1991 GMC K2500 Differentials

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Keep Your 1991 GMC K2500 in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1991 GMC K2500 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Rear Housing Cover Gaskets, Differential Covers, and Differential Oil. 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 $3.99 with an average 4.1 star rating. National and Dorman offer similar pricing and quality, backed by strong customer feedback. With over 1,596 reviews and a solid 4.0 star average, you can shop with confidence knowing other GMC K2500 owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1991 GMC K2500 Differential at Advance Auto Parts is around $242.89, with a range that starts at $2.99 and goes up to $1,141.99. With 298 options in stock from 16 trusted brands, finding the right fit is easy. Popular picks like Felpro Axle Housing Cover Gasket: Irregular Shaped 14 Bolt Hole Gasket, RDS 55063, Felpro Axle Housing Cover Gasket: Irregular Shaped 14 Bolt Hole Gasket, RDS 55387, and Motive Gear Ring Gear Bolt, 14066913 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 1991 GMC K2500 in peak condition, inside and out.

Essential 1991 GMC K2500 Differentials

Yukon Gear – "Yukon Gear 10.5"" GM 14 Bolt Truck Pinion Nut, 33148" (Part No.33148)

"Yukon Gear 10.5"" GM 14 Bolt Truck Pinion Nut, 33148"

from

$48.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.
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Yukon Gear – Yukon Gear Bearing Install Kit for Dana 44 Differential (Straight Axle), 11020 (Part No.11020)

Yukon Gear Bearing Install Kit for Dana 44 Differential (Straight Axle), 11020

from

$329.99
Yukon Bearing Installation Kits are perfect for shops and 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. Yukon does extensive research for each application to make sure your kit will arrive with all the correct parts you need to properly install your ring and pinion gear set.
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Yukon Gear – Yukon Gear Dura Grip For Dana 44, 30 Spline, 3.73 & Down, 26026 (Part No.26026)

Yukon Gear Dura Grip For Dana 44, 30 Spline, 3.73 & Down, 26026

from

$869.99
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.
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USA Standard Gear – USA Standard Gear Differential Rebuild Kit, 37061 (Part No.37061)

USA Standard Gear Differential Rebuild Kit, 37061

from

$594.99
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.
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Pro-King – Pro-King Differential Cover Gasket, 743B303 (Part No.743B303)

Pro-King Differential Cover Gasket, 743B303

from

$3.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
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Yukon Gear – "Yukon Gear Chrome Moly Cross Pin Shaft for Mini-Spool for 8.5"" GM, 32238" (Part No.32238)

"Yukon Gear Chrome Moly Cross Pin Shaft for Mini-Spool for 8.5"" GM, 32238"

from

$61.99
Yukon Gear & Axle manufactures a full line of top-quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers, and other general maintenance items. You can count on Yukon to fulfill all your differential small parts needs.
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Yukon Gear – "Yukon Gear Adjuster Lock Bolt for Left Hand Case Half Of 7.2"" and 9.25"" GM IFS, 33244" (Part No.33244)

"Yukon Gear Adjuster Lock Bolt for Left Hand Case Half Of 7.2"" and 9.25"" GM IFS, 33244"

from

$32.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.
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Yukon Gear – Yukon Gear Zip Locker Front Switch Cover, 34009 (Part No.34009)

Yukon Gear Zip Locker Front Switch Cover, 34009

from

$7.99
The Yukon Zip Locker is the latest in on-demand traction. Its air-operated design allows you to switch from an open differential to 100% lockup when you need it, giving you the ultimate in driver select ability.
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Yukon Gear – Yukon Gear Power Lok Belleville Clutch Plate, Splined, 16174 (Part No.16174)

Yukon Gear Power Lok Belleville Clutch Plate, Splined, 16174

from

$36.99
Yukon Gear & Axle manufactures a full line of top-quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers, and other general maintenance items. You can count on Yukon to fulfill all your differential small parts needs.
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National – National Bearing Race, 382A (Part No.382A)

National Bearing Race, 382A

from

$13.99
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.
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Motive Gear – Motive Gear Differential Pinion Shim Kit, GM14SK (Part No.GM14SK)

Motive Gear Differential Pinion Shim Kit, GM14SK

from

$22.99
Motive Gear Differential Pinion Shim Kit, GM14SK.
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Yukon Gear – "Yukon Gear 10.5"" GM 14 Bolt Truck Ring Gear Bolt, 33050" (Part No.33050)

"Yukon Gear 10.5"" GM 14 Bolt Truck Ring Gear Bolt, 33050"

from

$11.99
“10.5”” GM 14 bolt truck ring gear bolt 4.56 & up. 9/16″” x 18. 2.522″” overall length.”
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Motive Gear – Motive Gear Differential Internal Carrier Gear Kit, GM10BI-30 (Part No.GM10BI-30)

Motive Gear Differential Internal Carrier Gear Kit, GM10BI-30

from

$123.99
Motive Gear Differential Internal Carrier Gear Kit, GM10BI-30.
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Yukon Gear – "Yukon Gear Dura Grip Spider Gear Set for GM 10.5""/14T Differential, 16167" (Part No.16167)

"Yukon Gear Dura Grip Spider Gear Set for GM 10.5""/14T Differential, 16167"

from

$659.99
Yukon Gear & Axle spider gear kits utilize the highest quality materials and best production techniques in the industry to ensure a longer lasting spider gear set. Kit delivers everything needed for a complete and proper spider gear set replacement.
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USA Standard Gear – USA Standard Gear Ring/Pinion Sets, 36342 (Part No.36342)

USA Standard Gear Ring/Pinion Sets, 36342

from

$426.99
USA Standard Gear Ring/Pinion Sets, 36342.
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Yukon Gear – Yukon Gear Set Up Bearing, 56037 (Part No.56037)

Yukon Gear Set Up Bearing, 56037

from

$189.99
Set-up carrier bearing (2 bearings, no races) 25590. No return.
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Yukon Gear – "Yukon Gear Left Hand Adjuster Lock Nut for 9.25"" GM, 33354" (Part No.33354)

"Yukon Gear Left Hand Adjuster Lock Nut for 9.25"" GM, 33354"

from

$26.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.
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Motive Gear – Motive Gear Differential Gear Install Kit, GM10.5IK (Part No.GM10.5IK)

Motive Gear Differential Gear Install Kit, GM10.5IK

from

$54.99
Motive Gear Differential Gear Install Kit, GM10.5IK.
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Motive Gear – Motive Gear Differential Crush Sleeve, 1114 (Part No.1114)

Motive Gear Differential Crush Sleeve, 1114

from

$6.99
Motive Gear Differential Crush Sleeve, 1114.
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Felpro – Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6629 (Part No.RDS 6629)

Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6629

from

$7.99
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.
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Driveworks – Driveworks Cylindrical Bearing, S-R1561TV (Part No.S-R1561TV)

Driveworks Cylindrical Bearing, S-R1561TV

from

$32.49
Value-priced bearing meets all cataloged application requirements.
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Valvoline – Valvoline Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid 1 GA, 904891 (Part No.904891)

Valvoline Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid 1 GA, 904891

from

$35.99
Choosing an automatic transmission fluid just got easier. Valvoline Full Synthetic MaxLife Multi-Vehicle ATF, the #1 ATF product, is suitable for use in 95% of ATF vehicles in operation with US registered light duty applications. And now, it€™s also recommended for most belt and chain-driven continuously variable transmissions (CVT). Featuring advanced additives to prevent the major causes of transmission breakdown, it€™s designed to help prevent leaks, reduce wear and tear, and maximize performance €“ all for much longer than conventional fluids. It has improved thermal stability for longer fluid life, better viscosity stability for consistent transmission operation, and frictional enhancements for smooth gear engagements. Whether your vehicle has a CVT or traditional automatic, Valvoline MaxLife Multi-Vehicle ATF is suitable for a broad range of transmissions including Ford, GM, Toyota, Honda, Nissan, Hyundai, Subaru, BMW, Mercedes, Volvo, VW and Audi vehicles. It€™s specifically recommended for use in the following applications: GM DEXRON-II, DEXRON-III, DEXRON-VI, and DEX-CVT; Ford MERCON LV; Toyota/Lexus Type T, T-II, T-IV, WS, CVTF FE, and CVTF TC. For the many miles ahead, trust your transmission with Valvoline, the #1 automatic transmission fluid brand.
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Yukon Gear – Yukon Gear Dana 44 Standard Open Spider Gear Kit Replacement, 16077 (Part No.16077)

Yukon Gear Dana 44 Standard Open Spider Gear Kit Replacement, 16077

from

$218.99
Yukon Gear & Axle spider gear kits feature higher quality materials and better manufacturing techniques than OEM to ensure a longer lasting spider gear set. Kit delivers everything needed for a complete and proper spider gear set replacement.
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Yukon Gear – "Yukon Gear Pinion Install Kit for ’97 & Down GM 9.5"" Differential., 13075" (Part No.13075)

"Yukon Gear Pinion Install Kit for '97 & Down GM 9.5"" Differential., 13075"

from

$319.99
Yukon Pinion Installation Kits are a terrific solution for gear installation on lower mileage vehicles where the carrier bearings and races can be reused. This kit features Timken bearings and races along with high-quality seals and small parts. Yukon does extensive research for each application to make sure your kit will arrive with all the correct parts you need to install your gear set.
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Yukon Gear – "Yukon Gear 14T GM Pinion Support Bolt, 7/16-14"" Long, 33582" (Part No.33582)

"Yukon Gear 14T GM Pinion Support Bolt, 7/16-14"" Long, 33582"

from

$5.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.
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aFe POWER – aFe POWER Differential Cover, 46-70370 (Part No.46-70370)

aFe POWER Differential Cover, 46-70370

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 A356-T6 cast aluminum with reinforcing ribs for maximum strength. Mounting hardware is included for a hassle-free installation. A calibration plug set to the factory level prevents overfilling of the differential. A magnetic drain plug and a deep reach magnetic fill plug are provided for maximum protection. This cover has a raw finish with machined fins for a distinctive look. 4 Quart Gear Oil Capacity: This cover has about a 4 quart gear oil capacity at the factory fill level, factory cover holds about 3 quarts. Built-in External Fins: Built-in external fins transfer heat from the fluid to the outside air for maximum cooling. Magnetic Drain/Fill Plug: This system incorporates a magnetic drain and deep reach fill plug that captures loose particles for maximum rear-end protection. Oil Level calibration plug: A 1/8″” NPT calibration plug is set to the factory fluid level which eliminates accidental overfilling. When it comes to engineering for power, performance, protection and value, aFe Power is the only choice.”
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Yukon Gear – "Yukon Gear Bearing Race Driver for Ford 9"", GM 10.5"", & Chrysler 11.5"" Differentials, 56019" (Part No.56019)

"Yukon Gear Bearing Race Driver for Ford 9"", GM 10.5"", & Chrysler 11.5"" Differentials, 56019"

from

$219.99
Yukon Gear & Axle offers a full line of top quality differential tools to save time and money.
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Yukon Gear – Yukon Gear Dana 44 Pinion Gear Thrust Washer, 33281 (Part No.33281)

Yukon Gear Dana 44 Pinion Gear Thrust Washer, 33281

from

$4.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.
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Most Popular Rear Housing Cover Gaskets for 1991 GMC K2500s

Enhance your 1991 GMC K2500 with one of the 2 Rear Housing Cover Gaskets we have in stock, starting at just $7.99.

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

Felpro Axle Housing Cover Gasket: Irregular Shaped 14 Bolt Hole Gasket, RDS 55063

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.
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Victor Reinz – Victor Reinz Axle Housing Cover Gasket, 71-14834-00 (Part No.71-14834-00)

Victor Reinz Axle Housing Cover Gasket, 71-14834-00

from

$7.99
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.
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Best-Selling 1991 GMC K2500 Differential Covers

Upgrade your K2500 with one of our 9 best-selling Differential Covers, earning an average 4.75 stars rating across 26 reviews.

Dorman – Dorman Differential Cover, 697-711 (Part No.697-711)

Dorman Differential Cover, 697-711

from

$63.99
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.
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Dorman – Dorman Differential Cover, 697-703 (Part No.697-703)

Dorman Differential Cover, 697-703

from

$46.99
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.
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Yukon Gear – "Yukon Gear Steel Cover for GM 9.5"", Threaded for Fill Plug, Plug Not Included, 32333" (Part No.32333)

"Yukon Gear Steel Cover for GM 9.5"", Threaded for Fill Plug, Plug Not Included, 32333"

from

$93.99
These Yukon replacement diff covers are a direct bolt-on.
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Yukon Gear – "Yukon Gear Steel Cover for GM 10.5"" 14 Bolt Truck, 32345" (Part No.32345)

"Yukon Gear Steel Cover for GM 10.5"" 14 Bolt Truck, 32345"

from

$92.99
These Yukon replacement diff covers are a direct bolt-on.
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Yukon Gear – "Yukon Gear Chrome Cover for 9.5"" GM, 32018" (Part No.32018)

"Yukon Gear Chrome Cover for 9.5"" GM, 32018"

from

$72.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design finished in chrome.
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Yukon Gear – "Yukon Gear Chrome Cover for 10.5"" GM 14 Bolt Truck, 32013" (Part No.32013)

"Yukon Gear Chrome Cover for 10.5"" GM 14 Bolt Truck, 32013"

from

$59.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design finished in chrome.
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ATP – ATP Differential Cover Kit With Internal Magnet, 111104 (Part No.111104)

ATP Differential Cover Kit With Internal Magnet, 111104

from

$40.99
Differential covers can become damaged from road debris, corrosion, or bolt/drain plug over tightening. Their job is to act as a lid keeping lubricants in place for the ring and pinion gears, bearings, and bushings. Without lubricants, the differential quickly become damaged. ATP Differential Cover Kits include a replacement gasket and are designed to fit and function just like the original part ensuring long life and durability.
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B & M – "B & M Cast Aluminum Differential Cover For Gm 9.5"" 14 Bolt, 70505" (Part No.70505)

"B & M Cast Aluminum Differential Cover For Gm 9.5"" 14 Bolt, 70505"

from

$399.99
Our engineers designed the line of Hi-Tek differential covers to not only look good but address a number of weaknesses of the factory stamped steel covers. First, they started by constructing the covers of thick A356.0-T6 aluminum, which dissipates heat much faster than the factory steel unit keeping the fluid temperature lower under high-stress loads vs. a steel cover. Then for added durability, we added a reinforced center bar for extra strength along with load bolts to help prevent bearing cap deflection under severe loads. The internal shape of the cover retains the smooth round back internally to help keep the fluid flow going over the ring gear to properly lubricate the gears and bearings. Additional features include a magnetic drain plug for catching ferrous metal particles, machined B&M logo and all necessary hardware and easy to follow detailed instructions for a quick and simple installation you can do at home. Note: Gasket not included.
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B & M – "B & M Cast Aluminum Differential Cover For Gm 10.5"" 14 Bolt, 70501" (Part No.70501)

"B & M Cast Aluminum Differential Cover For Gm 10.5"" 14 Bolt, 70501"

from

$385.99
Our engineers designed the line of Hi-Tek differential covers to not only look good but address a number of weaknesses of the factory stamped steel covers. First, they started by constructing the covers of thick A356.0-T6 aluminum, which dissipates heat much faster than the factory steel unit keeping the fluid temperature lower under high-stress loads vs. a steel cover. Then for added durability, we added a reinforced center bar for extra strength along with load bolts to help prevent bearing cap deflection under severe loads. The internal shape of the cover retains the smooth round back internally to help keep the fluid flow going over the ring gear to properly lubricate the gears and bearings. Additional features include a magnetic drain plug for catching ferrous metal particles, machined B&M logo and all necessary hardware and easy to follow detailed instructions for a quick and simple installation you can do at home. Note: Does Not Include Gasket
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Top-Quality Differential Oil for 1991 GMC K2500s

Choose a high-quality OEM or aftermarket Differential Oil for GMC K2500s and enjoy top-notch performance from $35.99.

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

Yukon Gear 3 Qt - Penzoil 80W90 Conventional Gear Oil, 15002

from

$44.99
Union 76 gear oil is a conventional non-synthetic 80W90 formulation designed for all types of differentials.
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Yukon Gear – "Yukon Gear Redline Synthetic ""Shock Proof"" Oil – 4 Quarts, 15004" (Part No.15004)

"Yukon Gear Redline Synthetic ""Shock Proof"" Oil - 4 Quarts, 15004"

from

$137.99
Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection.
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Valvoline – Valvoline Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid 1 GA, 904891 (Part No.904891)

Valvoline Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid 1 GA, 904891

from

$35.99
Choosing an automatic transmission fluid just got easier. Valvoline Full Synthetic MaxLife Multi-Vehicle ATF, the #1 ATF product, is suitable for use in 95% of ATF vehicles in operation with US registered light duty applications. And now, it€™s also recommended for most belt and chain-driven continuously variable transmissions (CVT). Featuring advanced additives to prevent the major causes of transmission breakdown, it€™s designed to help prevent leaks, reduce wear and tear, and maximize performance €“ all for much longer than conventional fluids. It has improved thermal stability for longer fluid life, better viscosity stability for consistent transmission operation, and frictional enhancements for smooth gear engagements. Whether your vehicle has a CVT or traditional automatic, Valvoline MaxLife Multi-Vehicle ATF is suitable for a broad range of transmissions including Ford, GM, Toyota, Honda, Nissan, Hyundai, Subaru, BMW, Mercedes, Volvo, VW and Audi vehicles. It€™s specifically recommended for use in the following applications: GM DEXRON-II, DEXRON-III, DEXRON-VI, and DEX-CVT; Ford MERCON LV; Toyota/Lexus Type T, T-II, T-IV, WS, CVTF FE, and CVTF TC. For the many miles ahead, trust your transmission with Valvoline, the #1 automatic transmission fluid brand.
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Top Picks for 1991 GMC K2500 Differential Bearings

Invest in one of our 4 durable Differential Bearings for your 1991 GMC, knowing you’re getting trusted brands and expert craftsmanship.

National – National Bearing Race, 382A (Part No.382A)

National Bearing Race, 382A

from

$13.99
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.
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Driveworks – Driveworks Wheel Bearing Kit, S-RA-321 (Part No.S-RA-321)

Driveworks Wheel Bearing Kit, S-RA-321

from

$141.99
Driveworks Wheel Bearing Kit, S-RA-321.
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Driveworks – Driveworks Tapered Roller Bearing, S-HM-804846 (Part No.S-HM-804846)

Driveworks Tapered Roller Bearing, S-HM-804846

from

$41.99
Driveworks Tapered Roller Bearing, S-HM-804846.
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Driveworks – Driveworks Tapered Roller Bearing, S-HM-903249 (Part No.S-HM-903249)

Driveworks Tapered Roller Bearing, S-HM-903249

from

$27.99
Driveworks Tapered Roller Bearing, S-HM-903249.
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Top-Rated Rear Differential Cover Gaskets for 1991 GMC K2500s

Make a smart move for your 1991 GMC K2500 with products all priced from $3.99 to $13.99.

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

Felpro Axle Housing Cover Gasket: Irregular Shaped 14 Bolt Hole Gasket, RDS 55387

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.
See More

Yukon Gear – Yukon Gear GM 10.5′ 14 Bolt Truck Cover Gasket, 23016 (Part No.23016)

Yukon Gear GM 10.5' 14 Bolt Truck Cover Gasket, 23016

from

$13.99
14T cover gasket. EXTERNAL SUPPLY>FDO>BACK ROOM-FDO>APPLICATION SPECIFIC from Yukon Gear
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Yukon Gear – "Yukon Gear 9.5"" GM Cover Gasket, 23023" (Part No.23023)

"Yukon Gear 9.5"" GM Cover Gasket, 23023"

from

$13.99
“9.5”” GM cover gasket. EXTERNAL SUPPLY>FDO>BACK ROOM-FDO>APPLICATION SPECIFIC from Yukon Gear”
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Pro-King – Pro-King Differential Cover Gasket, 743B303 (Part No.743B303)

Pro-King Differential Cover Gasket, 743B303

from

$3.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
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Top-Rated Differential Brands For Your 1991 GMC K2500

When it comes to finding the perfect Differential for your 1991 GMC K2500, 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 $3.99. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1991 GMC K2500, providing peace of mind with parts that meet or exceed OEM standards.

Popular National 1991 GMC K2500 Differentials

If you’re looking for a top-quality Differential for your 1991 GMC K2500, 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 $18.99, you’ll find the perfect Differential for your needs and budget. National Differentials for the 1991 GMC K2500 come highly rated, with over 9 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.
National Bearing Race, LM501314
from $11.99
(2)
National Bearing Race, LM501314
“good quality & price”
National Shaft Repair Sleeve, 99138
from $30.99
(1)
National Shaft Repair Sleeve, 99138
“Perfect Fit. Product was exactly as described”
National Bearing Race, 382A
from $13.99
(6)
National Bearing Race, 382A
“Fit perfectly. No difficulty replacing my old ones.”

Top-Quality Dorman 1991 GMC K2500 Differentials

For those in search of a high-quality Differential for their 1991 GMC K2500, 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 $39.26, giving you a range of options to suit your budget. Backed by over 37 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.
Dorman Differential Cover, 697-703
from $46.99
(15)
Dorman Differential Cover, 697-703
“Look great but it was the wrong one”
Dorman Differential Cover, 697-711
from $63.99
(11)
Dorman Differential Cover, 697-711
“Good quality cover, nice coat of paint on it. Should outlast the truck.”

FAQs for 1991 GMC K2500 Differentials

What are the best-selling Differentials for 1991 GMC K2500s?

Out of 298 Differentials that fit 1991 GMC K2500s, the following parts are the top sellers:

What’s the price range for 1991 GMC K2500 Differentials?

The prices of Differentials for the 1991 GMC K2500 range from $2.99 up to $1,141.99 for the most premium parts.

What is the average price of a Differential for a 1991 GMC K2500?

The average price for Differentials for the 1991 GMC K2500 is $242.89. 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 K2500 model years?

Yes, we carry Differentials for 18 model years of GMC K2500s between 1979 and 1999. The following model years are the most popular for Differential purchases: 1999, 1998, 1997, 1996, 1995, 1994, 1993, 1992, and 1990.

What are the cheapest Differentials for my 1991 GMC K2500?

The cheapest 1991 GMC K2500 Differentials we carry are:

Does Advance Auto Parts sell Differentials for any other 1991 GMC models?

Yes. We stock Differentials for 23 other popular 1991 GMC models. Some of the most popular are 1991 Jimmy Differentials, 1991 C2500 Differentials, 1991 K1500 Differentials, 1991 C1500 Differentials, and 1991 Sonoma Differentials.

What are the top-rated Differentials that fit the 1991 GMC K2500?

The one 1991 GMC K2500 Differential we have in stock is the Motive Gear Ring Gear Bolt, 14066913. It costs $2.99.

What types of Differentials do you sell for my 1991 GMC K2500?

As of 8/2/26, these are some of the most in-demand types of Differentials for a 1991 GMC K2500:

Can I get help with 1991 GMC K2500 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 K2500 Differentials?

Advance Auto Parts keeps returns simple. For new GMC K2500 Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.