1979 GMC C2500 Differentials

Keep Your 1979 GMC C2500 in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1979 GMC C2500 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Covers, Differential Oil, and Differential Bearings. 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, Valvoline, and Richmond Gear. For example, National Differentials start at just $10.99 with an average 4.3 star rating. Valvoline and Richmond Gear offer similar pricing and quality, backed by strong customer feedback. With over 172 reviews and a solid 4 star average, you can shop with confidence knowing other GMC C2500 owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1979 GMC C2500 Differential at Advance Auto Parts is around $220.92, with a range that starts at $0.91 and goes up to $1,141.99. With 179 options in stock from 14 trusted brands, finding the right fit is easy. Popular picks like DEXRON – VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart, DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart, and Differential Shaft Lock Bolt start at just $6.79 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 Drive Shafts and Axles and Universal Joints. At Advance Auto Parts, we’re here to help you keep your 1979 GMC C2500 in peak condition, inside and out.

Essential 1979 GMC C2500 Differentials

Yukon Gear – Pinion Install Kit For ’99 & Newer 10.5" GM 14 Bolt Truck Differential (Part No.13106)

Pinion Install Kit For '99 & Newer 10.5" GM 14 Bolt Truck Differential

from

$449.99
Yukon Pinion installation kits are a terrific solution for gear installation on lower mileage vehicles where the carrier bearings & races can be reused. This kit uses Timken bearings and races along with a high quality pinion seal and small parts. Included in this kit are the pinion bearings and races, pilot bearing (if applicable), crush sleeve (if applicable), complete pinion shim kit, thread locker, and marking compound with 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 pinion gear.

Product Features:
  • Fits 1998 and up GM 10.5″ 14 bolt truck
  • Included are pinion bearings and races, pinion seal, crush sleeve, complete pinion shim kit, and marking compound with brush.
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

Yukon Gear – Minor Install Kit For GM 8.5" Rear Differential (Part No.12055)

Minor Install Kit For GM 8.5" Rear Differential

from

$48.99
Yukon Minimum installation kits are a low cost solution for gear changes in newer vehicles where the bearings can be reused. This kit uses all high quality components to ensure a smooth set up. kit includes a pinion seal, crush sleeve (if applicable), complete shim kit, marking compound and brush. (includes Supershims)

Product Features:
  • Fits GM 8.5″ rear
  • Included are a pinion seal, crush sleeve , complete shim kit, marking compound and brush.
See More

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

Motive Gear – Differential Carrier Gear Kit (Part No.GM14BI)

Differential Carrier Gear Kit

from

$266.99


Product Features:
  • GM10.5″ INTERNAL KIT (OPEN) 30 SPL
See More

Mobil 1 – 75W-90 Full Synthetic Gear Lubricant, Extends Gear Life, 1 Quart (Part No.26101)

75W-90 Full Synthetic Gear Lubricant, Extends Gear Life, 1 Quart

from

$19.99
Mobil 1 Synthetic Gear Lubricant LS 75W-90 is a supreme, multi-purpose automotive gear lubricant that helps to provide exceptional thermal stability and resistance to high temperature oxidation, extending gear life due to minimal deposits. Helps to deliver outstanding protection against low speed/high torque wear with the capability to handle severe driving conditions while delivering smooth efficient performance. Mobil 1 Synthetic Gear Lubricant LS provides exceptional shear stability, corrosion protection, and enhanced frictional properties. Compared to conventional hypoid gear lubricants, Mobil 1 LS 75W-90 performs exceptionally over a wide range of temperatures to reduce wear at start up. Mobil 1 gear lube helps to minimize leakage and reduce contamination while providing good resistance to foaming to maintain film strength for reliable lubrication. Meets or exceeds the requirements of the following industry specifications: API GL-5.

Product Features:
  • Mobil 1 LS synthetic automotive gear lubricant exceeds the highest level of performance requirements of modern passenger vehicles
  • Helps to provide exceptional thermal stability and resistance to high temperature oxidation and extend gear life due to minimal deposits
  • Delivers outstanding protection against low speed/high torque wear, handling severe driving conditions with smooth, efficient performance
  • Compared to conventional hypoid gear lubricants, performs exceptionally over a wide range of temperatures to reduce wear at start up
  • Provides exceptional shear stability, corrosion protection, and enhanced frictional properties
  • Manufacturer Part Number: 104361
See More

Yukon Gear – Adapter Sleeve Fro GM 11.5" & 10.5" 14 Bolt Truck Yokes To Use Triple Lip Pinion Seal (Part No.41209)

Adapter Sleeve Fro GM 11.5" & 10.5" 14 Bolt Truck Yokes To Use Triple Lip Pinion Seal

from

$29.99
Product Features:
  • Adapter sleeve
  • Fits GM 10.5″ 14 bolt truck and GM 11.5″
  • Converts to triple lip seal
See More

Motive Gear – Differential Bearing Kit – Timken (Part No.R12RT)

Differential Bearing Kit - Timken

from

$106.99
Motive Gear Differential Bearing Kits Include Front & Rear Pinion Bearing, Pinion Seal, Carrier Bearings, Pilot Bearing Where Applicable, Gear Marking Compound, Crush Sleeve, Pinion Nut, Brush, Thread Locking Compound And Cover Gasket Or Rtv

Product Features:
  • KIT BRG & SEAL GM 12 BLT TRK 8 7/8″
See More

Yukon Gear – 8.5" & 8.6" GM Standard Open Pinion Gear Thrust Washer – Also Fits 8.5" Eaton With 0.795" Cross Pin (Part No.33385)

8.5" & 8.6" GM Standard Open Pinion Gear Thrust Washer - Also Fits 8.5" Eaton With 0.795" Cross Pin

from

$10.99
8.5″ & 8.6″ GM standard Open pinion gear Thrust washer. also fits 8.5″ Eaton with 0.795″ cross pin.

Product Features:
  • Pinion gear thrust washer for GM 8.5″ and 8.6″
  • Fits standard open differentials only
  • 0.795″ I.D.
See More

Yukon Gear – DiffrlPinSupportBolt (Part No.33582)

DiffrlPinSupportBolt

from

$5.99
DiffrlPinSupportBolt

Richmond Gear – Differential Cross Shaft (Part No.80-0269-1)

Differential Cross Shaft

from

$64.99
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.
See More

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

Steel Cover For GM 8.2" & 8.5" Rear

from

$123.99
Product Features:
  • Fits GM 8.2″, 8.5″ and 8.6″
  • Steel
See More

Yukon Gear – Bearing Race Driver (Part No.56020)

Bearing Race Driver

from

$215.99
Bearing race driver. No return.

Product Features:
  • Bearing race driver
  • Fits M802011 race
  • All steel construction
See More

Powertrax – No-Slip Traction System (Part No.9207853005)

No-Slip Traction System

from

$544.99
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 – 10.5" GM 14 Bolt Truck Pinion Nut (Part No.33148)

    10.5" GM 14 Bolt Truck Pinion Nut

    from

    $48.99
    10.5″ GM 14 bolt truck pinion nut. 1 1/2″ socket, 15/16″ x 16 thread.

    Product Features:
    • Pinion nut for GM 10.5″ 14 bolt truck
    • 15/16″ x 16 thread
    • 1.5″ socket
    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

    Richmond Gear – MiniSpool (Part No.78-1230-1)

    MiniSpool

    from

    $151.99
    MiniSpool

    Motive Gear – Differential Carrier (Part No.6258336)

    Differential Carrier

    from

    $211.99


    Product Features:
    • GM10.5″ 14 BOLT OPEN EMPTY CASE 4:10 & DWN
    See More

    Motive Gear – Ring Gear Bolt (Part No.331421)

    Ring Gear Bolt

    from

    $9.99
    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.
    See More

    Yukon Gear – Crush Sleeve (Part No.33099)

    Crush Sleeve

    from

    $13.99
    Crush Sleeve for Chrysler 9.25″ front, GM 8.6″ IRS, 9.25″ IFS & 9.5″. Approx 0.640″ long.

    Product Features:
    • Crush sleeve for Chrysler 9.25″ front, GM 8.6″ IRS, 9.25″ IFS and 9.5″
    • 0.640″ tall
    See More

    Yukon Gear – Dura Grip Positraction For 10.5" GM 14 Bolt Truck, 4.10 & Down (Part No.26030)

    Dura Grip Positraction For 10.5" GM 14 Bolt Truck, 4.10 & Down

    from

    $1110.00
    The Yukon Dura Grip provides aggressive yet smooth traction to give you the confidence & performance you need. Get longer life and better traction with the heavy duty Yukon Dura Grip Positraction. The Yukon Dura Grip uses a nodular case and forged 4320 internals for added strength along with composite clutches for high performance and long life. All units are Rebuildable and many offer upgrades to increase aggressiveness for racing applications. Each unit carries a one year warranty against defects.

    Product Features:
    • Fits GM 10.5″ 14 bolt truck
    • 4.10 ratio and down only
    • Clutch style positraction
    • Internal gears are manufactured using forged 4320 steel and cut to provide stronger teeth
    • Fully rebuildable
    • Assembled in the USA
    See More

    Motive Gear – Axle Shaft (Part No.MG1775)

    Axle Shaft

    from

    $141.99
    The Motive Gear replacement axle shaft offers an OE-quality axle shaft at a fraction of the OE cost. Manufactured from 1541H material on high-tolerance CNC equipment, this axle shaft is designed to provide a perfect fit every time.

    Product Features:
    • AXLE SHAFT GM 10.5″ 30 SPL. 31 11/16″ L.H.
    See More

    National – Tapered Roller Bearing Cone (Part No.HM803149)

    Tapered Roller Bearing Cone

    from

    $36.99
    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
    See More

    National – Bearing Race (Part No.HM903210)

    Bearing Race

    from

    $28.49
    Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.

    Product Features:
    • PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
    • SMOOTH ROTATION – Crowned raceways 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 – Super Carrier Shim Kit For Ford 7.5", GM 7.5", 8.2" & 8.5" (Part No.55001)

    Super Carrier Shim Kit For Ford 7.5", GM 7.5", 8.2" & 8.5"

    from

    $59.99
    Product Features:
    • Super carrier shim kit for Ford 7.5″, GM 7.5″, 7.625″, 7.6″ IFS, 7.6″ IRS, 7.75″, 8.2″, 8.2″ Buick, Oldsmobile and Pontiac and GM 8.5″ front and rear
    • Interlocking design makes installation much easier
    See More

    Yukon Gear – Cross Pin Bolt (Part No.33067)

    Cross Pin Bolt

    from

    $6.99
    Cross pin bolt for Chrysler 8.25″, 9.25″ rear, Ford 7.5″, 8.8″, GM 12 bolt car & truck, 7.2″ IFs, 7.5″, 7.6″, 8.0″, 8.25″ IFS & 8.5″.

    Product Features:
    • Cross pin bolt for Chrysler 8.25″ and 9.25″ rear, Ford 7.5″ and 8.8″, GM 12 botl car and truck, 8.5″, 8.25″ IFS, 8.0″, 7.625″, 7.5″ and 7.2″ IFS
    See More

    Yukon Gear – High Performance Ring & Pinion "Thick" Gear Set For 10.5" GM 14 Bolt Truck In A 5.13 Ratio (Part No.24139)

    High Performance Ring & Pinion "Thick" Gear Set For 10.5" GM 14 Bolt Truck In A 5.13 Ratio

    from

    $509.99
    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 is a thick gear for a 4.10 & down carrier.

    Product Features:
    • Fits GM 10.5″ GM 14 bolt truck
    • 10.50″ ring gear diameter
    • 30 spline pinion
    • 12 ring gear bolts
    • 5.13 ratio
    • Thick gear set for 4.11 and down carrier
    See More

    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

    Most Popular Differential Covers for 1979 GMC C2500s

    Enhance your 1979 GMC C2500 with one of the 4 Differential Covers we have in stock, starting at just $59.99.

    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 – Steel Cover For GM 10.5" 14 Bolt Truck (Part No.32345)

    Steel Cover For GM 10.5" 14 Bolt Truck

    from

    $92.99
    Product Features:
    • Fits GM 10.5″ 14 bolt truck
    • Steel
    See More

    Yukon Gear – Chrome Cover For 9.5" GM (Part No.32018)

    Chrome Cover For 9.5" GM

    from

    $72.99
    Product Features:
    • Fits GM 9.5″
    • Chrome
    See More

    Yukon Gear – Chrome Cover For 10.5" GM 14 Bolt Truck (Part No.32013)

    Chrome Cover For 10.5" GM 14 Bolt Truck

    from

    $59.99
    Chrome cover for GM 14T.

    Product Features:
    • Fits GM 10.5″ 14 bolt truck
    • Chrome
    See More

    Best-Selling 1979 GMC C2500 Differential Oil

    Upgrade your C2500 with one of our 5 best-selling Differential Oil, earning an average 5 stars rating across 2 reviews.

    Valvoline – DEXRON – VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart (Part No.822405)

    DEXRON - VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart

    from

    $14.49
    Valvoline DEXRON-VI/MERCON LV ATF is a full-synthetic transmission fluid formulated with advanced additive technology to meet and exceed the requirements of the General Motors DEXRON-VI specification. It is officially licensed and approved by GM and is fully back-serviceable and can be used wherever DEXRON-II and/or DEXRON-III are recommended. Recommended for use in the following applications: DEXRON-VI, DEXRON-III, DEXRON-II, and Allison C-4.

    Product Features:
    • Formulated with full-synthetic base stocks and advanced additive technology to meet the challenging demands of automatic transmissions
    • Enhanced anti-shudder protection for smooth shifting and maximum power transfer
    • 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
    See More

    Valvoline – DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart (Part No.798153)

    DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart

    from

    $11.99
    Valvoline DEX/MERC ATF is a high-quality transmission fluid formulated to meet the challenging demands of many automatic transmissions. Its responsive low-temperature fluidity is beneficial in both electronic and hydraulic controlled transmissions and transaxles. Recommended for use in the following applications: MERCON*, DEXRON*-III, Ford M2C138-CJ and M2C166-H, Allison C-4 and TES-389, and Caterpillar TO-2.

    Product Features:
    • Formulated with premium base stocks and advanced additive technology to meet the challenging demands of automatic transmissions
    • Enhanced anti-shudder protection for smooth shifting and maximum power transfer
    • 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
    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

    Top-Quality Differential Bearings for 1979 GMC C2500s

    Choose a high-quality OEM or aftermarket Differential Bearing for GMC C2500s and enjoy top-notch performance from $8.49.

    National – Bearing Race (Part No.382A)

    Bearing Race

    from

    $10.99
    Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.

    Product Features:
    • PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
    • SMOOTH ROTATION – Crowned raceways 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

    Driveworks – Tapered Cone Wheel Bearing Assembly (Part No.S-387-AS)

    Tapered Cone Wheel Bearing Assembly

    from

    $18.49
    Value-priced bearing meets all cataloged application requirements.

    Product Features:
    • Brand may vary by location
    See More

    National – Tapered Roller Bearing Cone (Part No.LM501349)

    Tapered Roller Bearing Cone

    from

    $19.99
    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
    See More

    National – Bearing Race (Part No.LM501310)

    Bearing Race

    from

    $8.49
    Product Features:
    • PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
    • SMOOTH ROTATION: Crowned raceways 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 – Standard Open And Gov-Loc Cross Pin Bolt With M10X1.5 Thread For 9.5" And 9.25" GM IFS (Part No.33342)

    Standard Open And Gov-Loc Cross Pin Bolt With M10X1.5 Thread For 9.5" And 9.25" GM IFS

    from

    $23.99
    Product Features:
    • Cross pin bolt
    • Fits GM 9.5″ and 9.25″ IFS
    See More

    FAG US – Cup (Part No.LM501310)

    Cup

    from

    $9.99
    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

    Top Picks for 1979 GMC C2500 Differential Pinion Seals

    Invest in one of our 3 durable Differential Pinion Seals for your 1979 GMC, knowing you’re getting trusted brands and expert craftsmanship.

    Yukon Gear – Pinion Seal For GM 14T (Part No.30023)

    Pinion Seal For GM 14T

    from

    $19.99
    Pinion seal for GM 14T.Yukon Mighty seal.

    Product Features:
    • Pinion seal
    • Fits 1998 and down GM 10.5″ 14 bolt truck
    See More

    FAG US – Shaft Seal (Part No.SS3147)

    Shaft Seal

    from

    $32.49
    Our wheel seals are engineered using only the highest-quality materials to meet vehicle manufacturer specificatons. We work with suppliers to design seals that meet FAG’s quality standards. Seals are designed to protect wheel end components from contamination – such as dirt, dust, and moisture – and prevent the loss of grease over the life of the bearing. The specifications for wheel seals are very demanding, and the type required depends on the specific application, position and vehicle class.

    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

    Yukon Gear – Pinion Seal For 9.5" GM (’79-’97) (Part No.30043)

    Pinion Seal For 9.5" GM ('79-'97)

    from

    $26.99
    Pinion seal for 9.5″ GM (’79-’97).Yukon Mighty seal.

    Product Features:
    • Pinion seal
    • Fits 1997 and down GM 9.5″
    See More

    Top-Rated Rear Differential Cover Gaskets for 1979 GMC C2500s

    Make a smart move for your 1979 GMC C2500 with products all priced from $3.99 to $20.99.

    Mr. Gasket – Differential Gasket (Part No.84B)

    Differential Gasket

    from

    $20.99
    Mr. Gasket Axle Housing/Differential Cover or Rear End Gaskets are manufactured from a .047 inch thick cellulose/nitrile composite gasket material for excellent sealing and durability. They are precision die-cut for an excellent fit. Fits 1964-1970 Chevrolet 8.2 inch 10 bolt & 1970-1981 GM 8.5 inch ring gear

    Product Features:
    • .047″ thick cellulose/nitrile composite gasket material
    • Precision die cut
    • Reusable
    See More

    Felpro – Axle Housing Cover Gasket: Irregular Shaped 14 Bolt Hole Gasket (Part No.RDS 55063)

    Axle Housing Cover Gasket: Irregular Shaped 14 Bolt Hole Gasket

    from

    $8.29
    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 – GM 10.5′ 14 Bolt Truck Cover Gasket (Part No.23016)

    GM 10.5' 14 Bolt Truck Cover Gasket

    from

    $13.99
    14T cover gasket.

    Product Features:
    • Cover gasket
    • Fits GM 10.5″ 14 bolt truck
    See More

    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.743B303)

    Differential Cover Gasket

    from

    $3.99
    Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

    Product Features:
    • All products are designed to meet or exceed OE quality, form, fit and funtion.
    See More

    Top-Rated Differential Brands For Your 1979 GMC C2500

    When it comes to finding the perfect Differential for your 1979 GMC C2500, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 14 trusted brands. We carry the most popular Differential brands including Valvoline, Richmond Gear, and National, and more, all known for their exceptional customer ratings (average brand rating of 4.8 stars) and competitive prices, as low as $10.99. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1979 GMC C2500, providing peace of mind with parts that meet or exceed OEM standards.

    Popular Valvoline 1979 GMC C2500 Differentials

    If you’re looking for a top-quality Differential for your 1979 GMC C2500, 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 $14.49, you’ll find the perfect Differential for your needs and budget. Valvoline Differentials for the 1979 GMC C2500 come highly rated, with over 2 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.
    DEXRON - VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart
    from $14.49
    (2)
    DEXRON – VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart
    “I’ve used this in my 2005 2500HD since I bought the truck with 20k on it now at 280k changed every other year maybe 40k I’d put on in two years, I pu”

    Top-Quality Richmond Gear 1979 GMC C2500 Differentials

    For those in search of a high-quality Differential for their 1979 GMC C2500, Advance Auto Parts offers a great selection of Richmond Gear Differentials. With 1 Richmond Gear 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 $350.99, giving you a range of options to suit your budget. Backed by over 2 customer ratings and an average rating of 4.5 stars, Richmond Gear Differentials provide both reliability and excellent performance. Choosing a Richmond Gear Differential from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
    Differential Ring And Pinion
    from $350.99
    (2)
    Differential Ring And Pinion
    “I have a Chevy Impala 07 that runs on 3 cylinders when not needing the power of 6, and the new plugs have significantly provided an inexpensive tuneup”

    FAQs for 1979 GMC C2500 Differentials

    What are the best-selling Differentials for 1979 GMC C2500s?

    Out of 179 Differentials that fit 1979 GMC C2500s, the following parts are the top sellers:

    What’s the price range for 1979 GMC C2500 Differentials?

    The prices of Differentials for the 1979 GMC C2500 range from $0.91 up to $1,141.99 for the most premium parts.

    What is the average price of a Differential for a 1979 GMC C2500?

    The average price for Differentials for the 1979 GMC C2500 is $220.92. 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 C2500 model years?

    Yes, we carry Differentials for 19 model years of GMC C2500s between 1980 and 2000. The following model years are the most popular for Differential purchases: 2000, 1999, 1998, 1997, 1996, 1995, 1994, 1993, and 1992.

    What are the cheapest Differentials for my 1979 GMC C2500?

    The cheapest 1979 GMC C2500 Differentials we carry are:

    Does Advance Auto Parts sell Differentials for any other 1979 GMC models?

    Yes. We stock Differentials for 12 other popular 1979 GMC models. Some of the most popular are 1979 Jimmy Differentials, 1979 K2500 Differentials, 1979 K1500 Differentials, 1979 C1500 Differentials, and 1979 K3500 Differentials.

    What types of Differentials do you sell for my 1979 GMC C2500?

    As of 11/2/25, these are some of the most in-demand types of Differentials for a 1979 GMC C2500:

    Can I get help with 1979 GMC C2500 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 C2500 Differentials?

    Advance Auto Parts keeps returns simple. For new GMC C2500 Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.