2018 GMC Sierra 3500 HD Bodies and Fender Parts

Keep Your 2018 GMC Sierra 3500 HD in Top Shape with Quality Bodies and Fender Parts

Whether you’re repairing or upgrading your Bodies and Fender Part, using high-quality parts is key to keeping your 2018 GMC Sierra 3500 HD looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Fender Liner Retainers, Splash Guard (Mud Flap), and Splash Shield Retainers. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Bodies and Fender Parts from Trusted Brands

Looking for a reliable Bodies and Fender Part? We’ve got you covered with options from brands you know and trust like Dorman, TrailFX, and WeatherTech. For example, Dorman Bodies and Fender Parts start at just $4.99 with an average 4.2 star rating. TrailFX and WeatherTech offer similar pricing and quality, backed by strong customer feedback. With over 76 reviews and a solid 5 star average, you can shop with confidence knowing other GMC Sierra 3500 HD owners approve.

Competitive Prices and Extensive Inventory

The average price for a 2018 GMC Sierra 3500 HD Bodies and Fender Part at Advance Auto Parts is around $391.77, with a range that starts at $0.99 and goes up to $1,799.99. With 159 options in stock from 11 trusted brands, finding the right fit is easy. Popular picks like GM Trim Panel Clip, GM Bumper Retainer, and GM Drive Type Rivet start at just $4.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Bodies and Fender Part, don’t forget to check out other key components like Truck Beds and Vehicle Windows. At Advance Auto Parts, we’re here to help you keep your 2018 GMC Sierra 3500 HD in peak condition, inside and out.

Essential 2018 GMC Sierra 3500 HD Bodies and Fender Parts

KAI – Fender Brace (Part No.GM1245105)

Fender Brace

from

$49.99
New Standard Replacement Passenger Side Fender Brace, Rear Upper Bracket

Product Features:
  • Rear Upper Bracket, Made Of Steel
  • Meets All Federal Motor Safety Standards
  • No Drilling Needed For Installation
  • No Modifications Needed For Installation
  • Direct Fit Replacement For Your Vehicle
  • Same Form Fit And Function As OE
  • Check Out The Large Selection Of Parts Available For Your Vehicle
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ARIES – 4 Inch Oval Side Bars (Part No.S224046)

4 Inch Oval Side Bars

from

$209.99
When you start and end your day turning the ignition of your truck, unreliable footing just is not an option. You need a step that can bear weight with ease, provide comfortable footing and look good doing it. ARIES 4″ oval side bars are sleek, strong and custom-fitted to be a highly functional extension of your truck. ARIES 4″ oval side bars are made with strong 4″ elliptical tubing and are available in two different finish options to allow you full customization. This set of side bars is constructed from high-strength carbon steel for a solid step, and they feature a dual-layer E-coat and semi-gloss black powder coat finish for excellent protection against scratching, chipping and peeling. Something that sets the ARIES 4″ oval side bar apart from all others is its blended end caps and OE-style bends. Rather than capping our side bars with a plastic cap, we offer a blended end cap for a smooth, finished appearance. We also equip the ends with a special 20-degree bend and original equipment styling to perfectly contour to your vehicle. ARIES 4″ oval side bars are fitted with raised step pads to provide a wide stepping surface. The polypropylene construction will not crack over time, and because it has a textured grip, the surface is highly resistant to slips and skids, even when wet. To add an extra element of class to our oval sides, we also fit each one with a stainless steel insignia bearing the ARIES name. Installation of ARIES 4″ oval side bars is quick and easy with custom-fitted mounting brackets and no drilling necessary (NOTE: This set of side bars is compatible with DEF tank models). These nerf bars fit select model years of the Chevrolet Silverado and GMC Sierra 1500, 1500 Classic, 1500 LD, 2500 HD, 2500 HD Classic, 3500 HD and 3500 Classic (see application info to verify fitment).

Product Features:
  • 20-degree bends to contour to the body of the vehicle
  • Seamless, welded end caps for a superior, finished look
  • Raised, custom, non-skid step pads for safe, comfortable entry and exit
  • High-strength carbon steel construction
  • Durable E-coat and semi-gloss black powder coat finish for solid rust resistance
  • Brushed stainless steel ARIES insignia on each step
  • Elliptical, 4″ wide, heavy-wall tube design
  • No-drill, vehicle-specific application for a custom fit
  • Heavy-duty steel mounting brackets (compatible with DEF tank models)
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Dorman – Drive Type Rivet-GM-Hole Size-8.25mm-Diameter 20mm (Part No.963-210)

Drive Type Rivet-GM-Hole Size-8.25mm-Diameter 20mm

from

$9.49
Constructed of quality materials, this multi-purpose retainer provides the same function and versatility as the original equipment retainer ensuring long service life.

Product Features:
  • Ideal replacement – this retainer matches the fit and function of the original equipment retainer for this vehicle application
  • Quality material – this retainer is made of durable material for long-lasting service
  • Versatile design – this retainer is suitable for a variety of automotive uses
  • Excellent value – this part offers original equipment quality at a competitive cost
See More

Dorman – Clip Nut – Wide Panel-No. 8 X 3/8 In, Panel Range .025 In – .125 In (Part No.45406)

Clip Nut - Wide Panel-No. 8 X 3/8 In, Panel Range .025 In - .125 In

from

$1.99
Dorman offers a comprehensive line of Clip / Spring Nuts for a range of automotive applications. They are available for use with a large variety of screw sizes, throat depths, and panel ranges.

Product Features:
  • Constructed of high-quality materials for long-lasting durability
  • Many different styles are available, including threaded and wide panel
  • Packaged in a variety of piece counts for use with both small and large projects
  • Also suitable for a broad range of industrial and commercial uses
See More

Dorman – Truck Bed Mounting Hardware (Part No.926-846)

Truck Bed Mounting Hardware

from

$38.99
Truck bed loose from rusted or missing hardware? This truck bed mounting hardware matches the fit of the original equipment mounting hardware to securely remount the truck bed to the frame.

Product Features:
  • Ideal replacement – this bed mounting hardware kit contains all the necessary components to completely remount the truck bed to the frame
  • Durable construction – this truck bed hardware is finished with a corrosion-resistant coating for a long service life
  • Cost-effective solution – offers original equipment quality at competitive price
  • Quality tested – this part has undergone try-on, corrosion and material testing to ensure a quality fit and long service life
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Dorman – Push-Pull Rivet-Rocker Panel – 9 mm Hole, 22 mm Stem, 15 mm Head (Part No.963-093D)

Push-Pull Rivet-Rocker Panel - 9 mm Hole, 22 mm Stem, 15 mm Head

from

$4.99
Constructed of quality materials, this multi-purpose retainer provides the same function and versatility as the original equipment retainer ensuring long service life.

Product Features:
  • Ideal replacement – this retainer matches the fit and function of the original equipment retainer for this vehicle application
  • Quality material – this retainer is made of durable material for long-lasting service
  • Versatile design – this retainer is suitable for a variety of automotive uses
  • Excellent value – this part offers original equipment quality at a competitive cost
See More

Westin – Running Board Mount Kit (Part No.27-1735)

Running Board Mount Kit

from

$172.99
Product Features:
  • Required Part For Running Boards
  • Vehicle Specific Mount Kit Insures Proper Fit
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KAI – Rocker Panel (Part No.RRP3143)

Rocker Panel

from

$62.99
New Standard Replacement Driver Side Rear Inner Rocker Panel, 58.5 X 1 X 9, Crew Cab Only

Product Features:
  • 58.5 X 1 X 9, Crew Cab Only, Made Of Steel
  • Meets All Federal Motor Safety Standards
  • No Drilling Needed For Installation
  • No Modifications Needed For Installation
  • Direct Fit Replacement For Your Vehicle
  • Same Form Fit And Function As OE
  • Check Out The Large Selection Of Parts Available For Your Vehicle
See More

Westin – Premier Oval Nerf Step Bar Mount Kit (Part No.22-1075)

Premier Oval Nerf Step Bar Mount Kit

from

$174.99
Required part for oval tubes. Vehicle specific mount kit insures proper fit. 5 year warranty.

Product Features:
  • Required Part For Oval Tubes
  • Vehicle Specific Mount Kit Insures Proper Fit
  • 5 Year Warranty
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Westin – Premier Oval Nerf Step Bar Mount Kit (Part No.22-2015)

Premier Oval Nerf Step Bar Mount Kit

from

$169.99
Required part for oval tubes. Vehicle specific mount kit insures proper fit. 5 year warranty.

Product Features:
  • Required Part For Oval Tubes
  • Vehicle Specific Mount Kit Insures Proper Fit
  • 5 Year Warranty
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Dorman – Help – Spare Tire Hoist Cover (Part No.47830)

Spare Tire Hoist Cover

from

$44.99
Damaged or missing spare tire hoist cover? This direct replacement spare tire hoist lock cylinder tube matches the original equipment part to keep debris from getting into the guide tube.

Product Features:
  • Direct replacement – this spare tire hoist lock cylinder tube matches the fit and function of the original equipment part
  • Easy to install – no special tools required to install this spare tire hoist tube
  • Durable materials – manufactured from sturdy materials for a reliable service life
  • Quality fit – this spare tire hoist lock cylinder tube has been dimensionally tested to ensure accurate fit and function
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Dorman – Rivet-Push In-Hole Diameter .500 In-Head Diameter 1 In-Length .900 In (Part No.799-105)

Rivet-Push In-Hole Diameter .500 In-Head Diameter 1 In-Length .900 In

from

$5.99
Constructed of quality materials, this multi-purpose retainer provides the same function and versatility as the original equipment retainer ensuring long service life.

Product Features:
  • Ideal replacement – this retainer matches the fit and function of the original equipment retainer for this vehicle application
  • Quality material – this retainer is made of durable material for long-lasting service
  • Versatile design – this retainer is suitable for a variety of automotive uses
  • Excellent value – this part offers original equipment quality at a competitive cost
See More

Dorman – Windshield Garnish Clip – Exterior (Part No.963-211)

Windshield Garnish Clip - Exterior

from

$5.29
Dorman offers a comprehensive line of Clip / Spring Nuts for a range of automotive applications. They are available for use with a large variety of screw sizes, throat depths, and panel ranges.

Product Features:
  • Constructed of high-quality materials for long-lasting durability
  • Many different styles are available, including threaded and wide panel
  • Packaged in a variety of piece counts for use with both small and large projects
  • Also suitable for a broad range of industrial and commercial uses
See More

Lund – Ex-Extrawide Style 2Pc Smooth (Part No.EX109SA)

Ex-Extrawide Style 2Pc Smooth

from

$268.99
LUND’s EX-ExtraWide Style flare series offers a blend between factory style looks and off-road flare. Designed for larger tires and wheels, this wide style is an excellent choice for all trucks with oversized wheels and tires. Even if you haven’t added giant tires that stick out from the stock wheel arches, you still might like the burly look of the wider flares. Depending on the model application, the extra 4-6 inches of body coverage is also a quick fix for hiding rust and other fender blemishes, reducing the need for expensive paint and bodywork. The extra width of coverage for the tires ensures optimum vehicle body protection from rocks and road debris, keeping paint and body damage to a minimum. This durable extra-wide fender flare, available in four-piece sets, is designed to not only add a rugged, off-road look, but also protect the sides of your vehicle from road debris and harsh outdoor elements. LUND’s EX-ExtraWide Style flares are made with Tri-Flex ABS thermoplastic material to allow for maximum strength and flexibility – built to last, .Straight from the die, the flare has a satiny (standard) or textured finish that looks great as is, but can also be easily prepped and painted to match your vehicle. Maintenance is easy! You can use any detergent you use to wash your vehicle to clean the flares as well.

Product Features:
  • Provides Extra Coverage On Larger Tire Packages
  • Extra Fender Coverage Protects From Debris
  • Made From Durable OEM-Style ABS Plastic
  • Can Be Prepped, Primed And Painted
  • Installs With Out Drilling
  • Covers Rust And Fender Blemishes
  • Mounting Hardware Included
  • Designed For Perfect Fitment
  • UV Resistant From Color Fading
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Lund – Sx-Sport Style 4Pc Textured (Part No.SX110T)

Sx-Sport Style 4Pc Textured

from

$398.99
LUND’s SX-Sport Style fender flares seamlessly add OE style to your Chevy Silverado, Toyota Tundra, GMC Sierra, Dodge Ram or Ford truck. This fender flare style is perfect for those looking for clean line accessories that blend well with their vehicle. The flares’ low profile complements the original design and contours of the wheel well while adding a distinctive style.This durable fender flare, available in two and four-piece sets, is designed to not only add style, but also protect the brilliant coat of paint and the sides of your vehicle from road debris and harsh outdoor elements and weather conditions. LUND SX-Sport Style fender flares are made with Tri-Flex ABS thermoplastic material to allow for maximum strength and flexibility-UV-resistant and built to last, . Straight from the die, the flare has a smooth (standard) or textured finish that looks great as is, but can also be easily prepped and painted to match your vehicle. Maintenance is easy! You can use any detergent to wash your vehicle to clean the flares as well.

Product Features:
  • Bring A Neat And Seamless Style To Your Vehicle
  • Perfect Clean Line Accessory
  • Blends In Well And Looks Like It Came From The Factory
  • Protects Your Vehicle From Road Debris
  • Made From Durable OEM-Style ABS Plastic
  • Can Be Prepped, Primed And Painted
  • Installs Quickly With Included Fasteners
  • No Modification Is Necessary
  • Covers Rust And Fender Blemishes
  • Designed For Perfect Fitment
  • UV Resistant From Color Fading
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Dorman – Spare Tire Hoist Assembly (Part No.924-549)

Spare Tire Hoist Assembly

from

$90.99
Spare tire hoist rusted out and corroded? This replacement hoist is specifically engineered to match the original design on specific vehicles, and it’s specially coated to resist future rust and corrosion.

Product Features:
  • Direct replacement – this spare tire hoist is precisely engineered to replace the hoist that comes stock on specific vehicle years, makes and models
  • Easy installation – simply remove the spare tire, unbolt the original part, and bolt on this replacement
  • Functionality ensured – hoist appearance may vary slightly from original part but functions the same
  • Corrosion resistant – specially coated to prevent future rust and corrosion
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Dorman – Spare Tire Hoist Assembly (Part No.924-502)

Spare Tire Hoist Assembly

from

$142.99
Spare tire hoist rusted out and corroded? This replacement hoist is specifically engineered to match the original design on specific vehicles, and it’s specially coated to resist future rust and corrosion.

Product Features:
  • Direct replacement – this spare tire hoist is precisely engineered to replace the hoist that comes stock on specific vehicle years, makes and models
  • Easy installation – simply remove the spare tire, unbolt the original part, and bolt on this replacement
  • Functionality ensured – hoist appearance may vary slightly from original part but functions the same
  • Corrosion resistant – specially coated to prevent future rust and corrosion
See More

COAST TO COAST – Multi-Fit, Chrome Abs, 4 Piece, Two 38" L X 1/4" Thick X 1-1/8" H Pieces (Part No.CCISM608)

Multi-Fit, Chrome Abs, 4 Piece, Two 38" L X 1/4" Thick X 1-1/8" H Pieces

from

$169.99
Coat to Coast International body side molding is a stylish accessory that compliments any vehicle. Durable ABS plastic is chrome plated for lasting shine. Side moldings install effortlessly with automotive grade 3M tape. All Coast to Coast International products feature a limited lifetime warranty.

Product Features:
  • Constructed From High-Quality, Durable, Automotive Grade ABS
  • Two Layers Of Clear Coat Enhance And UV Protect The Finish
  • Quickly And Affordably Upgrades The Trim Level Appearance Of A Vehicle
  • Installs In Minutes Without Tools Using Pre-Applied Automotive Grade 3M Tape
  • Mount with 3M Tape
See More

COAST TO COAST – Direct-Fit, Chrome Plated, 4 Piece (Part No.CCISM607)

Direct-Fit, Chrome Plated, 4 Piece

from

$169.99
Product Care: Regular vehicle cleaning of dirt, grime or salt twice a month, year round. Appling a high quality wax to help protect and maintain the finish of the product is recommended. Use ONLY Non Abrasive automotive wax. Use of any soap, polish or wax that contains an abrasive is detrimental and can scratch the finish leading to corrosion. Do not use harsh cleaners or chemicals that could damage the finish. Failure to keep your product clean may result in pitting and or peeling.

Product Features:
  • Chrome Plated For A Long Lasting Shine
  • Designed To Fit Multiple Vehicles
  • Easy Installation
  • Mount with 3M Tape
See More

Dee Zee – Multi-Fit, 11" X 19", Set Of 2, Rectangle With Radius Notch, Black, Aluminum (Part No.DZ1808TB)

Multi-Fit, 11" X 19", Set Of 2, Rectangle With Radius Notch, Black, Aluminum

from

$50.99
The oft overlooked mudflap. One of those protective accessories you Do not realize you need until it is too late. Rocks, sticks, and other road debris can wreak havoc on your cars finish and underside. Dee Zee Mud Flaps protect your vehicle and trailer from damage and add a classic stylistic element to your vehicle.

Product Features:
  • Classic Styling Of Brite-Tread Aluminum
  • Front Or Rear Wheel Protection
  • Radius Notch Contours To The Fender Well
  • Protected By A BriteGard Powder Coat Finish
See More

WeatherTech – Direct-Fit, Pair, Contoured, Black, Thermoplastic, Quickturn ┐ Fastening System (Part No.120025)

Direct-Fit, Pair, Contoured, Black, Thermoplastic, Quickturn ┐ Fastening System

from

$139.99
The WeatherTech MudFlap Laser Measured for a Perfect Fit set literally mounts in minutes without the need for wheel or tire removal, and most importantly without the need for drilling into the vehicles fragile painted metal surface. Contoured specifically for each application and molded from a proprietary thermoplastic resin, the WeatherTech MudFlap will offer undeniable vehicle protection.

Product Features:
  • Protects Your Vehicle s Fenders And Exterior From Rocks, Mud, Road Grime And Other Debris Picked Up By Vehicle s Wheels
  • Featuring The Patented QuickTurn Hardened Stainless Steel Fastening System
  • Provide Protection For Your Vehicle Most Vulnerable Rust Area
  • Protecting The Fender And Rocker Panel From Stone Chips, Slush, Dirt And Debris
  • Molded From A Proprietary Thermoplastic Resin
  • No Drilling Required And Installs In Minutes
See More

Dorman – Rivet-Push In-Hole Diameter .500 In-Head Diameter 1 In-Length .900 In (sold by each) (Part No.700-575)

Rivet-Push In-Hole Diameter .500 In-Head Diameter 1 In-Length .900 In (sold by each)

from

$2.99
Constructed of quality materials, this multi-purpose retainer provides the same function and versatility as the original equipment retainer ensuring long service life.

Product Features:
  • Ideal replacement – this retainer matches the fit and function of the original equipment retainer for this vehicle application
  • Quality material – this retainer is made of durable material for long-lasting service
  • Versatile design – this retainer is suitable for a variety of automotive uses
  • Excellent value – this part offers original equipment quality at a competitive cost
See More

Dorman – GM Bumper Retainer (Part No.961-070D)

GM Bumper Retainer

from

$4.99
Constructed of quality materials, this multi-purpose retainer provides the same function and versatility as the original equipment retainer ensuring long service life.

Product Features:
  • Ideal replacement – this retainer matches the fit and function of the original equipment retainer for this vehicle application
  • Quality material – this retainer is made of durable material for long-lasting service
  • Versatile design – this retainer is suitable for a variety of automotive uses
  • Excellent value – this part offers original equipment quality at a competitive cost
See More

Dorman – Panel Trim Retainer, Interior, GM/Ford/Chrysler (Sold by each) (Part No.700-365)

Panel Trim Retainer, Interior, GM/Ford/Chrysler (Sold by each)

from

$0.99
Product Features:
  • Ideal replacement – this retainer matches the fit and function of the original equipment retainer for this vehicle application.
  • Quality material – this retainer is made of durable material for long-lasting service.
  • Versatile design – this retainer is suitable for a variety of automotive uses
  • Excellent value – this part offers original equipment quality at a competitive cost
See More

KAI – Step Bumper Face Bar (Part No.GM1102563)

Step Bumper Face Bar

from

$1140.00
New Standard Replacement Rear Step Bumper Face Bar, Paint To Match, With Corner Step, With Park Assist Sensor Holes

Product Features:
  • Paint To Match, With Corner Step, With Park Assist Sensor Holes, Made Of Steel
  • Meets All Federal Motor Safety Standards
  • No Drilling Needed For Installation
  • No Modifications Needed For Installation
  • Direct Fit Replacement For Your Vehicle
  • Same Form Fit And Function As OE
  • Check Out The Large Selection Of Parts Available For Your Vehicle
See More

KAI – Step Bumper Face Bar (Part No.GM1102557)

Step Bumper Face Bar

from

$929.99
New Standard Replacement Rear Step Bumper Bar, Chrome, With Corner Step, With Park Assist Sensor Holes

Product Features:
  • Chrome, With Corner Step, With Park Assist Sensor Holes, Made Of Steel
  • Meets All Federal Motor Safety Standards
  • No Drilling Needed For Installation
  • No Modifications Needed For Installation
  • Direct Fit Replacement For Your Vehicle
  • Same Form Fit And Function As OE
  • Check Out The Large Selection Of Parts Available For Your Vehicle
See More

KAI – Step Bumper Face Bar (Part No.GM1102558)

Step Bumper Face Bar

from

$929.99
New Standard Replacement Rear Step Bumper Bar, Chrome, With Corner Step, Without Park Assist Sensor Holes

Product Features:
  • Chrome, With Corner Step, Without Park Assist Sensor Holes, Made Of Steel
  • Meets All Federal Motor Safety Standards
  • No Drilling Needed For Installation
  • No Modifications Needed For Installation
  • Direct Fit Replacement For Your Vehicle
  • Same Form Fit And Function As OE
  • Check Out The Large Selection Of Parts Available For Your Vehicle
See More

Most Popular Fender Liner Retainers for 2018 GMC Sierra 3500 HDs

Enhance your 2018 GMC Sierra 3500 HD with one of the 2 Fender Liner Retainers we have in stock, starting at just $2.99.

Dorman – GM Bumper Retainer (Part No.961-070D)

GM Bumper Retainer

from

$4.99
Constructed of quality materials, this multi-purpose retainer provides the same function and versatility as the original equipment retainer ensuring long service life.

Product Features:
  • Ideal replacement – this retainer matches the fit and function of the original equipment retainer for this vehicle application
  • Quality material – this retainer is made of durable material for long-lasting service
  • Versatile design – this retainer is suitable for a variety of automotive uses
  • Excellent value – this part offers original equipment quality at a competitive cost
See More

Dorman – Rivet-Push In-Hole Diameter .500 In-Head Diameter 1 In-Length .900 In (sold by each) (Part No.700-575)

Rivet-Push In-Hole Diameter .500 In-Head Diameter 1 In-Length .900 In (sold by each)

from

$2.99
Constructed of quality materials, this multi-purpose retainer provides the same function and versatility as the original equipment retainer ensuring long service life.

Product Features:
  • Ideal replacement – this retainer matches the fit and function of the original equipment retainer for this vehicle application
  • Quality material – this retainer is made of durable material for long-lasting service
  • Versatile design – this retainer is suitable for a variety of automotive uses
  • Excellent value – this part offers original equipment quality at a competitive cost
See More

Best-Selling 2018 GMC Sierra 3500 HD Splash Guard (Mud Flap)

Upgrade your Sierra 3500 HD with one of our 3 best-selling Splash Guard (Mud Flap), earning an average 5 stars rating across 1 reviews.

WeatherTech – Direct-Fit, Pair, Contoured, Black, Thermoplastic, Quickturn ┐ Fastening System (Part No.120036)

Direct-Fit, Pair, Contoured, Black, Thermoplastic, Quickturn ┐ Fastening System

from

$91.99
The WeatherTech MudFlap – Laser Measured for a Perfect Fit set literally mounts-in-minutes (in most applications) without the need for wheel/tire removal, and most importantly – without the need for drilling into the vehicle fragile painted metal surface Contoured specifically for each application and molded from a proprietary thermoplastic resin, the WeatherTech MudFlap will offer undeniable vehicle protection.

Product Features:
  • Protects Your Vehicle s Fenders And Exterior From Rocks, Mud, Road Grime And Other Debris Picked Up By Vehicle s Wheels
  • Featuring The Patented QuickTurn Hardened Stainless Steel Fastening System
  • Provide Protection For Your Vehicles Most Vulnerable Rust Area
  • Protecting The Fender And Rocker Panel From Stone Chips, Slush, Dirt And Debris
  • Molded From A Proprietary Thermoplastic Resin
  • No Drilling Required And Installs In Minutes
See More

Dee Zee – Multi-Fit, 11" X 19", Set Of 2, Rectangle With Radius Notch, Black, Aluminum (Part No.DZ1808TB)

Multi-Fit, 11" X 19", Set Of 2, Rectangle With Radius Notch, Black, Aluminum

from

$50.99
The oft overlooked mudflap. One of those protective accessories you Do not realize you need until it is too late. Rocks, sticks, and other road debris can wreak havoc on your cars finish and underside. Dee Zee Mud Flaps protect your vehicle and trailer from damage and add a classic stylistic element to your vehicle.

Product Features:
  • Classic Styling Of Brite-Tread Aluminum
  • Front Or Rear Wheel Protection
  • Radius Notch Contours To The Fender Well
  • Protected By A BriteGard Powder Coat Finish
See More

WeatherTech – Direct-Fit, Pair, Contoured, Black, Thermoplastic, Quickturn ┐ Fastening System (Part No.120076)

Direct-Fit, Pair, Contoured, Black, Thermoplastic, Quickturn ┐ Fastening System

from

$139.99
The WeatherTech MudFlap Laser Measured for a Perfect Fit set literally mounts in minutes without the need for wheel Or tire removal, and most importantly without the need for drilling into the vehicles fragile painted metal surface. Contoured specifically for each application and molded from a proprietary thermoplastic resin, the WeatherTech MudFlap will offer undeniable vehicle protection.

Product Features:
  • Feature The Patented Quick Turn Hardened Stainless Steel Fastening System
  • Contoured Specifically For Each Application And Molded From A Proprietary Thermoplastic Resin
  • Mud Flaps Provide Protection For Your Vehicle Most Vulnerable Areas: Protecting The Fender And Rocker Panel From Stone Chips, Slush, Dirt And Debris
  • Laser Measured For A Perfect Fit Set Literally Mounts In Minutes
See More

Top-Quality Splash Shield Retainers for 2018 GMC Sierra 3500 HDs

Choose a high-quality OEM or aftermarket Splash Shield Retainer for GMC Sierra 3500 HDs and enjoy top-notch performance from $4.99.

Dorman – Ford, GM Fender Retainer (Part No.961-366D)

Ford, GM Fender Retainer

from

$4.99
Constructed of quality materials, this multi-purpose retainer provides the same function and versatility as the original equipment retainer ensuring long service life.

Product Features:
  • Ideal replacement – this retainer matches the fit and function of the original equipment retainer for this vehicle application
  • Quality material – this retainer is made of durable material for long-lasting service
  • Versatile design – this retainer is suitable for a variety of automotive uses
  • Excellent value – this part offers original equipment quality at a competitive cost
See More

Top Picks for 2018 GMC Sierra 3500 HD Fender Splash Shields

Invest in one of our 4 durable Fender Splash Shields for your 2018 GMC, knowing you’re getting trusted brands and expert craftsmanship.

Dorman – Chrysler, Ford, GM Panel Retainer, Pack of 3 (Part No.963-058D)

Chrysler, Ford, GM Panel Retainer, Pack of 3

from

$4.99
Constructed of quality materials, this multi-purpose retainer provides the same function and versatility as the original equipment retainer ensuring long service life.

Product Features:
  • Ideal replacement – this retainer matches the fit and function of the original equipment retainer for this vehicle application
  • Quality material – this retainer is made of durable material for long-lasting service
  • Versatile design – this retainer is suitable for a variety of automotive uses
  • Excellent value – this part offers original equipment quality at a competitive cost
  • Pack of 3
See More

Dorman – GM Trim Panel Clip (Part No.963-211D)

GM Trim Panel Clip

from

$4.99
Dorman offers a comprehensive line of Clip / Spring Nuts for a range of automotive applications. They are available for use with a large variety of screw sizes, throat depths, and panel ranges.

Product Features:
  • Constructed of high-quality materials for long-lasting durability
  • Many different styles are available, including threaded and wide panel
  • Packaged in a variety of piece counts for use with both small and large projects
  • Also suitable for a broad range of industrial and commercial uses
See More

Dorman – Push-Pull Rivet-Rocker Panel – 9 mm Hole, 22 mm Stem, 15 mm Head (Part No.963-093D)

Push-Pull Rivet-Rocker Panel - 9 mm Hole, 22 mm Stem, 15 mm Head

from

$4.99
Constructed of quality materials, this multi-purpose retainer provides the same function and versatility as the original equipment retainer ensuring long service life.

Product Features:
  • Ideal replacement – this retainer matches the fit and function of the original equipment retainer for this vehicle application
  • Quality material – this retainer is made of durable material for long-lasting service
  • Versatile design – this retainer is suitable for a variety of automotive uses
  • Excellent value – this part offers original equipment quality at a competitive cost
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Dorman – Windsheild Garnish Clip-exterior-GM (sold by each) (Part No.700-052)

Windsheild Garnish Clip-exterior-GM (sold by each)

from

$1.29
Dorman offers a comprehensive line of Clip / Spring Nuts for a range of automotive applications. They are available for use with a large variety of screw sizes, throat depths, and panel ranges.

Product Features:
  • Constructed of high-quality materials for long-lasting durability
  • Many different styles are available, including threaded and wide panel
  • Packaged in a variety of piece counts for use with both small and large projects
  • Also suitable for a broad range of industrial and commercial uses
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Top-Rated Body Mounts for 2018 GMC Sierra 3500 HDs

Make a smart move for your 2018 GMC Sierra 3500 HD with products all priced from $38.99 to $75.99.

Dorman – Radiator Support Kit (Part No.924-130)

Radiator Support Kit

from

$75.99
Don’t let worn body mounts ruin your vehicle’s comfortable ride. This body mount includes all the hardware required for an easy replacement. Made with quality materials for a long service life, this vehicle-specific design is a perfect fit.

Product Features:
  • Direct replacement – this body mount fits and functions like the original equipment mount
  • Quality construction – manufactured from premium materials for a long service life
  • Excellent value – original equipment quality at a lower price
  • Quality tested – has undergone testing to ensure proper fit and performance
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Dorman – Truck Bed Mounting Hardware (Part No.926-846)

Truck Bed Mounting Hardware

from

$38.99
Truck bed loose from rusted or missing hardware? This truck bed mounting hardware matches the fit of the original equipment mounting hardware to securely remount the truck bed to the frame.

Product Features:
  • Ideal replacement – this bed mounting hardware kit contains all the necessary components to completely remount the truck bed to the frame
  • Durable construction – this truck bed hardware is finished with a corrosion-resistant coating for a long service life
  • Cost-effective solution – offers original equipment quality at competitive price
  • Quality tested – this part has undergone try-on, corrosion and material testing to ensure a quality fit and long service life
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Top-Rated Bodies and Fender Part Brands For Your 2018 GMC Sierra 3500 HD

When it comes to finding the perfect Bodies and Fender Part for your 2018 GMC Sierra 3500 HD, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 11 trusted brands. We carry the most popular Bodies and Fender Part brands including TrailFX, Dorman, and WeatherTech, and more, all known for their exceptional customer ratings (average brand rating of 5.0 stars) and competitive prices, as low as $4.99. Purchasing a Bodies and Fender Part from us here at Advance Auto Parts is a smart move for both you and your 2018 GMC Sierra 3500 HD, providing peace of mind with parts that meet or exceed OEM standards.

Popular TrailFX 2018 GMC Sierra 3500 HD Bodies and Fender Parts

If you’re looking for a top-quality Bodies and Fender Part for your 2018 GMC Sierra 3500 HD, Advance Auto Parts has exactly what you need with our selection of TrailFX Bodies and Fender Parts. We have 1 TrailFX Bodies and Fender Parts in stock for this fitment, all known for their durability and precision fit. With prices starting at just $258.99, you’ll find the perfect Bodies and Fender Part for your needs and budget. TrailFX Bodies and Fender Parts for the 2018 GMC Sierra 3500 HD come highly rated, with over 1 customer reviews and an impressive average rating of 5.0 stars. Choosing a TrailFX Bodies and Fender Part from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
With Step Pads, 3"Round Bent, Powder Coated, Black, Steel, Frame Body Mount Bolt
from $258.99
(1)
With Step Pads, 3"Round Bent, Powder Coated, Black, Steel, Frame Body Mount Bolt
“Simple and classic design. Great price range and very fast shipping. Very simple self explanatory install took me maybe 30 minutes and seem very sturd”

Top-Quality Dorman 2018 GMC Sierra 3500 HD Bodies and Fender Parts

For those in search of a high-quality Bodies and Fender Part for their 2018 GMC Sierra 3500 HD, Advance Auto Parts offers a great selection of Dorman Bodies and Fender Parts. With 3 Dorman Bodies and Fender Parts in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Bodies and Fender Parts start at just $4.99, with an average price of $28.99, giving you a range of options to suit your budget. Backed by over 4 customer ratings and an average rating of 4.2 stars, Dorman Bodies and Fender Parts provide both reliability and excellent performance. Choosing a Dorman Bodies and Fender Part from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Chrysler, Ford, GM Panel Retainer, Pack of 3
from $4.99
(1)
Chrysler, Ford, GM Panel Retainer, Pack of 3
“Good to have when taking anything apart on your vehicle as most of them will break on removal.”
Rivet-Push In-Hole Diameter .500 In-Head Diameter 1 In-Length .900 In
from $5.99
(1)
Rivet-Push In-Hole Diameter .500 In-Head Diameter 1 In-Length .900 In
“Used these to replace a couple broken rivets in fan shroud, and they fit well and worked great.”
Radiator Support Kit
from $75.99
(2)
Radiator Support Kit
“Everything was good.fit very well”

FAQs for 2018 GMC Sierra 3500 HD Bodies and Fender Parts

What are the best-selling Bodies and Fender Parts for 2018 GMC Sierra 3500 HDs?

Out of 159 Bodies and Fender Parts that fit 2018 GMC Sierra 3500 HDs, the following parts are the top sellers:

What’s the price range for 2018 GMC Sierra 3500 HD Bodies and Fender Parts?

The prices of Bodies and Fender Parts for the 2018 GMC Sierra 3500 HD range from $0.99 up to $1,799.99 for the most premium parts.

What is the average price of a Bodies and Fender Part for a 2018 GMC Sierra 3500 HD?

The average price for Bodies and Fender Parts for the 2018 GMC Sierra 3500 HD is $391.77. Keep in mind the variety of part types within our Bodies and Fender Part category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Bodies and Fender Parts for other GMC Sierra 3500 HD model years?

Yes, we carry Bodies and Fender Parts for 17 model years of GMC Sierra 3500 HDs between 2007 and 2025. The following model years are the most popular for Bodies and Fender Part purchases: 2023, 2022, 2021, 2020, 2019, 2017, 2016, 2015, and 2014.

What are the cheapest Bodies and Fender Parts for my 2018 GMC Sierra 3500 HD?

Does Advance Auto Parts sell Bodies and Fender Parts for any other 2018 GMC models?

What are the top-rated Bodies and Fender Parts that fit the 2018 GMC Sierra 3500 HD?

The one 2018 GMC Sierra 3500 HD Bodies and Fender Part we have in stock is the Panel Trim Retainer, Interior, GM/Ford/Chrysler (Sold by each). It costs $0.99.

What types of Bodies and Fender Parts do you sell for my 2018 GMC Sierra 3500 HD?

As of 11/2/25, these are some of the most in-demand types of Bodies and Fender Parts for a 2018 GMC Sierra 3500 HD:

Can I get help with 2018 GMC Sierra 3500 HD Bodies and Fender Part orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about GMC Bodies and Fender Parts and more.

What is your return policy for GMC Sierra 3500 HD Bodies and Fender Parts?

Advance Auto Parts keeps returns simple. For new GMC Sierra 3500 HD Bodies and Fender Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.