1999 GMC Sierra 1500 Differentials

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Keep Your 1999 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 1999 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 Differential 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 Motive Gear, National, and Dorman. For example, Motive Gear Differentials start at just $7.99 with an average 4.0 star rating. National and Dorman offer similar pricing and quality, backed by strong customer feedback. With over 2,136 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 1999 GMC Sierra 1500 Differential at Advance Auto Parts is around $327.43, with a range that starts at $1.89 and goes up to $2,370.00. With 289 options in stock from 16 trusted brands, finding the right fit is easy. Popular picks like Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket, Differential Cover, and 3 Qt – 80W90 Conventional Gear Oil With Posi Additive start at just $10.99 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 1999 GMC Sierra 1500 in peak condition, inside and out.

Essential 1999 GMC Sierra 1500 Differentials

Motive Gear – Differential Pinion Shim Kit (Part No.1102)

Differential Pinion Shim Kit

from

$9.99


Product Features:
  • KIT SHIM PINION
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Pro-King – Differential Cover Plug (Part No.742G484)

Differential Cover Plug

from

$6.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:
  • Meets or exceeds OE specifications
See More

Felpro – Axle Housing Cover Gasket: Irregular Shaped 14 Bolt Hole Gasket (Part No.RDS 55387)

Axle Housing Cover Gasket: Irregular Shaped 14 Bolt Hole Gasket

from

$8.99
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
  • Engineered for the sealing repair environment
  • Validated for fit, form and function
  • Unsurpassed quality you can trust
See More

Yukon Gear – Bearing Race Driver (Part No.56015)

Bearing Race Driver

from

$215.99
Bearing race driver. No return.

Product Features:
  • Bearing race driver
  • Fits HM88610 race
  • All steel construction
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Yukon Gear – Pinion Nut (Part No.33152)

Pinion Nut

from

$9.99
Pinion nut for GM 7.2″ IFS, 7.5″, 7.6″, 7.6″ IFS, 8.0″, 8.25″, 8.5″, 8.6″, 9.25″ IFS, 9.5″ & Oldsmobile Dropouts. 1 1/4″ socket, 7/8″ x 14 thread.

Product Features:
  • Pinion nut for GM 7.2″, 7.5″, 7.625″, 8.0″, 8.25″ IFS, 8.5″, 8.6″, 9.25″ IFS and 9.5″
  • 7/8″ x 14 thread
  • 1 1/4″ socket
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Yukon Gear – 3 Qt – Penzoil 80W90 Conventional Gear Oil (Part No.15002)

3 Qt - Penzoil 80W90 Conventional Gear Oil

from

$44.99
3 Qt. Penzoil 80W90 conventional gear Oil.

Product Features:
  • Includes three quarts of conventional oil
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Powertrax – No-Slip Traction System (Part No.9207053000)

No-Slip Traction System

from

$591.99
For vehicles that are driven daily, the Powertrax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Powertrax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. 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!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!
  • See More

    Yukon Gear – Left Hand Adjuster Lock Nut For 9.25" GM (Part No.33354)

    Left Hand Adjuster Lock Nut For 9.25" GM

    from

    $26.99
    Left hand adjuster lock nut for 9.25″ GM.

    Product Features:
    • Side adjuster lock nut
    • Fits GM 9.25″
    See More

    Motive Gear – Differential Ring Gear Bolt (Part No.14012703)

    Differential Ring Gear Bolt

    from

    $11.39
    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.
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    Pro-King – Differential Cross Shaft (Part No.742G673)

    Differential Cross Shaft

    from

    $28.49
    Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

    Product Features:
    • Meets or exceeds OE specifications
    See More

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

    Multi-Purpose Bearing

    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
    See More

    Yukon Gear – Differential Cover B (Part No.33572)

    Differential Cover B

    from

    $7.99
    Differential Cover B

    ATP – Remanufactured Front Differential Assembly (Part No.111506)

    Remanufactured Front Differential Assembly

    from

    $3207.00
    Brand new units are no longer available. ATP’s fully remanufactured differentials offer the best alternative to bench rebuilding or buying used. They are carefully inspected and totally reconditioned to meet original specifications and include new bearings and seals. Our units are ready to install, just add oil.

    Product Features:
    • Ready to install, just add oil
    • Totally reconditioned
    • New bearings
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    Yukon Gear – Positraction Clutch Guide (Part No.33352)

    Positraction Clutch Guide

    from

    $8.99
    Positraction clutch guide.

    Product Features:
    • Clutch guide for Chrysler 9.25″, Dana Spicer 44, Dana Spicer 50, Ford 8.8″, GM 12 bolt passenger car, GM 8.2″, 8.5″ and 8.6″, 1963-1979 Corvette and Nissan Titan
    • Compatible with Dura Grip positractions only
    See More

    Motive Gear – Differential Spool (Part No.FS10-30)

    Differential Spool

    from

    $187.99


    Product Features:
    • FULL SPOOL GM 8.5 30 SPL ST MUST USE 2-LM102911 & 2-LM102949
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    Motive Gear – Differential Carrier Gear Kit (Part No.GM9.5BI)

    Differential Carrier Gear Kit

    from

    $131.99


    Product Features:
    • GM9.5″ INTERNAL KIT (OPEN) 33 SPL. FRONT & REAR
    See More

    Dorman – Axle Shaft (Part No.630-146)

    Axle Shaft

    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
    See More

    Felpro – Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket (Part No.RDS 55477)

    Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket

    from

    $87.99
    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
    See More

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

    4 Wheel Drive Oil Seal

    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
    See More

    Dorman – Help – Differential Shaft Lock Bolt (Part No.81048)

    Differential Shaft Lock Bolt

    from

    $6.79
    This differential pinion shaft lock bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

    Product Features:
    • Direct replacement – this differential pinion shaft lock bolt matches the fit and function of the factory part on specified years, makes and models
    • Ideal solution – this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue
    • 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
    See More

    Yukon Gear – High Performance Ring & Pinion Gear Set For GM 8.25" IFS Reverse Rotation In A 4.56 Ratio (Part No.24154)

    High Performance Ring & Pinion Gear Set For GM 8.25" IFS Reverse Rotation In A 4.56 Ratio

    from

    $454.99
    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. 2010 GM 8.25IFS Front ends equipped w/ factory 3.08 gear will need a new carrier when changing ratio. When purchasing 3.42 & up gears for a factory 3.08 application you must also purchase a YC G26018131 case with it. Deck Height w/ 3.08 Ratio 1.780″ Deck height w/ 3.42 & up Ratio 1.920″.

    Product Features:
    • Fits 2013 and down GM 8.25″ IFS
    • 8.25″ ring gear diameter
    • 30 spline pinion
    • 10 ring gear bolts
    • 4.56 ratio
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    Yukon Gear – Differential Pinion (Part No.13110)

    Differential Pinion

    from

    $306.99
    Differential Pinion

    Yukon Gear – Standard Open Side Gear And Thrust Washer For 9.5" GM (Part No.33303)

    Standard Open Side Gear And Thrust Washer For 9.5" GM

    from

    $8.99
    Standard open side gear thrust washer for 9.5″ GM.

    Product Features:
    • Side gear thrust washer
    • Fits GM 9.5″
    See More

    Yukon Gear – Spider Gear Kit (Part No.16183)

    Spider Gear Kit

    from

    $238.99
    Spider Gear Kit

    Yukon Gear – Positraction Shim Kit (18 Shims) For GM 8.2", GM 8.5", 12T, 12P, Ford 8.8" & Cast Iron ‘Vette (Part No.16042)

    Positraction Shim Kit (18 Shims) For GM 8.2", GM 8.5", 12T, 12P, Ford 8.8" & Cast Iron 'Vette

    from

    $41.99
    Product Features:
    • Shim kit
    • Fits Ford 8.8″, 1963-1979 Corvette, GM 12 bolt passenger car and truck, 8.2″, 8.5″ and 8.6″ Dura Grip positraction
    See More

    Yukon Gear – Eaton-Type 14 Plate Carbon Clutch Set For 9.5" GM And 9.75" Ford (Part No.16058)

    Eaton-Type 14 Plate Carbon Clutch Set For 9.5" GM And 9.75" Ford

    from

    $362.99
    Eaton-type 14 plate Carbon clutch set for 9.5″ GM and 9.75″ Ford.

    Product Features:
    • Clutch kit
    • Fits GM 9.5″ with Eaton positraction
    • Carbon fiber clutches
    See More

    Yukon Gear – Differential Carrier (Part No.57015)

    Differential Carrier

    from

    $251.99
    Differential Carrier

    Yukon Gear – 8.6" GM 12P 12T & F8.8 Carrier Installation Kit (Part No.57010)

    8.6" GM 12P 12T & F8.8 Carrier Installation Kit

    from

    $121.99
    Yukon Carrier installation kits are great, low cost kit for carrier changes such as Positraction or locker upgrades. Carrier installation kit for GM 8.6″, 12 bolt car and 12 bolt truck differential. This kit contains carrier bearings, races and shims.

    Product Features:
    • Fits GM 12 bolt passenger car and truck and 8.6″
    • Includes carrier bearings and races and “super” carrier shim kit
    See More

    Most Popular Differential Bearings for 1999 GMC Sierra 1500s

    Enhance your 1999 GMC Sierra 1500 with one of the 3 Differential Bearings we have in stock, starting at just $10.99.

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

    Taper Bearing Cone

    from

    $10.99
    Value-priced bearing meets all cataloged application requirements.

    Product Features:
    • Brand may vary by location
    See More

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

    Multi-Purpose Bearing

    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
    See More

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

    Bearing - TRB (Tapered Roller Bearing)

    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
    See More

    Best-Selling 1999 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.

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

    MaxLife Multi-Vehicle Automatic Transmission Fluid, 1 Gallon

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

    3 Qt - 80W90 Conventional Gear Oil With Posi Additive

    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
    See More

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

    3 Qt - Penzoil 80W90 Conventional Gear Oil

    from

    $44.99
    3 Qt. Penzoil 80W90 conventional gear Oil.

    Product Features:
    • Includes three quarts of conventional oil
    See More

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

    Redline Synthetic "Shock Proof" Oil With Positraction Additive - 4 Quarts

    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
    See More

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

    Redline Synthetic "Shock Proof" Oil - 3 Quarts

    from

    $99.99
    Redline Synthetic “Shock Proof” Oil. 3 Quarts.

    Product Features:
    • Includes three quarts of Redline Shockproof oil
    See More

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

    Redline Synthetic "Shock Proof" Oil - 4 Quarts

    from

    $137.99
    Redline Synthetic “Shock Proof” Oil. 4 Quarts.

    Product Features:
    • Includes four quarts of Redline Shockproof oil
    See More

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

    Transmax ATF/CVT Universal Transmission Fluid, Smooth Performance, 1 Gallon

    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
    See More

    Top-Quality Rear Differential Cover Gaskets for 1999 GMC Sierra 1500s

    Choose a high-quality OEM or aftermarket Rear Differential Cover Gasket for GMC Sierra 1500s and enjoy top-notch performance from $10.99.

    Yukon Gear – 9.5" GM Cover Gasket (Part No.23023)

    9.5" GM Cover Gasket

    from

    $13.99
    9.5″ GM cover gasket.

    Product Features:
    • Cover gasket
    • Fits GM 9.5″
    See More

    Pro-King – Differential Cover Gasket (Part No.742G303A)

    Differential Cover Gasket

    from

    $31.49
    Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

    Product Features:
    • Meets or exceeds OE specifications
    See More

    Yukon Gear – 8.2" & 8.5" Rear Cover Gasket (Part No.23020)

    8.2" & 8.5" Rear Cover Gasket

    from

    $10.99
    8.2″ & 8.5″ rear cover gasket.

    Product Features:
    • Cover gasket
    • Fits GM 8.2″, 8.5″ and 8.6″
    See More

    Top Picks for 1999 GMC Sierra 1500 Differential Covers

    Invest in one of our 6 durable Differential Covers for your 1999 GMC, knowing you’re getting trusted brands and expert craftsmanship.

    ATP – DIFF COVER KIT (Part No.111107)

    DIFF COVER KIT

    from

    $52.99
    DIFF COVER KIT

    Dorman – Differential Cover (Part No.697-706)

    Differential Cover

    from

    $59.99
    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
    See More

    Yukon Gear – Chrome Cover For 8.6", 8.5" And 8.2" GM Rear (Part No.32017)

    Chrome Cover For 8.6", 8.5" And 8.2" GM Rear

    from

    $74.99
    Chrome cover for 8.6″, 8.5″ and 8.2″ GM rear.

    Product Features:
    • Fits GM 8.2″, 8.5″ and 8.6″
    • Chrome
    See More

    Yukon Gear – Steel Cover For GM 9.5", Threaded For Fill Plug, Plug Not Included (Part No.32333)

    Steel Cover For GM 9.5", Threaded For Fill Plug, Plug Not Included

    from

    $93.99
    Steel cover for GM 9.5″ Threaded for fill plug, fill plug not included.

    Product Features:
    • Fits GM 9.5″
    • Steel
    See More

    Yukon Gear – Polished Aluminum Cover For 8.6", 8.2" And 8.5" GM Rear (Part No.32030)

    Polished Aluminum Cover For 8.6", 8.2" And 8.5" GM Rear

    from

    $255.99
    Polished aluminum cover for 8.6″, 8.2″ and 8.5″ GM rear.

    Product Features:
    • Fits GM 8.5″ and 8.6″
    • Finned polished aluminum
    See More

    Pro-King – Differential Carrier Cover (Part No.742G758A)

    Differential Carrier Cover

    from

    $21.99
    Pro-King High Quality Differential Products are designed for trouble free installation and setup.

    Product Features:
    • Meets or exceeds OE specifications
    See More

    Our Top-Rated Rear Housing Cover Gaskets for 1999 GMC Sierra 1500s

    Make a smart move for your 1999 GMC Sierra 1500 with our Rear Housing Cover Gasket for $10.99.

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

    Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket

    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
    See More

    Top-Rated Differential Brands For Your 1999 GMC Sierra 1500

    When it comes to finding the perfect Differential for your 1999 GMC Sierra 1500, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 16 trusted brands. We carry the most popular Differential brands including National, Dorman, and Motive Gear, and more, all known for their exceptional customer ratings (average brand rating of 4.3 stars) and competitive prices, as low as $6.79. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1999 GMC Sierra 1500, providing peace of mind with parts that meet or exceed OEM standards.

    Popular National 1999 GMC Sierra 1500 Differentials

    If you’re looking for a top-quality Differential for your 1999 GMC Sierra 1500, Advance Auto Parts has exactly what you need with our selection of National Differentials. We have 3 National Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $11.99 and an average cost of $48.32, you’ll find the perfect Differential for your needs and budget. National Differentials for the 1999 GMC Sierra 1500 come highly rated, with over 12 customer reviews and an impressive average rating of 4.3 stars. Choosing a National Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
    Axle Differential Bearing & Seal Kit
    from $88.99
    (8)
    Axle Differential Bearing & Seal Kit
    “got exactly what i ordered. thanks.”
    Shaft Repair Sleeve
    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”
    Bearing Race
    from $11.99
    (2)
    Bearing Race
    “Reasonable price and woks well. front diff 2006 Escalade esv”

    Top-Quality Dorman 1999 GMC Sierra 1500 Differentials

    For those in search of a high-quality Differential for their 1999 GMC Sierra 1500, Advance Auto Parts offers a great selection of Dorman Differentials. With 3 Dorman 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 $6.79, with an average price of $160.26, giving you a range of options to suit your budget. Backed by over 25 customer ratings and an average rating of 4.2 stars, Dorman Differentials provide both reliability and excellent performance. Choosing a Dorman Differential from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
    Axle Shaft
    from $333.99
    (4)
    Axle Shaft
    “Perfect fit! Excellent quality.”
    Differential Shaft Lock Bolt
    from $6.79
    (11)
    Differential Shaft Lock Bolt
    “great”
    Differential Yoke including Seal and Pinion Nut
    from $139.99
    (10)
    Differential Yoke including Seal and Pinion Nut
    “Will this fot 2001 jeep grand cherokee 4.0 limited with dana 35 read end”

    FAQs for 1999 GMC Sierra 1500 Differentials

    What are the best-selling Differentials for 1999 GMC Sierra 1500s?

    Out of 289 Differentials that fit 1999 GMC Sierra 1500s, the following parts are the top sellers:

    What’s the price range for 1999 GMC Sierra 1500 Differentials?

    The prices of Differentials for the 1999 GMC Sierra 1500 range from $1.89 up to $2,370.00 for the most premium parts.

    What is the average price of a Differential for a 1999 GMC Sierra 1500?

    The average price for Differentials for the 1999 GMC Sierra 1500 is $327.43. 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 2000 and 2026. The following model years are the most popular for Differential purchases: 2023, 2022, 2021, 2020, 2019, 2018, 2017, 2016, and 2015.

    What are the cheapest Differentials for my 1999 GMC Sierra 1500?

    The cheapest 1999 GMC Sierra 1500 Differentials we carry are:

    Does Advance Auto Parts sell Differentials for any other 1999 GMC models?

    Yes. We stock Differentials for 23 other popular 1999 GMC models. Some of the most popular are 1999 Yukon Differentials, 1999 Savana 1500 Differentials, 1999 Savana 2500 Differentials, 1999 Jimmy Differentials, and 1999 K2500 Differentials.

    What are the top-rated Differentials that fit the 1999 GMC Sierra 1500?

    The one 1999 GMC Sierra 1500 Differential we have in stock is the Differential Pinion Washer. It costs $1.89.

    What types of Differentials do you sell for my 1999 GMC Sierra 1500?

    As of 3/1/26, these are some of the most in-demand types of Differentials for a 1999 GMC Sierra 1500:

    Can I get help with 1999 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.