2018 GMC Sierra 1500 Differentials

Please Select your Vehicle to See Exact Fit Parts

Keep Your 2018 GMC Sierra 1500 in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 2018 GMC Sierra 1500 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Bearings, Differential Oil, and Rear Housing Cover Gaskets. 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 Differentials from Trusted Brands

Looking for a reliable Differential? We’ve got you covered with options from brands you know and trust like National, Motive Gear, and Valvoline. For example, National Differentials start at just $11.99 with an average 4.3 star rating. Motive Gear and Valvoline offer similar pricing and quality, backed by strong customer feedback. With over 5,664 reviews and a solid 4 star average, you can shop with confidence knowing other GMC Sierra 1500 owners approve.

Competitive Prices and Extensive Inventory

The average price for a 2018 GMC Sierra 1500 Differential at Advance Auto Parts is around $339.49, with a range that starts at $2.99 and goes up to $3,014.99. With 106 options in stock from 17 trusted brands, finding the right fit is easy. Popular picks like 3 Qt – 80W90 Conventional Gear Oil With Posi Additive, Ring Gear Bolt, and 3 Qt – Penzoil 80W90 Conventional Gear Oil start at just $2.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Differential, don’t forget to check out other key components like 4WD Components and Universal Joints. At Advance Auto Parts, we’re here to help you keep your 2018 GMC Sierra 1500 in peak condition, inside and out.

Looking for the perfect Differential for your 2018 GMC Sierra 1500? You’re in the right place. Below, you’ll find links to various types of Differentials that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Differentials, ensuring durability and a precise fit for your GMC Sierra 1500. Whether you’re driving a 2018 model or another popular model year like 2014, 2015, 2016, 2017, 2019, 2020, 2021, 2022, and 2023, we’ve got you covered. Purchasing Differentials from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Differentials that fit your vehicle.

Essential 2018 GMC Sierra 1500 Differentials

from

$10.99

Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Unsurpassed quality you can trust
Validated for fit, form and function
Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes

from

$66.99

Richmond Gear is the leading manufacturer of professional quality, high-performance drivetrain products. Our complete line of products ranges from high performance ring-and-pinion sets for serious street and racing applications to torque-hungry manual transmissions and components. Richmond Gear products have been winners both at the Daytona 500 and U.S. Nationals for decades. WINNERS RUN RICHMOND!

Product Features:

For over 80-years, the Richmond Double-Diamond logo has represented some of the highest quality gears in the racing industry. Winners Run Richmond!
The superior quality of Richmond gearsets is a result of outstanding design, world class manufacturing and an extensive testing process that is performed on all products.
Richmond performance gearsets have been winners for decades at: NHRA, NMRA, NMCA, Daytona 500, WISSOTA and U.S. Nationals.
Richmond Gear is a leading manufacturer of high performance ring and pinion gearsets and drivetrain components, backed by a two year warranty.
Engineered to perform faster and be more reliable, Richmond performance drivetrain products are the result of a continuous research and development program combined with state-of-the-art manufacturing capabilities.

from

$69.99

This differential mount bushing is precision-engineered and rigorously tested to provide reliable replacement for the original equipment on specific vehicles.

Product Features:

Direct replacement – fits and performs like the original equipment on specific vehicles
Reliable fit – precision-engineered to match the design and dimensions of original components
Durable construction – manufactured to strict standards using sturdy, safe materials
Rigorously tested – thorough quality control measures ensure longevity

from

$34.99

Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.

Product Features:

PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION – Crowned raceways and rollers for even load distribution
OE-STYLE DESIGN – Engineered to meet OE specifications
COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on

from

$383.99

Yukon Bearing installation kits are perfect for shops & builders who have shims on the shelf and are looking to save cost over a Master Overhaul kit. This kit uses Timken bearings and races along with all high quality small parts. kit includes carrier bearings and races, pinion bearings and races, pinion seal, crush sleeve (if applicable), oil baffles and slingers (if applicable), marking compound and brush. Yukon does extensive research for each application to make sure your kit will arrive with all the correct parts you need to install your ring & pinion set.

Product Features:

Fits GM 8.25″ IFS
Included are carrier bearings and races, pinion bearings and races, pinion seal, crush sleeve , oil baffles and slingers , marking compound and brush.

from

$487.99

The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!

Product Features:

Powertrax® proves that you don’t have to choose between the superior traction of a locking differential and smooth handling and drivability of an open differential. Powertrax Lock-Right Lockers, No-Slip Traction Systems and GRIP limited slip differentials and lockers give you the best of both worlds!
The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.
Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.
Powertrax® offers three levels of GRIP locking differentials, ranging from the clutch-type GRIP LS with a forged steel case, the gear-driven GRIP PRO and finally the GRIP LOK for extreme traction.
Powertrax® = Extreme Traction Systems!

from

$21.99

8.75-42, 8.75-89, 9.25″ Chrysler & GM, 9.5″, 10.25″ pinion shim kit.

Product Features:

Pinion depth shim kit for Chrysler 8.75″ with ’42’ or ’89’ case housing, Chrysler 9.25″, GM 9.5″ and Ford 10.25″

from

$9.29

Motive Gear offers some of the toughest drive train components on the market today. If you are looking for the largest line of performance ring and pinion gear options available with gear sets in a wide range of ratios for nearly every application, both on and off-road, check out Motive Gear. Motive Gear products can be found in the winner’s circle at racing events worldwide. The superior quality of Motive Gear components is the result of years of racing development, outstanding design and state-of-the-art manufacturing methods. Extensive testing is performed on all products by our in-house engineers.

from

$21.99

Product Features:

KIT SHIM SIDE 9.5″ GM

from

$709.99

Differential Carrier

from

$114.99

This differential mount is precision-engineered and rigorously tested to provide reliable replacement for the original equipment on specific vehicles.

Product Features:

Direct replacement – fits and performs like the original equipment on specific vehicles
Reliable fit – precision-engineered to match the design and dimensions of original components
Durable construction – manufactured to strict standards using sturdy, safe materials
Rigorously tested – thorough quality control measures ensure longevity

from

$318.99

This axle shaft directly replaces the original equipment on certain vehicles, complete with all necessary application-specific installation components.

Product Features:

Direct replacement – this axle shaft replaces the original equipment on specific vehicle years, makes and models
Complete kit – each shaft includes critical installation hardware and components needed for specific vehicle applications
Durable construction – designed to rigorous standards and tested to ensure performance
Trustworthy solution – backed by team of engineers and quality control specialists in the United States

from

$211.99

Product Features:

GM10.5″ 14 BOLT OPEN EMPTY CASE 4:10 & DWN

from

$59.99

Ensure a leak-free repair when servicing a differential. This differential gasket is a direct replacement for the original gasket and should be replaced every time work is performed on the differential housing.

Product Features:

Ideal replacement – this differential directly replaces the original gasket
Required for routine service – this gasket should be replaced every time work is performed on the differential housing
Durable construction – this differential gasket is made of durable materials for leak-free performance
Quality tested – this gasket has been tested for a guaranteed fit

from

$26.99

Pinion seal for GM 9.25″ IFS.Yukon Mighty seal.

Product Features:

Pinion seal
Fits GM 9.25″ IFS

from

$205.99

PINION YOKE KIT

from

$184.99

This differential carrier bearing adjuster is designed to match the performance of an original equipment bearing adjuster on specified vehicle makes, models and years. It is engineered to help ensure that the preload on the carrier bearings can be adjusted accurately and that the bearings are correctly compressed so the differential operates properly with minimal noise and wear. This adjuster is manufactured to exacting specifications to reliably replace a factory bearing adjuster that is damaged or requires replacement when the differential is serviced.

Product Features:

Product Features:

Direct replacement – this differential carrier bearing adjuster is designed to match the performance of an original equipment bearing adjuster on specified vehicle makes, models and years
Ideal solution – manufactured to exacting specifications to reliably replace a factory bearing adjuster that is damaged or requires replacement when the differential is serviced
Restores function – engineered to help ensure that the preload on the carrier bearings can be adjusted accurately and that the bearings are correctly compressed so the differential operates properly
Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience

from

$35.99

Valvoline MaxLife Multi-Vehicle ATF is a full-synthetic formulation with advanced additives to prevent the major causes of transmission breakdown and help extend transmission life. Developed to help prevent leaks, maximize transmission performance, reduce transmission wear, and maintain smooth shifting longer than conventional fluids. It is suitable for use in a broad range of ATF applications including most Ford, GM, Toyota, Honda, Nissan, Hyundai, BMW, Mercedes, Volvo, VW & Audi. Recommended for use in the following applications: GM DEXRON-II, DEXRON-III, DEXRON-VI, Ford MERCON LV, Toyota/Lexus Type T, T-II, T-IV, WS, Honda/Acura, ATF-Z1, Nissan/Infiniti Matic-D, Matic-J, Matric-K, Matic-S, Hyundai/Kia SP-II, SP-III, SP-IV, SPH-IV, BMW 7045E, ETL 8072B, LA2634, LT71141, Allison C-4, Mercedes Benz NAG-1, Volvo 1161521, 1161540, 97340, 1273.41, and VW/Audi G-052-025-A2, G-052-162-A1. For CVT applications Valvoline recommends Valvoline Full Synthetic CVT Fluid.

Product Features:

Formulated with full-synthetic base oils and long life friction modifiers to help improve smooth shifting, eliminate slippage and shudder, prevent clutch wear and improve drivability longer than conventional fluids
High-performance seal conditioners maintain and preserve the elasticity of seals to help prevent leaks in high mileage transmissions
Developed with anti-wear technology to help improve transmission durability
Engineered with a proprietary blend of base oils and advanced additives to provide better oil flow at low temperatures and greater film protection at higher temperatures

from

$1879.99

Remanufactured Rear Axle assemblies are completely disassembled, thoroughly cleaned and reassembled using new wear parts. Units are assembled, sealed & include backing plates, axle shafts & fluid.

Product Features:

Rear axles are assembled with backing plates & axle shafts, and filled with fluid prior to shipping
Axles are fully painted & shipped securely in environmentally safe and recyclable containers that are the perfect size for returning your original core
Our complete Rear axle assemblies mean you just hang brakes, connect suspension & go! Your installation will be simple and trouble free
Remember to match axle ratio to original. For 4WD rear axle must match front axle ratio

from

$389.99

Yukon Ring & Pinion sets give you the confidence of knowing you’re running gears designed for the harshest of conditions. Whether it’s on the street, off-road, or at the track; Yukon ring & pinion sets deliver unrivaled performance & quality. Yukon uses the latest designs and manufacturing technologies to provide a quiet running gear that is strong and easy to set up. All Yukon ring & pinion sets come standard with a one-year warranty. This gear set does not have an ABS provision on the pinion.

Product Features:

Fits GM 8.5″ and 8.6″
8.50″ ring gear diameter
30 spline pinion
10 ring gear bolts
5.13 ratio

from

$39.99

This axle differential seal is designed to match the fit and function of the original seal on specified vehicles, and is engineered for durability and reliable performance.

Product Features:

Direct replacement – this axle differential seal is designed to match the fit and function of the original seal on specified vehicles
Restores functionality – this seal is made to fit and fully restore part functionality after the original seal fails
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

from

$2.99

Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:

Meets or exceeds OE specifications

from

$79.99

Product Features:

MINI INSTALL KIT-GM9.5/CHRY9.25 FRT

from

$123.99

Product Features:

Fits GM 8.2″, 8.5″ and 8.6″
Steel

from

$27.99

Product Features:

CONSISTENT PERFORMANCE: Matched cup and cone components ensure consistent performance
PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION: Crowned raceways and rollers for even load distribution
OE-STYLE DESIGN: Engineered to meet OE specifications
COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on

from

$439.99

USA Standard Master Overhaul kits let you finish your install with confidence. This kit uses Koyo bearings and races. Included are carrier bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush sleeve (if applicable), oil baffles and slingers (if applicable), threading locking compound, marking compound with brush and gasket.

Product Features:

Master Overhaul Rebuild Kit
Fits 2014 and up GM 9.5″ w/ 12 bolt rear cover
USA Standard offers the Most Comprehensive and Complete Master Rebuild Kit on the Market

from

$44.99

Product Features:

CONSISTENT PERFORMANCE: Matched cup and cone components ensure consistent performance
PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION: Crowned raceways and rollers for even load distribution
OE-STYLE DESIGN: Engineered to meet OE specifications
COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on

Popular 2018 GMC Sierra 1500 Differentials Categories

Differential Oil

Differential Covers

Differential Mounts

Differential Mount Bushings

Differential Bearings

Differential Axle Shafts

Differential Pinion Pilot Bearings

Differential Carriers

Differential Bearing Kits

Front Differential Pinion Bearings

Differential Rebuild Kits

Differential Carrier Shim Kits

Differential Pinion Seals

Differential Ring and Pinions

Differential Cases

Differential End Yokes

Differential Lock Assemblies

Differential Carrier Bearing Adjusters

Differential Carrier Bushings

Front Differential Cover Gaskets

Rear Housing Cover Gaskets

Differential Seals

Complete Differentials

Differential Ring Gear Bolts

Differential Pinion Shafts

Differential Crush Sleeves

Differential Pinion Shims

Differential Pinion Shaft Nuts

Differential Gear Install Kits

Differential Ring and Pinion Kits

Axle Differential Bearing and Race Set

Most Popular Differential Bearings for 2018 GMC Sierra 1500s

Enhance your 2018 GMC Sierra 1500 with one of the 4 Differential Bearings we have in stock, starting at just $10.99.

show more show less

from

$10.99

Value-priced bearing meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$27.99

Product Features:

CONSISTENT PERFORMANCE: Matched cup and cone components ensure consistent performance
PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION: Crowned raceways and rollers for even load distribution
OE-STYLE DESIGN: Engineered to meet OE specifications
COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on

from

$38.99

Product Features:

PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION: Crowned raceways and rollers for even load distribution
OE-STYLE DESIGN: Engineered to meet OE specifications
COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on

from

$34.49

With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.

Product Features:

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

Best-Selling 2018 GMC Sierra 1500 Differential Oil

Upgrade your Sierra 1500 with one of our 7 best-selling Differential Oil, earning an average 5 stars rating across 446 reviews.

show more show less

from

$35.99

Formulated with full-synthetic base oils and long life friction modifiers to help improve smooth shifting, eliminate slippage and shudder, prevent clutch wear and improve drivability longer than conventional fluids
High-performance seal conditioners maintain and preserve the elasticity of seals to help prevent leaks in high mileage transmissions
Developed with anti-wear technology to help improve transmission durability
Engineered with a proprietary blend of base oils and advanced additives to provide better oil flow at low temperatures and greater film protection at higher temperatures

from

$57.99

3 Qt. Penzoil 80W90 conventional gear Oil. W/ bottle of Posi additive.

Product Features:

Includes three quarts of conventional oil and one 4oz bottle of Yukon positraction additive

from

$44.99

3 Qt. Penzoil 80W90 conventional gear Oil.

Product Features:

Includes three quarts of conventional oil

from

$148.99

Redline Synthetic “Shock Proof” Oil with positraction Additive. 4 Quarts.

Product Features:

Includes four quarts of Redline Shockproof oil and one 4oz bottle of Yukon positraction additive

from

$99.99

Redline Synthetic “Shock Proof” Oil. 3 Quarts.

Product Features:

Includes three quarts of Redline Shockproof oil

from

$137.99

Redline Synthetic “Shock Proof” Oil. 4 Quarts.

Product Features:

Includes four quarts of Redline Shockproof oil

from

$28.99

Castrol® Transmax® ATF/CVT Universal is a premium full-synthetic transmission fluid engineered for exceptional performance in both traditional step-shifting automatic transmissions and modern continuously variable transmissions (CVTs). Featuring Castrol Smooth Drive® Technology, it ensures enhanced friction durability for seamless gear shifts and superior high-temperature protection to resist oxidation. This advanced formulation offers unmatched protection against copper corrosion, extending the life of your transmission system. Its broad compatibility covers a wide range of ATF and CVT applications, including Dexron VI, Mercon LV, Toyota WS, Honda DW-1, Nissan Matic S, and many more, making it ideal for diverse vehicle types, including hybrids. Designed to improve workshop efficiency and simplify inventory management, this fluid is a versatile solution for professional mechanics and DIY enthusiasts alike. Packaged in a convenient 1-gallon size, it delivers outstanding value and reliability for maintaining optimal transmission performance.

Product Features:

Enhanced friction durability for smooth transmission performance
Superior high temperature protection to effectively resist oxidation
Unsurpassed protection against copper corrosion
Broad scope of vehicle applications improves workshop efficiency and inventory management
ATF Applications: Dexron VI (Dexron III, Dexron), Mercon LV (Mercon SP, Mercon V, Mercon), JASO 1A (03), JASO 1A LV (13), Toyota T IV, Toyota T III, Toyota WS, Honda/Acura DW 1/Z 1, Nissan Matic D, Matic J, Matic S, Hyundai/Kia SP IV, SP III
ATF Applications: Mazda ATF M-V, M-III, FZ, Mitsubishi SP IV, SP III, IIM, II, PA, J3, VW/Audi (6, 8 & 9 speed automatics), BMW/Mini (6, 8 and 9 speed automatics), Jaguar/Land Rover (6, 8 & 9 speed automatics), Porsche (6, 8 & 9 speed automatics)
ATF Applications: Volvo (6, 8 and 9 speed automatics), Volvo Transmission Oil 97342, AT102, Mercedes-Benz (7 and 9 speed automatics)
CVT Applications: Toyota CVT Fluid TC, Toyota CVT Fluid FE , Nissan CVT Fluid NS-1, Nissan CVT Fluid NS-2, Nissan CVT Fluid NS-3, Subaru i-CVT Fluid, Subaru i-CVT FG, Subaru Lineartronic High Torque Chain CVTF, Honda HCF-2

Top-Quality Rear Housing Cover Gaskets for 2018 GMC Sierra 1500s

Choose a high-quality OEM or aftermarket Rear Housing Cover Gasket for GMC Sierra 1500s and enjoy top-notch performance from $16.99.

show more show less

from

$52.99

Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust.

Product Features:

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Unsurpassed quality you can trust
Validated for fit, form and function
Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes

from

$16.99

Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust.

Product Features:

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Unsurpassed quality you can trust
Validated for fit, form and function
Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes

from

$16.99

Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust.

Product Features:

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Unsurpassed quality you can trust
Validated for fit, form and function
Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes

from

$34.99

Axle Housing Cover Gasket

from

$28.99

Axle Housing Cover Gasket

Top Picks for 2018 GMC Sierra 1500 Differential Axle Shafts

Invest in one of our 3 durable Differential Axle Shafts for your 2018 GMC, knowing you’re getting trusted brands and expert craftsmanship.

show more show less

from

$299.99

2007 and up 9.5″ GM axle, 34.02″. axle shaft for ’07 & up GM truck with 9.5″ differential, 34.02″ long, 6 lug. Yukon 1541H alloy axles offer a strength increase over stock while retaining a low cost. Yukon 1541H alloy front axles come with a one year warranty against manufacturing defects.

Product Features:

33 spline
34.02″ long
Fits GM 9.5″ in 2007 and up truck

from

$438.99

This axle shaft directly replaces the original equipment on certain vehicles, complete with all necessary application-specific installation components.

Product Features:

Direct replacement – this axle shaft replaces the original equipment on specific vehicle years, makes and models
Complete kit – each shaft includes critical installation hardware and components needed for specific vehicle applications
Durable construction – designed to rigorous standards and tested to ensure performance
Trustworthy solution – backed by team of engineers and quality control specialists in the United States

from

$283.99

Axle shaft damaged or bearings worn out- This axle shaft assembly directly replaces the original equipment on certain vehicles, ready for install right out of the box.

Product Features:

Direct replacement – this axle shaft assembly replaces the original equipment on specific vehicle years, makes and models
Ready to install – comes pre-assembled for simple installation with no further assembly required
Durable construction – designed to rigorous standards and tested to ensure performance
Trustworthy solution – backed by team of engineers and quality control specialists in the United States

Differential Covers for 2018 GMC Sierra 1500s

Make a smart move for your 2018 GMC Sierra 1500 with products all priced from $79.99 to $328.99.

show more show less

from

$79.99

This direct replacement differential cover matches the fit and function of the original equipment diff cover for a reliable, leak-free repair. It features a durable design, made to strict specifications, to help ensure reliable service life.

Product Features:

Direct replacement – this differential cover matches the fit and function of the original equipment diff cover on select vehicles
Reliable repair – the smart solution for fixing an existing cover that’s rusted, damaged or leaking differential fluid
Durable construction – this differential cover is made according to strict engineering standards to help ensure dependability
Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience

from

$298.99

aFe Power’s new rear differential cover brings performance engineering to the protection of your axle’s differential. This differential cover is constructed out of durable cast aluminum with reinforcing ribs for maximum strength and comes with all necessary hardware for easy installation. This cover has a raw finish with machined fins for a distinctive look.

Product Features:

Durable Cast Aluminum
Magnetic Drain Plug Captures Loose Particles
Calibration Plug Set to Factory Fill Level Eliminates Overfilling
Built-In External and Internal Fins Dissipate Heat

from

$123.99

Product Features:

Fits GM 8.2″, 8.5″ and 8.6″
Steel

from

$96.99

DiffrlCover

from

$328.99

aFe Power’s new rear differential cover brings performance engineering to the protection of your axle’s differential. This differential cover is constructed out of durable cast aluminum with reinforcing ribs for maximum strength and comes with all necessary hardware for easy installation. Pro Series differential covers include an oil level sight glass and magnetic deep reach fill plug. This cover is finished with black powder-coating and machined fins for a distinctive look.

Product Features:

Durable Cast Aluminum
Magnetic Drain and Fill Plugs Capture Loose Particles
Calibration Plug Set to Factory Fill Level Eliminates Overfilling
Oil Level Sight Glass for Quick/Easy Inspection

Top-Rated Differential Brands For Your 2018 GMC Sierra 1500

When it comes to finding the perfect Differential for your 2018 GMC Sierra 1500, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 17 trusted brands. We carry the most popular Differential brands including Valvoline, National, and Motive Gear, and more, all known for their exceptional customer ratings (average brand rating of 4.8 stars) and competitive prices, as low as $7.99. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 2018 GMC Sierra 1500, providing peace of mind with parts that meet or exceed OEM standards.

Popular Valvoline 2018 GMC Sierra 1500 Differentials

If you’re looking for a top-quality Differential for your 2018 GMC Sierra 1500, Advance Auto Parts has exactly what you need with our selection of Valvoline Differentials. We have 1 Valvoline Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $35.99, you’ll find the perfect Differential for your needs and budget. Valvoline Differentials for the 2018 GMC Sierra 1500 come highly rated, with over 446 customer reviews and an impressive average rating of 4.8 stars. Choosing a Valvoline Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.

from $35.99

(446)

MaxLife Multi-Vehicle Automatic Transmission Fluid, 1 Gallon

“Good quality great price”

Top-Quality National 2018 GMC Sierra 1500 Differentials

For those in search of a high-quality Differential for their 2018 GMC Sierra 1500, Advance Auto Parts offers a great selection of National Differentials. With 3 National Differentials in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Differentials start at just $11.99, with an average price of $27.99, giving you a range of options to suit your budget. Backed by over 5 customer ratings and an average rating of 4.3 stars, National Differentials provide both reliability and excellent performance. Choosing a National Differential from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.

from $43.99

(2)

Shaft Repair Sleeve

“As a mechanic I dont have time or money to waste on inferior products, which this is not. Great product,great price”

from $27.99

(1)

Multi-Purpose Bearing

“great price”

from $11.99

(2)

Bearing Race

“Reasonable price and woks well. front diff 2006 Escalade esv”

FAQs for 2018 GMC Sierra 1500 Differentials

What are the best-selling Differentials for 2018 GMC Sierra 1500s?

Out of 106 Differentials that fit 2018 GMC Sierra 1500s, the following parts are the top sellers:

3 Qt – 80W90 Conventional Gear Oil With Posi Additive (11645418) – $57.99
Ring Gear Bolt (20520168) – $2.99
3 Qt – Penzoil 80W90 Conventional Gear Oil (11644279) – $44.99

What’s the price range for 2018 GMC Sierra 1500 Differentials?

The prices of Differentials for the 2018 GMC Sierra 1500 range from $2.99 up to $3,014.99 for the most premium parts.

What is the average price of a Differential for a 2018 GMC Sierra 1500?

The average price for Differentials for the 2018 GMC Sierra 1500 is $339.49. Keep in mind the variety of part types within our Differential category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Differentials for other GMC Sierra 1500 model years?

Yes, we carry Differentials for 26 model years of GMC Sierra 1500s between 1999 and 2026. The following model years are the most popular for Differential purchases: 2023, 2022, 2021, 2020, 2019, 2017, 2016, 2015, and 2014.

What are the cheapest Differentials for my 2018 GMC Sierra 1500?

The cheapest 2018 GMC Sierra 1500 Differentials we carry are:

Ring Gear Bolt (20520168) – $2.99
Differential Crush Sleeve (20520169) – $2.99
Differential Pinion Shim Kit (20520100) – $7.99
Differential Carrier Shim Kit (19640063) – $8.99
Pinion Nut (10954736) – $9.29

Does Advance Auto Parts sell Differentials for any other 2018 GMC models?

Yes. We stock Differentials for 9 other popular 2018 GMC models. Some of the most popular are 2018 Yukon Differentials, 2018 Sierra 2500 HD Differentials, 2018 Savana 2500 Differentials, 2018 Sierra 3500 HD Differentials, and 2018 Savana 3500 Differentials.

What are the top-rated Differentials that fit the 2018 GMC Sierra 1500?

The one 2018 GMC Sierra 1500 Differential we have in stock is the Ring Gear Bolt. It costs $2.99.

What types of Differentials do you sell for my 2018 GMC Sierra 1500?

As of 3/1/26, these are some of the most in-demand types of Differentials for a 2018 GMC Sierra 1500:

Can I get help with 2018 GMC Sierra 1500 Differential orders?

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

What is your return policy for GMC Sierra 1500 Differentials?

Advance Auto Parts keeps returns simple. For new GMC Sierra 1500 Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

2018 GMC Sierra 1500 Differentials

Felpro – Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket (Part No.RDS 55028-1)

Richmond Gear – Differential Cross Shaft (Part No.80-0272-1)

Dorman – Suspension Differential Mount Bushing (Part No.523-268)

National – Tapered Roller Bearing Cone (Part No.M804049)

Yukon Gear – Bearing Install Kit For ’99 & Newer GM 8.25" IFS Differential (Part No.11104)

Powertrax – Lock Right Locker (Part No.1950-LR)

Yukon Gear – Pinion Depth Shims For Chrysler 8.75", 9.25", GM 9.5" & Ford 10.25" (Part No.55059)

Motive Gear – Pinion Nut (Part No.1260823)

Motive Gear – Differential Carrier Shim Kit (Part No.GM9.5SSK)

Yukon Gear – Differential Carrier (Part No.20142)

Dorman – Position Differential Support (Part No.523-240)

Dorman – Axle Shaft (Part No.630-146)

Motive Gear – Differential Carrier (Part No.6258336)

Dorman – Differential Case Gasket Kit (Part No.926-817)

Yukon Gear – Pinion Seal For GM 9.25" IFS (Part No.30153)

Dorman – PINION YOKE KIT (Part No.697-156)

Dorman – Differential Side Bearing Adjuster Kit (Part No.697-042)

Valvoline – MaxLife Multi-Vehicle Automatic Transmission Fluid, 1 Gallon (Part No.773775)

Spartan – Drive Axle Assembly; GM 1500 Posi Axle GU5 (Part No.RAXP2258A)

Yukon Gear – High Performance Ring & Pinion Gear Set For GM 8.5" & 8.6" In A 5.13 Ratio (Part No.24163)

Dorman – 4 Wheel Drive Oil Seal (Part No.600-606)

Pro-King – Differential Ring Gear Bolt (Part No.742G935)

Motive Gear – Differential Gear Install Kit (Part No.GM9.5IKL)

Yukon Gear – Steel Cover For GM 8.2" & 8.5" Rear (Part No.32332)

National – Multi-Purpose Bearing (Part No.A-36)

USA Standard Gear – Master Overhaul Kit for 2014 & Up GM 9.5" 12 Bolt Differential (Part No.37118)

National – Multi-Purpose Bearing (Part No.A-42)

Driveworks – Taper Bearing Cone (Part No.S-LM-501349)

National – Multi-Purpose Bearing (Part No.A-36)

National – Tapered Roller Bearing Cone (Part No.JLM506849A)

Schaeffler – Bearing – TRB (Tapered Roller Bearing) (Part No.KT36)

Valvoline – MaxLife Multi-Vehicle Automatic Transmission Fluid, 1 Gallon (Part No.773775)

Yukon Gear – 3 Qt – 80W90 Conventional Gear Oil With Posi Additive (Part No.15003)

Yukon Gear – 3 Qt – Penzoil 80W90 Conventional Gear Oil (Part No.15002)

Yukon Gear – Redline Synthetic "Shock Proof" Oil With Positraction Additive – 4 Quarts (Part No.15005)

Yukon Gear – Redline Synthetic "Shock Proof" Oil – 3 Quarts (Part No.15000)

Yukon Gear – Redline Synthetic "Shock Proof" Oil – 4 Quarts (Part No.15004)

Castrol – Transmax ATF/CVT Universal Transmission Fluid, Smooth Performance, 1 Gallon (Part No.15E0C8)

Felpro – Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket (Part No.RDS 55480)

Felpro – Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket (Part No.RDS 55040)

Felpro – Axle Housing Cover Gasket Irregular Shaped 14 Bolt Hole Gasket (Part No.RDS 55486)

GM Genuine Parts – Axle Housing Cover Gasket (Part No.15860607)

Felpro – Axle Housing Cover Gasket (Part No.55498)

Yukon Gear – Axle For ’07 And Up 9.5" GM Axle, 34.02" (Part No.21586)

Dorman – Axle Shaft – or Side (Part No.630-325)

Dorman – Inner Axle Shaft Assembly (Part No.630-638)

Dorman – Differential Cover Assembly (Part No.697-727)

aFe POWER – Differential Cover (Part No.46-71120A)

Yukon Gear – Steel Cover For GM 8.2" & 8.5" Rear (Part No.32332)

Yukon Gear – DiffrlCover (Part No.32365)

aFe POWER – Differential Cover (Part No.46-71120B)