1500 SLT 4dr Crew Cab 4WD 5.8 ft. SB (5.3L 8cyl 6A) with no options
ConditionTrade-InPrivate PartyDealer Retail
Outstanding$15,754$20,103$22,965
Clean$15,144$19,281$21,977
Average$14,128$17,912$20,331
Rough$12,806$16,132$18,192

The average list price of a used 2015 GMC Sierra 1500 in West Palm Beach, Florida is $19,691. The average mileage on a used GMC Sierra 1500 2015 for sale in West Palm Beach, Florida is 127,238. Based on the average mileage of 127,238 for used 2015 GMC Sierra 1500 for sale in West Palm Beach, FL 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 2015 in West Palm Beach, Florida to be $14,128.

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