Pre-Owned
2015
GMC
Sierra 2500 HD
Denali
- AutoNation 1Price $29,988
See Important Disclosures Here
Pre-Owned
2015
GMC
Sierra 2500 HD
Denali
Dealership Photos
Manufacturer Photos
May not represent actual vehicle (options, colors, trim and body style may vary).
Current Offers
- AutoNation 1Price $29,988
Available Specials
- Pre-Owned Specials 1
Click here for more offer information
1SEE DEALER FOR COMPLETE DETAILS
Specifications
- Location AutoNation GMC Mendenhall
- Miles 196,682
- Stock Number FF502355
- Exterior Onyx Black
- Interior Jet Black
- Transmission Automatic
- Engine 6.6 Liter Turbo
- Model Code TK25743
- VIN 1GT120E8XFF502355
Last one available
Specifications
Entertainment
- Audio system, 8" Diagonal Color Touch Screen Navigation with IntelliLink, AM/FM/SiriusXM with USB ports auxiliary jack, SD card slot, Bluetooth streaming audio for music and most phones, hands-free smartphone integration, Pandora Internet radio and voice-activated technology for radio and phone
- Bluetooth for phone, personal cell phone connectivity to vehicle audio system
- Bose Sound with 6 speaker system (7 speaker system including subwoofer when ordered with bucket seats).
- Single-slot CD/MP3 player (Replaced by (U42) rear seat DVD/Blu-Ray Entertainment Package when (U42) is ordered.)
- SiriusXM Satellite Radio is standard on nearly all 2015 GM models. Enjoy a 3-month All Access trial subscription with over 150 channels including commercial-free music, plus sports, news and entertainment. Plus you can listen to SiriusXM Internet Radio everywhere on your computer, smartphone or tablet. Welcome to the world of SiriusXM. (IMPORTANT: The SiriusXM Satellite Radio trial package is not provided on vehicles that are ordered for Fleet Daily Rental ("FDR") use. If you decide to continue listening after your trial, the subscription plan you choose will automatically renew and you will be charged according to your chosen payment method at then-current rates. Fees and taxes apply. To cancel you must call us at 1-866-635-2349. See our Customer Agreement for complete terms at www.siriusxm.com. All fees and programming subject to change.)
Exterior
- Bed Liner, Spray-on Pickup box bed liner consisting of high pressure, chemically bonded, sprayed-on polyurea & polyurethane liner formulation. Liner is permanently bonded to the truck bed providing a water tight seal. Includes embossed Denali logo on front bed wall. The textured, nonskid surface is black in color and robotically applied to yield consistent 90 mil floor and tailgate thickness along with 50 mil box sidewall thickness. Spray-on liner covers entire bed interior surface below side rails, including tailgate, front box top rail, gauge hole plugs and lower tie down loops. (Not available with (VBN) bed rug, LPO or (VZX) bed liner, LPO.)
- Bumper, front, body-color
- Bumper, rear body-color with bumper CornerSteps
- CornerStep, rear bumper
- Door handles, chrome
- Fog lamps, front, halogen
- Glass, deep-tinted
- Headlamps, halogen projector with LED signature
- LED Lighting, cargo box with switch on center switch bank
- LPO, Assist steps, chromed tubular, 6" rectangular (dealer-installed) (May be substituted with (VXJ) assist steps, LPO. (VXH) is deleted when (VXJ) assist steps, LPO is specified.)
- Lamps, cargo area, cab mounted with switch on center switch bank
- Mirror caps, chrome
- Mirrors, outside chrome cap, heated power-adjustable, power-folding and driver-side auto-dimming with integrated turn signal indicators and puddle lamps (includes driver's side spotter mirror)
- Moldings, bodyside, chrome
- Tailgate and bed rail protection caps, top
- Tailgate, EZ-Lift and Lower
- Tailgate, locking, utilizes same key as ignition and door (Deleted with (ZW9) pickup box delete.) (Deleted when (ZW9) pickup box delete is ordered.)
- Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
- Tires, LT265/60R20E all-terrain, blackwall
- Wheel, 18" x 8" (45.7 cm x 20.3 cm) full-size, steel spare Spare not included with (ZW9) pickup box delete unless a spare tire is ordered. (Requires 18" or 20" wheels and tires.)
- Wheelhouse liners, rear
- Wheels, 20" (50.8 cm) chromed cast aluminum
Interior
- Air conditioning, dual-zone automatic climate control
- Assist handle, front passenger and driver on A-pillars
- Console, floor mounted, reconfigurable with moveable cup holders, cell phone storage, power cord management and hanging file holder capability
- Cruise control, steering wheel-mounted
- Defogger, rear-window electric
- Display, customizable driver display, 8" multi-color configurable
- Door locks, power
- Floor covering, color-keyed carpeting
- Floor mats, color-keyed carpeted first and second row
- Front and Rear Park Assist, Ultrasonic
- Instrumentation, 6-gauge cluster featuring speedometer, fuel level, engine temperature, tachometer, voltage and oil pressure
- Mirror, inside rearview auto-dimming
- OnStar Directions and Connections plan for 6 months including Automatic Crash Response, Stolen Vehicle Assistance, Roadside Assistance and Turn-by-Turn Navigation (Visit www.onstar.com for vehicle availability, details and system limitations. Services may vary by model and conditions.)
- OnStar with 4G LTE provides a built-in Wi-Fi hotspot to connect to the internet at 4G LTE speeds (Visit www.onstar.com for vehicle availability, details and system limitations. Services and connectivity may vary by model and conditions. 4G LTE service available in select markets. 4G LTE performance based on industry averages and vehicle systems design. Some services require data plan.)
- Pedals, power-adjustable
- Power outlet, 110-volt AC
- Remote Keyless Entry
- Remote vehicle starter system
- Seat trim, Perforated leather-appointed
- Seat, rear 60/40 folding bench (folds up), 3-passenger (includes child seat top tether anchor)
- Seats, front full-feature leather-appointed bucket with (KA1) heated seat cushions and seat backs. Includes 12-way power driver and front passenger seat adjusters, including 2-way power lumbar control, 2-position driver memory, adjustable head restraints, (D07) floor console and storage pockets.
- Seats, heated and cooled perforated leather-appointed front bucket
- Steering column, manual Tilt-Wheel and telescoping
- Steering wheel audio controls
- Steering wheel, heated, leather wrapped with audio and cruise controls
- Theft-deterrent system, unauthorized entry
- Universal Home Remote (Not included when (VYU) Snow Plow Prep Package is ordered.)
- Visors, driver and front passenger illuminated vanity mirrors
- Window, power, rear sliding with rear defogger (Not included when (VYU) Snow Plow Prep Package is ordered.)
- Windows, power with driver express up and down and express down on all other windows
Mechanical
- Air cleaner, high-capacity
- Alternator, 150 amps
- Battery, heavy-duty 720 cold-cranking amps/80 Amp-hr, maintenance-free with rundown protection and retained accessory power
- Brakes, 4-wheel antilock, 4-wheel disc with DuraLife brake rotors
- Cargo tie downs (4), movable upper
- Cooling, auxiliary external transmission oil cooler
- Cooling, external engine oil cooler
- Differential, heavy-duty locking rear
- Engine, Vortec 6.0L Variable Valve Timing V8 SFI E85-compatible, FlexFuel capable of running on unleaded or up to 85% ethanol (360 hp [268.4 kW] @ 5400 rpm, 380 lb-ft of torque [515.0 N-m] @ 4200 rpm)
- Exhaust, aluminized stainless-steel muffler and tailpipe
- Four wheel drive
- Frame, fully-boxed, hydroformed front section
- GVWR, 9500 lbs. (4309 kg) (Requires (L96) Vortec 6.0L V8 SFI engine and 2500HD model.)
- Pickup box
- Rear axle, 4.10 ratio (Requires (L96) Vortec 6.0L V8 SFI engine.)
- Recovery hooks, front, frame-mounted, black
- Steering, Recirculating Ball
- Suspension Package, Standard includes 51mm twin tube shock absorbers and 33mm front stabilizer bar
- Trailer brake controller, integrated
- Trailering equipment Trailering hitch platform 2.5" with a 2.0" insert for HD, 7-wire harness with independent fused trailering circuits mated to a 7-way sealed connector to hook up parking lamps, backup lamps, right and left turn signals, an electric brake lead, battery and a ground, The trailer connector also includes the 4-way for use on trailers without brakes - park, brake/turn lamps
- Transfer case, electronic shift with rotary dial controls (Requires 4WD models.)
- Transmission, 6-speed automatic, heavy-duty, electronically controlled with overdrive and tow/haul mode. Includes Cruise Grade Braking and Powertrain Grade Braking (Requires (L96) Vortec 6.0L V8 SFI engine.)
- Underbody Shield, frame-mounted shields includes front underbody shield starting behind front bumper and running to first cross-member, protecting front underbody, oil pan, differential case and transfer case
Safety
- Air bags, single-stage frontal and thorax side-impact, driver and front passenger, and head curtain side-impact, front and rear outboard seating positions (Always use safety belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)
- Daytime Running Lamps with automatic exterior lamp control
- Rear Vision Camera with dynamic guide lines
- StabiliTrak, stability control system with Proactive Roll Avoidance and traction control includes electronic trailer sway control and hill start assist
- Tire Pressure Monitoring System (does not apply to spare tire)
Featured Equipment
- (D07) Floor Console And Storage Pockets. (Std)
- (Mw7) Allison 1000 6-Speed Automatic Transmission And (Y65) Driver Alert Package *Gross*
- 000 Lbs. (4536 Kg) (Requires (Lml) Duramax 6.6L Turbo Diesel V8 Engine.)
- 10
- 2-Position Driver Memory
- 20" (50.8 Cm) Chromed Cast Aluminum (Std)
- 2015 Interim Processing Code
- 3.73 Ratio (Standard And Only Available With (Lml) Duramax 6.6L Turbo Diesel V8 Engine.)
- 765 Lb-Ft Of Torque [1032.8 N-M] @ 1600 Rpm) Includes (K40) Exhaust Brake. (Included And Only Available With (Pch) Duramax Plus Package. Requires (Gt4) 3.73 Rear Axle Ratio And (K05) Engine Block Heater.)
- 8" Diagonal Color Touch Screen Navigation With Intellilink
- AM/FM/SiriusXM With Usb Ports Auxiliary Jack
- Adjustable Head Restraints
- Allison 1000 6-Speed Automatic
- And Safety Alert Seat (Included With (Pch) Duramax Plus Package.)
- Audio System
- B20-Diesel Compatible (397 Hp [296.0 Kw] @ 3000 Rpm
- Bedside Decal
- Blackwall (Std)
- Bluetooth Streaming Audio For Music And Most Phones
- Chrome. Includes Integrated Turn Signal Indicators Consisting Of 51 Square Inch Flat Mirror Surface Positioned Over A 24.5 Square Inch Convex Mirror Surface With A Common Head And Lower Convex Spotter Glass (Convex Glass Is Not Heated And Not Power-Adjustable) And Addition Of Auxiliary Cargo Lamp For Backing Up (Helps To See Trailer When Backing Up With A Trailer) And Amber Auxiliary Clearance Lamp
- Cooled Front Seat(S)
- Denali Preferred Equipment Group Includes Standard Equipment
- Driver Alert Package Includes Lane Departure Warning
- Duramax 6.6L Turbo Diesel V8
- Duramax Plus Package Includes (Lml) Duramax 6.6L Turbo Diesel V8 Engine
- Electronic Engine Grade Braking And Tow/Haul Mode (Requires (Lml) Duramax 6.6L Turbo Diesel V8 Engine.)
- Electronically Controlled With Overdrive
- Emissions
- Engine
- Engine Block Heater (Included With (Lml) Duramax 6.6L Turbo Diesel V8 Engine.)
- Exhaust Brake (Included And Only Available With (Lml) Duramax 6.6L Turbo Diesel V8 Engine.)
- Federal Requirements
- Fifth Wheel And Gooseneck Trailer Includes Additional 7-Way Wiring Harness Is Located At The Rear Of The Pickup Box Attached To The Rear Frame Cross Member
- For Camper
- Forward Collision Alert
- Front (Will Be Forced On Orders With Ship-To States That Require Front License Plate) Note: (Vk3) Deletes Center Lower Bumper Filler Panel.
- Front Full-Feature Leather-Appointed Bucket With (Ka1) Heated Seat Cushions And Seat Backs. Includes 12-Way Power Driver And Front Passenger Seat Adjusters
- Gvwr
- Hands-Free Smartphone Integration
- Hill Descent Control (Included And Only Available With (Z71) Off-Road Suspension Package.)
- Including 2-Way Power Lumbar Control
- Jet Black
- Lamps
- Leather Seats
- License Plate Kit
- Lpo
- Lpo Or (Sb9) 4X4 Bedside Chrome Decal
- Lpo.)
- Lt265/60R20E All-Terrain
- Mirrors
- Navigation System
- Off-Road Includes Twin Tube Rancho Brand Shocks And (Jhd) Hill Descent Control (Requires All-Terrain Tires. Z71 Chrome Front Fender Emblem Not Included On Denali Models.)
- Onyx Black
- Outside Heated Power-Adjustable Vertical Camper
- Paint
- Pandora Internet Radio And Voice-Activated Technology For Radio And Phone (Std)
- Perforated Leather-Appointed Seat Trim
- Power (Not Available With (Vyu) Snow Plow Prep Package.)
- Power-Folding And Manual Extending
- Rear Axle
- Sd Card Slot
- Seats
- Smoked Amber Roof Marker (Not Available With (Yf5) California State Emissions Requirements.)
- Solid
- Sun/Moonroof
- Sunroof
- Suspension Package
- Tires
- Trailering Wiring Provisions
- Transmission
- Upper Glass
- Wheels
- Z71 (Dealer-Installed) (Requires (Z71) Off-Road Suspension Package. Not Available With (Sf8) Z71/4X4 Bedside Chrome Decal
Options
- 2015 INTERIM PROCESSING CODE (AVF)
- AUDIO SYSTEM, 8" DIAGONAL COLOR TOUCH SCREEN NAVIGATION WITH INTELLILINK, AM/FM/SIRIUSXM WITH USB PORTS auxiliary jack, SD card slot, Bluetooth streaming audio for music and most phones, hands-free smartphone integration, Pandora Internet radio and voice-activated technology for radio and phone (STD) (IO6)
- DENALI PREFERRED EQUIPMENT GROUP includes standard equipment (5SA)
- DRIVER ALERT PACKAGE includes Lane Departure Warning, Forward Collision Alert, and Safety Alert Seat (Included with (PCH) Duramax Plus Package.) (Y65)
- DURAMAX PLUS PACKAGE includes (LML) Duramax 6.6L Turbo Diesel V8 engine, (MW7) Allison 1000 6-speed automatic transmission and (Y65) Driver Alert Package *GROSS* (PCH)
- EMISSIONS, FEDERAL REQUIREMENTS (FE9)
- ENGINE BLOCK HEATER (Included with (LML) Duramax 6.6L Turbo Diesel V8 engine.) (K05)
- ENGINE, DURAMAX 6.6L TURBO DIESEL V8, B20-DIESEL COMPATIBLE (397 hp [296.0 kW] @ 3000 rpm, 765 lb-ft of torque [1032.8 N-m] @ 1600 rpm) Includes (K40) exhaust brake. (Included and only available with (PCH) Duramax Plus Package. Requires (GT4) 3.73 rear axle ratio and (K05) engine block heater.) (LML)
- EXHAUST BRAKE (Included and only available with (LML) Duramax 6.6L Turbo Diesel V8 engine.) (K40)
- GVWR, 10,000 LBS. (4536 KG) (Requires (LML) Duramax 6.6L Turbo Diesel V8 engine.) (C7A)
- HILL DESCENT CONTROL (Included and only available with (Z71) Off-Road Suspension Package.) (JHD)
- JET BLACK, PERFORATED LEATHER-APPOINTED SEAT TRIM (H2X)
- LAMPS, SMOKED AMBER ROOF MARKER (Not available with (YF5) California state emissions requirements.) (U01)
- LICENSE PLATE KIT, FRONT (will be forced on orders with ship-to states that require front license plate) Note: (VK3) deletes center lower bumper filler panel. (VK3)
- LPO, BEDSIDE DECAL, Z71 (dealer-installed) (Requires (Z71) Off-Road Suspension Package. Not available with (SF8) Z71/4x4 bedside chrome decal, LPO or (SB9) 4x4 bedside chrome decal, LPO.) (SB7)
- MIRRORS, OUTSIDE HEATED POWER-ADJUSTABLE VERTICAL CAMPER, UPPER GLASS, POWER-FOLDING AND MANUAL EXTENDING, CHROME. Includes integrated turn signal indicators consisting of 51 square inch flat mirror surface positioned over a 24.5 square inch convex mirror surface with a common head and lower convex spotter glass (convex glass is not heated and not power-adjustable) and addition of Auxiliary cargo lamp for backing up (helps to see trailer when backing up with a trailer) and amber auxiliary clearance lamp (DQS)
- ONYX BLACK (GBA)
- PAINT, SOLID (ZY1)
- REAR AXLE, 3.73 RATIO (Standard and only available with (LML) Duramax 6.6L Turbo Diesel V8 engine.) (GT4)
- SEATS, FRONT FULL-FEATURE LEATHER-APPOINTED BUCKET with (KA1) heated seat cushions and seat backs. Includes 12-way power driver and front passenger seat adjusters, including 2-way power lumbar control, 2-position driver memory, adjustable head restraints, (D07) floor console and storage pockets. (STD) (AN3)
- SUNROOF, POWER (Not available with (VYU) Snow Plow Prep Package.) (CF5)
- SUSPENSION PACKAGE, OFF-ROAD includes twin tube Rancho brand shocks and (JHD) Hill Descent Control (Requires all-terrain tires. Z71 chrome front fender emblem not included on Denali models.) (Z71)
- TIRES, LT265/60R20E ALL-TERRAIN, BLACKWALL (STD) (QFC)
- TRAILERING WIRING PROVISIONS, FOR CAMPER, FIFTH WHEEL AND GOOSENECK TRAILER includes additional 7-way wiring harness is located at the rear of the pickup box attached to the rear frame cross member (UY2)
- TRANSMISSION, ALLISON 1000 6-SPEED AUTOMATIC, ELECTRONICALLY CONTROLLED with overdrive, electronic engine grade braking and tow/haul mode (Requires (LML) Duramax 6.6L Turbo Diesel V8 engine.) (MW7)
- WHEELS, 20" (50.8 CM) CHROMED CAST ALUMINUM (STD) (RQA)
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Vehicle Description
- Duramax Plus Package
- Engine; Duramax 6.6L Turbo Diesel V8; B20-Diesel Compatible
- Transmission; Allison 1000 6-Speed Automatic; Electronically Controlled
- Sunroof; Power
- Sun/Moonroof
- Leather Seats
- Navigation System
- Driver Alert Package
- Suspension Package; Off-Road
- Mirrors; Outside Heated Power-Adjustable Vertical Camper; Upper Glass; Power-Folding And Manual Extending; Chrome.
- Lpo; Bedside Decal; Z71
- Rear Axle; 3.73 Ratio
- Engine Block Heater
- Lamps; Smoked Amber Roof Marker
- Trailering Wiring Provisions; For Camper; Fifth Wheel And Gooseneck Trailer
- Cooled Front Seat(S)
- 2015 Interim Processing Code
- Audio System; 8" Diagonal Color Touch Screen Navigation With Intellilink; AM/FM/SiriusXM With Usb Ports
- Denali Preferred Equipment Group
- Emissions; Federal Requirements
- Exhaust Brake
- Gvwr; 10;000 Lbs. (4536 Kg)
- Hill Descent Control
- Jet Black; Perforated Leather-Appointed Seat Trim
- License Plate Kit; Front
- Onyx Black
- Paint; Solid
- Seats; Front Full-Feature Leather-Appointed Bucket
- Tires; Lt265/60R20E All-Terrain; Blackwall
- Wheels; 20" (50.8 Cm) Chromed Cast Aluminum
This vehicle includes a Money-Back Guarantee* and passed our precise inspection process. Best of all the price you see is the price you pay. No haggling. No back and forth. No pressure. And this price is so good it is guaranteed. *Money-Back Guarantee is valid for 5 days or 250 miles, whichever comes first. Subject to certain terms and conditions. See store for details. Some restrictions apply.
This GMC includes: ENGINE, DURAMAX 6.6L TURBO DIESEL V8, B20-DIESEL COMPATIBLE Diesel Fuel 8 Cylinder Engine Turbocharged *Note - For third party subscriptions or services, please contact the dealer for more information.* Put performance, safety, beauty, sophistication and all the right amenities into a car, and here it is! Now you can own luxury without the luxury price tag! At home in the country and in the city, this 2015 4WD GMC Sierra 2500HD available WiFi Denali has been wonderfully refined to handle any occasion. Smooth steering, superior acceleration and a supple ride are just a few of its qualities. Intricately stitched leather and ergonomic design seats are among the details in which test drivers say that GMC Sierra 2500HD available WiFi Denali is in a league of its own More information about the 2015 GMC Sierra 2500HD available WiFi: The GMC Sierra HD derives a lot of value from being extremely customizable. In its most basic form, the Sierra HD is a simple work truck, albeit an extremely capable one. With a base price of around $32,000, it's affordable enough that owners will feel comfortable using the truck in the utilitarian way it was intended. However there is plenty available beyond that, should buyers want something more upscale. Denali editions start at around $48,000 and offer plenty of luxury for those who want a truck that can both work hard and coddle its occupants. Interesting features of this model are optional dual-rear wheel setup, Many configuration possibilities, available luxury options, and high towing capacity
Vehicle At A Glance
- Rear Parking Aid
- Keyless Entry
- Satellite Radio
- Sun/Moonroof
- Bluetooth Connection
- Heated Front Seat(s)
- Smart Device Integration
- Cooled Front Seat(s)
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Accessories
Shop our entire portfolio of GMC Accessories and make your vehicle one of a kind.
Whether you’re looking for Premium All-Weather Floor Liners and Floor Mats to help protect your interior, 22” Wheels and Black GMC Emblems for personal style or a set of Cross Rails to expand your cargo options, we’ve got you covered.
Choose from the only accessories Designed, Engineered, Tested and Backed by GMC as well as Associated Accessories from our partners at Thule, Kicker and others to personalize and enhance your vehicle.
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Dealer sets actual price. Accessories and color may vary. Quoted price subject to change without notice to correct errors or omissions. New vehicle pricing may already include applicable manufacturer incentives which may expire at any time and are subject to incentive qualification criteria and requirements, and which may be contingent upon manufacturer finance company approval. Manufacturer incentive data and vehicle features is provided by third parties and believed to be accurate as of the time of publication. Please contact the store by email or phone for details and availability of incentives. Sales tax or other taxes, tag, license, title, registration fees, government fees and dealer processing fee of $699 are not included in quoted price.
Certain data and other content displayed herein is copyrighted by AutoNation, Inc. and / or third parties. (In addition, providers of data and other materials to AutoNation, Inc. or such third parties may have a copyright interest in and to such data to the extent that such data and other materials are subject to copyright protection under applicable United States laws.) Such data may not be reproduced or distributed in whole or in part by any printed, electronic or other means without explicit written permission from AutoNation, Inc. All information is gathered from sources that are believed to be reliable, but no assurance can be given that this information is complete and neither AutoNation, Inc. nor its suppliers assume any responsibility for errors or omissions or warrant the accuracy of this information.
Displayed MPG is based on applicable EPA mileage ratings. Use for comparison purposes only. Your actual mileage will vary, depending on how you drive and maintain your vehicle, driving conditions, battery pack age/condition (hybrid models only) and other factors. All Vehicles MPG estimates on this website are EPA estimates; your actual mileage may vary. For used vehicles, MPG estimates are EPA estimates for the vehicle when it was new. The EPA periodically modifies its MPG calculation methodology; all MPG estimates are based on the methodology in effect when the vehicles were new (please see the Fuel Economy portion of the EPAs website for details, including a MPG recalculation tool). The features and options listed are for the new 2015 GMC Sierra 2500 HD and may not apply to this specific vehicle.
Certain data and other content displayed herein is copyrighted by AutoNation, Inc. and / or third parties. (In addition, providers of data and other materials to AutoNation, Inc. or such third parties may have a copyright interest in and to such data to the extent that such data and other materials are subject to copyright protection under applicable United States laws.) Such data may not be reproduced or distributed in whole or in part by any printed, electronic or other means without explicit written permission from AutoNation, Inc. All information is gathered from sources that are believed to be reliable, but no assurance can be given that this information is complete and neither AutoNation, Inc. nor its suppliers assume any responsibility for errors or omissions or warrant the accuracy of this information.
Displayed MPG is based on applicable EPA mileage ratings. Use for comparison purposes only. Your actual mileage will vary, depending on how you drive and maintain your vehicle, driving conditions, battery pack age/condition (hybrid models only) and other factors. All Vehicles MPG estimates on this website are EPA estimates; your actual mileage may vary. For used vehicles, MPG estimates are EPA estimates for the vehicle when it was new. The EPA periodically modifies its MPG calculation methodology; all MPG estimates are based on the methodology in effect when the vehicles were new (please see the Fuel Economy portion of the EPAs website for details, including a MPG recalculation tool). The features and options listed are for the new 2015 GMC Sierra 2500 HD and may not apply to this specific vehicle.