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  • New Listing
    $29,998
    fair price
    $1,281 below market
    • 33,144 miles
    • 8'2” bed, 5.3l, 8cyl
    • CarMax (In-stock online)
    • Transfer available from GA to AZ*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Upgraded Headlights
    • Power Driver Seat
    Close

    Located in Warner Robins, GA / 1,611 miles away from Apache Junction, AZ

    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 Unavailable.

    Features and Specs:

    Listing Information:

    VIN: 3GTN9AEFXMG235487
    Stock: 27386219
    Certified Pre-Owned: No

    • 24,723 miles
    • No accidents, 1 owner, personal use
    • 5'10” bed, 5.3l, 8cyl
    • CarMax (In-stock online)
    • Transfer available from CA to AZ*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Visalia, CA / 490 miles away from Apache Junction, AZ

    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:

    19 Combined MPG (16 City/22 Highway)

    Listing Information:

    VIN: 3GTU9DEDXMG177120
    Stock: 27002008
    Certified Pre-Owned: No

  • $46,998
    fair price
    $1,518 below market
    • 32,387 miles
    • 1 accident, 1 owner, personal use only
    • 5'10” bed, 5.3l, 8cyl
    • CarMax (In-stock online)
    • Transfer available from TN to AZ*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Knoxville, TN / 1,561 miles away from Apache Junction, AZ

    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: No

    Features and Specs:

    19 Combined MPG (16 City/22 Highway)

    Listing Information:

    VIN: 1GTU9DED4MZ226862
    Stock: 27547217
    Certified Pre-Owned: No

  • New Listing
    • 90,202 miles
    • No accidents, 1 owner, personal use only
    • 5'10” bed, 3l, 6cyl
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Charlotte, NC / 1,751 miles away from Apache Junction, AZ

    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:

    18 Combined MPG (16 City/21 Highway)

    Listing Information:

    VIN: 3GTU9EET2MG348794
    Stock: 2003781135
    Certified Pre-Owned: No
    Listed since: 06-03-2025

  • Advertisement

    Special offers available

    2025 GMC Sierra 1500
    • 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.
    • 53,910 miles
    • No accidents, 2 owners, personal use
    • 5'10” bed, 5.3l, 8cyl
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Dallas, TX / 855 miles away from Apache Junction, AZ

    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:

    18 Combined MPG (16 City/21 Highway)

    Listing Information:

    VIN: 3GTP9EED4MG394200
    Stock: 2003809006
    Certified Pre-Owned: No
    Listed since: 06-18-2025

  • $41,900
    fair price
    $2,362 above market
    • 69,889 miles
    • No accidents, 1 owner, personal use
    • 5'10” bed, 3l, 6cyl
    • Trucks Only - Mesa (17 mi away)
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Mesa, AZ / 17 miles away from Apache Junction, AZ

    Cardinal Red 2021 GMC Sierra 1500 SLT RWD 10-Speed Automatic 3.0L I6Call Trucks Only Apache Junction 4**-6**-5***! No Hidden Charges! Recent Arrival!A...

    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: 1GTP8DET6MZ195136
    Stock: 5-0917
    Certified Pre-Owned: No
    Listed since: 01-10-2025

  • New Listing
    $39,995
    fair price
    $1,713 above market
    • 86,646 miles
    • No accidents, 1 owner, personal use
    • 5'10” bed, 3l, 6cyl
    • Munich Motors (31 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Phoenix, AZ / 31 miles away from Apache Junction, AZ

    ***CLEAN CARFAX*** ***DURAMAX 3.0L TURBO-DIESEL I6*** ***10-SPEED AUTOMATIC*** ***AT4 PREFERRED PACKAGE*** ***POWER SUNROOF*** ***POWER SLIDING REAR G...

    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: 3GTU9EETXMG354701
    Stock: 12107
    Certified Pre-Owned: No
    Listed since: 06-27-2025

  • New Listing
    • 27,195 miles
    • No accidents, 1 owner, personal use only
    • 5'10” bed, 5.3l, 8cyl
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in San Antonio, TX / 817 miles away from Apache Junction, AZ

    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:

    19 Combined MPG (16 City/22 Highway)

    Listing Information:

    VIN: 3GTU9DEDXMG453067
    Stock: 2003792398
    Certified Pre-Owned: No
    Listed since: 06-11-2025

  • Advertisement

    Special offers available

    2025 GMC Sierra 1500
    • 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
    $50,998
    fair price
    $332 below market
    • 30,250 miles
    • 5'10” bed, 3l, 6cyl
    • CarMax (In-stock online)
    • Transfer available from NC to AZ*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Raleigh, NC / 1,864 miles away from Apache Junction, AZ

    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 Unavailable.

    Features and Specs:

    Listing Information:

    VIN: 3GTU9FET0MG206806
    Stock: 27150955
    Certified Pre-Owned: No

  • New Listing
    • 31,658 miles
    • No accidents, 2 owners, personal use only
    • 5'10” bed, 6.2l, 8cyl
    • Rollit Motors (14 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Mesa, AZ / 14 miles away from Apache Junction, AZ

    WARRANTIES up to 96 MONTHS and UNLIMITED MILES with BUMPER to BUMPER COVERAGE available !!! 48 HOUR EXCHANGE POLICY !!! NO COMMISSION SALESPEOPLE !!! ...

    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: 3GTU9FEL6MG411272
    Stock: 411272
    Certified Pre-Owned: No
    Listed since: 04-11-2025

  • Stock photo**
    $41,995
    fair price
    $1,332 below market
    • 86,079 miles
    • No accidents, 1 owner, personal use only
    • 6'7” bed, 3l, 6cyl
    • Michelle's Auto Sales (184 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Yuma, AZ / 184 miles away from Apache Junction, AZ

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    24 Combined MPG (22 City/26 Highway)

    Listing Information:

    VIN: 3GTU9EET8MG257433
    Stock: YM8688
    Certified Pre-Owned: No
    Listed since: 07-04-2025

  • New Listing
    $40,998
    fair price
    $1,381 above market
    • 33,186 miles
    • No accidents, 2 owners, personal use only
    • 5'10” bed, 5.3l, 8cyl
    • CarMax (In-stock online)
    • Transfer available from KY to AZ*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Lexington, KY / 1,547 miles away from Apache Junction, AZ

    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: 3GTU9CED7MG446295
    Stock: 26879175
    Certified Pre-Owned: No

  • Advertisement

    Special offers available

    2025 GMC Sierra 1500
    • 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
    $52,998
    fair price
    $2,361 above market
    • 34,028 miles
    • No accidents, 2 owners, personal use only
    • 5'10” bed, 3l, 6cyl
    • CarMax (In-stock online)
    • Transfer available from CA to AZ*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Pleasanton, CA / 650 miles away from Apache Junction, AZ

    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: Yes

    Features and Specs:

    Listing Information:

    VIN: 3GTU9EET3MG309017
    Stock: 26859424
    Certified Pre-Owned: No

  • New Listing
    $26,495
    fair price
    $676 above market
    • 122,480 miles
    • No accidents, 2 owners, personal use only
    • 5'10” bed, 5.3l, 8cyl
    • Driveway (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Upgraded Headlights
    • Tire Pressure Warnin...
    Close

    Located in Knoxville, TN / 1,569 miles away from Apache Junction, AZ

    CarFax No Accidents Reported,Apple CarPlay,Back-Up Camera,Bluetooth,Chrome Wheels,Heated Seats,Heated Steering Wheel,Keyless Start,Remote Start,Satell...

    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:

    17 Combined MPG (15 City/20 Highway)

    Listing Information:

    VIN: 1GTU9BED0MZ189054
    Stock: MZ189054P
    Certified Pre-Owned: No

  • New Listing
    $34,560
    fair price
    $688 below market
    • 85,955 miles
    • No accidents, 1 owner, personal use only
    • 5'10” bed, 3l, 6cyl
    • Chapman Chevrolet Buick GMC (185 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Yuma, AZ / 185 miles away from Apache Junction, AZ

    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: 3GTU9CET4MG266134
    Stock: G8979A
    Certified Pre-Owned: No
    Listed since: 06-02-2025

  • Price Drop
    • 34,693 miles
    • No accidents, 2 owners, personal use only
    • 5'10” bed, 5.3l, 8cyl
    • CarMax (In-stock online)
    • Transfer available from GA to AZ*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Buford, GA / 1,579 miles away from Apache Junction, AZ

    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: Yes

    Features and Specs:

    Listing Information:

    VIN: 1GTU9CED2MZ408831
    Stock: 27128463
    Certified Pre-Owned: No

  • Advertisement

    Special offers available

    2025 GMC Sierra 1500
    • 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.
    • 77,940 miles
    • No accidents, 1 owner, personal use only
    • 5'10” bed, 5.3l, 8cyl
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Indianapolis, IN / 1,469 miles away from Apache Junction, AZ

    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:

    19 Combined MPG (16 City/22 Highway)

    Listing Information:

    VIN: 3GTU9FED6MG478916
    Stock: 2003829872
    Certified Pre-Owned: No
    Listed since: 06-19-2025

  • Price Drop
    $43,983
    fair price
    $142 above market
    • 42,899 miles
    • No accidents, 2 owners, personal use only
    • 5'10” bed, 6.2l, 8cyl
    • Driveway (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Tampa, FL / 1,762 miles away from Apache Junction, AZ

    CarFax No Accidents Reported,Apple CarPlay,Back-Up Camera,Blind Spot Monitor,Bluetooth,Heated Seats,Heated Steering Wheel,Keyless Start,Lane Departure...

    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: 3GTU9FELXMG441438
    Stock: XMG441438T
    Certified Pre-Owned: No

    • 38,680 miles
    • No accidents, 1 owner, personal use
    • 5'10” bed, 5.3l, 8cyl
    • Carvana (In-stock online)
    • Home delivery*
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in San Antonio, TX / 817 miles away from Apache Junction, AZ

    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:

    19 Combined MPG (17 City/23 Highway)

    Listing Information:

    VIN: 3GTP8FED6MG207905
    Stock: 2003820917
    Certified Pre-Owned: No
    Listed since: 06-26-2025

  • Price Drop
    $45,998
    fair price
    $1,587 above market
    • 38,977 miles
    • No accidents, 2 owners, personal use only
    • 5'10” bed, 5.3l, 8cyl
    • CarMax (In-stock online)
    • Transfer available from WA to AZ*
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Puyallup, WA / 1,106 miles away from Apache Junction, AZ

    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:

    19 Combined MPG (17 City/23 Highway)

    Listing Information:

    VIN: 3GTP8FED7MG236037
    Stock: 27195419
    Certified Pre-Owned: No

  • Price Drop
    $34,590
    fair price
    $570 above market
    • 109,804 miles
    • No accidents, 1 owner, personal use only
    • 5'10” bed, 3l, 6cyl
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Charlotte, NC / 1,751 miles away from Apache Junction, AZ

    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: 3GTU9CETXMG176437
    Stock: 2003778430
    Certified Pre-Owned: No
    Listed since: 06-20-2025

Showing 715 - 735 out of 1,555 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 2021 GMC Sierra 1500 in Apache Junction, AZ Values

Estimated values
2021 GMC Sierra 1500 2dr Regular Cab 4WD LB (5.3L 8cyl 6A) with no options
ConditionTrade-InPrivate PartyDealer Retail
Outstanding$22,623$23,628$24,638
Clean$22,209$23,172$24,138
Average$21,519$22,412$23,306
Rough$20,621$21,424$22,223

The average list price of a used 2021 GMC Sierra 1500 in Apache Junction, Arizona is $41,783. The average mileage on a used GMC Sierra 1500 2021 for sale in Apache Junction, Arizona is 56,415. Based on the average mileage of 56,415 for used 2021 GMC Sierra 1500 for sale in Apache Junction, AZ and using an average vehicle condition rating, which means the vehicle may have a few mechanical and/or cosmetic problems and may require a considerable amount of reconditioning, we appraise the average trade-in value of a used GMC Sierra 1500 2021 in Apache Junction, Arizona to be $21,519.

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