Skip to main content
Skip to Filters
203 listings
    • 160,100 miles
    • No accidents, 2 owners, personal use only
    • 8'2” bed, 8cyl
    • Diesel of Houston (128 mi away)
    • Back-up camera
    • Bluetooth
    • Power Driver Seat
    • Parking sensors
    • USB Inputs
    Close

    Located in Houston, TX / 128 miles away from Austin, TX

    2012 GMC SIERRA 3500HD SLE 4X2 2-OWNERS - TEXAS TRUCK 100% CLEAN TITLE & CARFAX HISTORY FRESH TRADE IN FROM CHEVROLET DEALER 6.6L LML DURAMAX TURBO DI...

    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: 1GT413C80CF169597
    Stock: 169597
    Certified Pre-Owned: No
    Listed since: 05-14-2025

  • New Listing
    • 64,994 miles
    • No accidents, 1 owner, personal use only
    • Carsandpickups.com (119 mi away)
    • Upgraded Engine
    • Towing Hitch
    Close

    Located in Katy, TX / 119 miles away from Austin, TX

    Stock:261447****$102,835 MSRP Window Sticker**6.6L Duramax V8 Turbo Diesel Engine**Allison Automatic Transmission**Crew Cab Denali Edition**Brand New ...

    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: 1GT49YEY9RF261447
    Stock: 261447
    Certified Pre-Owned: No
    Listed since: 07-21-2025

    • 56,379 miles
    • No accidents, 1 owner, personal use only
    • Tony T CDJR of Gulfgate (152 mi away)
    • Upgraded Engine
    • Towing Hitch
    Close

    Located in Houston, TX / 152 miles away from Austin, TX

    CARFAX One-Owner. FOR THE BEST PRICE ON THE BEST CARS AROUND AND A SALES EXPERIENCE YOU WON'T REGRET HASSLE FREE! CHECK OUT ALL THESE GREAT OPTIONS Go...

    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: 1GT49YEY2RF292880
    Stock: G250054A
    Certified Pre-Owned: No
    Listed since: 07-15-2025

  • New Listing
    • 90,423 miles
    • No accidents, 1 owner, personal use only
    • 6'7” bed, 6.6l, 8cyl
    • Emmons Motor Company (164 mi away)
    • AWD/4WD
    • Bluetooth
    • Leather Seats
    • Power Driver Seat
    • Parking sensors
    Close

    Located in Webster, TX / 164 miles away from Austin, TX

    Disclaimer TO BEST SERVE OUR CUSTOMERS PLEASE CALL TO SCHEDULE AN APPOINTMENT!!!!! All of our vehicles have been rigorously inspected and are worry-fr...

    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: 1GT423C86CF239410
    Stock: 49396
    Certified Pre-Owned: No
    Listed since: 03-31-2025

    • 77,471 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Indianapolis, IN / 925 miles away from Austin, TX

    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: 1GT49VEY0NF134465
    Stock: 2003716698
    Certified Pre-Owned: No
    Listed since: 05-21-2025

    • 84,131 miles
    • No accidents, 1 owner, personal use only
    • Driveway (165 mi away)
    • Home delivery*
    • Upgraded Engine
    • Towing Hitch
    • Audio and cruise con...
    Close

    Located in Fort Worth, TX / 165 miles away from Austin, TX

    CarFax No Accidents Reported,CarFax 1-Owner,Rare Find,Apple CarPlay,Back-Up Camera,Bluetooth,Keyless Start,Satellite Radio,Tow Hitch,Turbo/Supercharge...

    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: 1GT49SEYXRF257744
    Stock: 10677IV
    Certified Pre-Owned: No

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

    Located in East Hartford, CT / 1,602 miles away from Austin, TX

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

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    Listing Information:

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

  • Price Drop
    • 68,252 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Driveway (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Roseburg, OR / 1,659 miles away from Austin, TX

    CarFax No Accidents Reported,Rare Find,Apple CarPlay,Back-Up Camera,Heated Seats,Heated Steering Wheel,Leather Seats,Navigation System,Remote Start,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:

    Listing Information:

    VIN: 1GT49UEY0NF239033
    Stock: 1920A
    Certified Pre-Owned: No

  • Stock photo**
    • 30,011 miles
    • No accidents, 1 owner, personal use only
    • Waxahachie Dodge Chrysler Jeep Ram (157 mi away)
    • Sunroof/Moonroof
    • Upgraded Engine
    • Adaptive Cruise Cont...
    • Heads up display
    Close

    Located in Waxahachie, TX / 157 miles away from Austin, TX

    Titanium Rush Metallic 2024 GMC Sierra 3500HD Denali Duramax 6.6L V8 Turbodiesel 4WD 10-Speed Automatic 10-Speed Automatic, 4WD, Jet Black Leather.2...

    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: 1GT49WEYXRF140124
    Stock: FC85773AA
    Certified Pre-Owned: No
    Listed since: 05-21-2025

  • New Listing
    • 63,865 miles
    • No accidents, 2 owners, personal use only
    • 8'2” bed, 6.6l, 8cyl
    • Ford of Boerne (68 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Boerne, TX / 68 miles away from Austin, TX

    Priced below KBB Fair Purchase Price!Recent Arrival!10-Speed Automatic, 4WD, Black Cloth.START YOUR JOURNEY AT THE ALL NEW FORD OF PLEASANTON! GUARANT...

    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: 1GT59TEY4NF255993
    Stock: P2595
    Certified Pre-Owned: No
    Listed since: 07-19-2025

  • Stock photo**
    • 31,744 miles
    • No accidents, 1 owner, personal use only
    • Big Star Buick GMC (168 mi away)
    • Upgraded Engine
    Close

    Located in Baytown, TX / 168 miles away from Austin, TX

    10-Speed Automatic, 4WD, Black Leather, 12-Way Power Driver Seat Adjuster w/Lumbar, 12-Way Power Passenger Seat Adjuster w/Lumbar, 120 Point Safety In...

    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: 1GT49WEY0RF350280
    Stock: P350280
    Certified Pre-Owned: Yes
    Listed since: 07-02-2025

  • New Listing
    • 54,982 miles
    • No accidents, 1 owner, personal use only
    • Arrow Ford (192 mi away)
    • Back-up camera
    • Sunroof/Moonroof
    • Upgraded Engine
    • Heads up display
    • Towing Hitch
    Close

    Located in Abilene, TX / 192 miles away from Austin, TX

    White Frost Tricoat 2022 GMC Sierra 3500HD Denali 4D Crew CabCARFAX One-Owner. This vehicle comes with the following features and options : Denali Ult...

    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: 1GT49WEYXNF132759
    Stock: 1D32759
    Certified Pre-Owned: No
    Listed since: 06-29-2025

    • 72,855 miles
    • 1 accident, 1 owner, personal use only
    • DeMontrond Buick GMC (139 mi away)
    • Sunroof/Moonroof
    • Upgraded Engine
    • Adaptive Cruise Cont...
    • Heads up display
    • Towing Hitch
    Close

    Located in Houston, TX / 139 miles away from Austin, TX

    At DeMontrond Buick GMC, we’re committed to delivering a trusted, family-owned dealership experience in Houston. Since 1953, our mission has been to p...

    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: 1GT49WEYXRF136039
    Stock: TRF136039
    Certified Pre-Owned: No
    Listed since: 07-09-2025

    • 5,055 miles
    • No accidents, 1 owner, personal use only
    • 8'2” bed, 6.6l, 8cyl
    • IMD MOTORS (188 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Dallas, TX / 188 miles away from Austin, TX

    Diesel powered, our 2025 GMC Sierra 3500 Denali Ultimate Crew Cab 4X4 Dually is at the pinnacle of Pro Grade luxury and capability in White Frost Tric...

    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: 1GT4UYEY0SF131061
    Stock: SF131061
    Certified Pre-Owned: No
    Listed since: 06-14-2025

  • New Listing
    $67,990
    fair price
    $4,960 below market
    • 34,886 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Charlotte, NC / 1,040 miles away from Austin, TX

    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: 1GT49VEY8PF219654
    Stock: 2003863320
    Certified Pre-Owned: No
    Listed since: 07-19-2025

    • 52,175 miles
    • No accidents, 1 owner, personal use only
    • 8'2” bed, 6.6l, 8cyl
    • Pee Wee Cray (171 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Upgraded Headlights
    • Blind Spot Monitorin...
    Close

    Located in Weatherford, TX / 171 miles away from Austin, TX

    Buckle up and get ready for a seamless blend of power and style with this striking 2023 GMC Sierra 3500HD in a pristine white hue. This truck is a tru...

    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: 1GT49SEY2PF255788
    Stock: 255788
    Certified Pre-Owned: No
    Listed since: 03-26-2025

  • New Listing
    • 91,894 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Martin Chrysler Dodge Jeep Ram (157 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Cleveland, TX / 157 miles away from Austin, TX

    Dealer Ebony Twilight Metallic 2023 GMC Sierra 3500HD AT4 4WD 10-Speed Automatic Duramax 6.6L V8 Turbodiesel 10-Speed Automatic, 4WD, Jet Black With...

    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: 1GT49VEY3PF139307
    Stock: 139307T
    Certified Pre-Owned: No
    Listed since: 06-08-2025

  • Price Drop
    $66,995
    fair price
    $1,652 above market
    • 27,945 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Driveway (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Boise, ID / 1,372 miles away from Austin, TX

    CarFax No Accidents Reported,Rare Find,Apple CarPlay,Back-Up Camera,Bluetooth,Heated Seats,Heated Steering Wheel,Keyless Start,Leather Seats,Navigatio...

    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: 1GT49VEY1PF138432
    Stock: 1303P
    Certified Pre-Owned: No

  • New Listing
    • 36,124 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Neessen Chevrolet Buick GMC (192 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Kingsville, TX / 192 miles away from Austin, TX

    This GMC Sierra 3500HD boasts a Turbocharged Diesel V8 6.6L/ engine powering this Automatic transmission. WINTER GRILLE COVER, WHEELS, 20" (50.8 CM) M...

    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: 1GT49WEY1PF194375
    Stock: 6911
    Certified Pre-Owned: No
    Listed since: 03-19-2025

  • New Listing
    Stock photo**
    • 18,000 miles
    • No accidents, 1 owner, personal use only
    • 8'2” bed, 6.6l, 8cyl
    • McDavid Ford (172 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Fort Worth, TX / 172 miles away from Austin, TX

    RECALL NOTICE: Some vehicles offered for sale may be subject to unrepaired manufacturer safety recalls. To determine the recall status of a vehicle, 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: 1GT49WEY5PF218483
    Stock: MFF251510A
    Certified Pre-Owned: No
    Listed since: 06-19-2025

  • $59,999
    fair price
    $1,727 above market
    • 69,118 miles
    • No accidents, 1 owner, personal use only
    • 6'10” bed, 6.6l, 8cyl
    • Driveway (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Kennewick, WA / 1,591 miles away from Austin, TX

    CarFax No Accidents Reported,Rare Find,Apple CarPlay,Back-Up Camera,Bluetooth,Heated Seats,Heated Steering Wheel,Keyless Start,Leather Seats,Navigatio...

    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: 1GT49VEY0PF190554
    Stock: PF190554A
    Certified Pre-Owned: No

Showing 106 - 126 out of 203 listings

Consumer Reviews for the GMC Sierra 3500HD

Read recent reviews for the GMC Sierra 3500HD
Overall Consumer Rating
3.1 out of 5 stars7 Reviews
Write a vehicle reviewSee all 7 reviews
  • 5 star
    (29%)
  • 4 star
    (29%)
  • 3 star
    (0%)
  • 2 star
    (14%)
  • 1 star
    (29%)
4 out of 5 stars

The designers and engineers should drive it more

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

Used 2012 GMC Sierra 3500HD in Austin, TX Values

Estimated values
2012 GMC Sierra 3500HD SLE 4dr Crew Cab LB (6.0L 8cyl 6A) with no options
ConditionTrade-InPrivate PartyDealer Retail
Outstanding$14,404$21,907$26,217
Clean$13,683$20,701$24,647
Average$12,481$18,691$22,030
Rough$10,919$16,078$18,628

The average list price of a used 2012 GMC Sierra 3500HD in Austin, Texas is $61,023. The average mileage on a used GMC Sierra 3500HD 2012 for sale in Austin, Texas is 59,483. Based on the average mileage of 59,483 for used 2012 GMC Sierra 3500HD for sale in Austin, TX and using an average vehicle condition rating, which means the vehicle may have a few mechanical and/or cosmetic problems and may require a considerable amount of reconditioning, we appraise the average trade-in value of a used GMC Sierra 3500HD 2012 in Austin, Texas to be $12,481.

Filters
Skip to Results

Applied Filters4Active

Location

Search radius200 miles
Search radius

Make & Model

Year

New / Used

Price & Payments

Price Rating

Truck Details

Mileage

Accidents & History

Engine & Drivetrain

Exterior Color

Interior Color

Total Seating

Edmunds Review

Features

Options & Packages

Listing Details


* Delivery of any kind does not apply to Alaska and Hawaii. Contact the dealer for delivery details, restrictions and costs.