1985 GMC K1500 Differentials

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Keep Your 1985 GMC K1500 in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1985 GMC K1500 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Rear Differential Cover Gaskets, Differential Pinion Seals, 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 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 1,515 reviews and a solid 4.2 star average, you can shop with confidence knowing other GMC K1500 owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1985 GMC K1500 Differential at Advance Auto Parts is around $211.62, with a range that starts at $2.59 and goes up to $1,350.00. With 258 options in stock from 17 trusted brands, finding the right fit is easy. Popular picks like Dorman – Help Differential Shaft Lock Bolt, 81048, Yukon Gear 3 Qt – Penzoil 80W90 Conventional Gear Oil, 15002, 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 1985 GMC K1500 in peak condition, inside and out.

Essential 1985 GMC K1500 Differentials

Motive Gear – Motive Gear Differential Master Bearing Kit – Koyo, R9.5GRLMK (Part No.R9.5GRLMK)

Motive Gear Differential Master Bearing Kit - Koyo, R9.5GRLMK

from

$187.99
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
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Yukon Gear – Yukon Gear 1541H Alloy 6 Lug Rear Axle for ’70-’81 GM 12T 4WD, 21256 (Part No.21256)

Yukon Gear 1541H Alloy 6 Lug Rear Axle for '70-'81 GM 12T 4WD, 21256

from

$284.99
Yukon Gear & Axle offers an extensive line of general replacement and high-performance axles for passenger car, truck and SUV applications. High quality alloys and the latest in heat-treating technologies provide a stronger-than-stock axle for off-road, on the street, or at the track.
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Pro-King – Pro-King Differential Cross Shaft, 742G673 (Part No.742G673)

Pro-King Differential Cross Shaft, 742G673

from

$28.49
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
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Pro-King – Pro-King Differential Pinion Gear Washer, 742G216 (Part No.742G216)

Pro-King Differential Pinion Gear Washer, 742G216

from

$2.59
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
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Yukon Gear – Yukon Gear Super Carrier Shim Kit for GM 9.5, 55003 (Part No.55003)

Yukon Gear Super Carrier Shim Kit for GM 9.5, 55003

from

$29.99
Yukon shim kits are precision machined and tailored for each individual application to ensure you have the right shims for every set up.
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Yukon Gear – Yukon Gear Standard Open Spider Gear Kit, GM 12 Bolt Car and Truck with 30 Spline Axles, 16043 (Part No.16043)

Yukon Gear Standard Open Spider Gear Kit, GM 12 Bolt Car and Truck with 30 Spline Axles, 16043

from

$207.99
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 Bearing Race Driver for Popular Ford, Gm, Amc, Chrysler, and Dana Diffs, 56020 (Part No.56020)

Yukon Gear Bearing Race Driver for Popular Ford, Gm, Amc, Chrysler, and Dana Diffs, 56020

from

$215.99
Yukon Gear & Axle offers a full line of top quality differential tools to save time and money.
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Spicer – Spicer Differential End Yoke, 2-4-8091X (Part No.2-4-8091X)

Spicer Differential End Yoke, 2-4-8091X

from

$104.99
Demand genuine Spicer. Dana design, engineering, testing and manufacturing processes all work in conjunction with one another to ensure unparalleled performance that non-genuine parts simply cannot deliver.
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Motive Gear – Motive Gear Differential Gear Install Kit, GM9.5IK (Part No.GM9.5IK)

Motive Gear Differential Gear Install Kit, GM9.5IK

from

$58.99
Motive Gear Differential Gear Install Kit, GM9.5IK.
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Yukon Gear – Yukon Gear Pinion Nut washer, 33166 (Part No.33166)

Yukon Gear Pinion Nut washer, 33166

from

$23.99
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 Super Carrier Shim Kit for Ford 7.5"", GM 7.5"", 8.2"" & 8.5, 55001" (Part No.55001)

"Yukon Gear Super Carrier Shim Kit for Ford 7.5"", GM 7.5"", 8.2"" & 8.5, 55001"

from

$59.99
Yukon shim kits are precision machined and tailored for each individual application to ensure you have the right shims for every set up.
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USA Standard Gear – USA Standard Gear Differential Open Unit/Component, 59021 (Part No.59021)

USA Standard Gear Differential Open Unit/Component, 59021

from

$149.99
“Replacement front spindle for Dana 44, Ford F150, 5 hole (approx. 6″” OD).”
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Yukon Gear – "Yukon Gear GM 9.5"" Ring Gear Bolt, 33047" (Part No.33047)

"Yukon Gear GM 9.5"" Ring Gear Bolt, 33047"

from

$12.99
“GM 9.5″” ring gear bolt. 12mm x 1.5. EXTERNAL SUPPLY>FDO>BACK ROOM-FDO>APPLICATION SPECIFIC from Yukon Gear”
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National – National Shaft Repair Sleeve, 99155 (Part No.99155)

National Shaft Repair Sleeve, 99155

from

$39.49
National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.
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Yukon Gear – "Yukon Gear Dana 44, Ford 8"" / 9"", and Model 20 Side Gear Thrust Washer Replacement, 33283" (Part No.33283)

"Yukon Gear Dana 44, Ford 8"" / 9"", and Model 20 Side Gear Thrust Washer Replacement, 33283"

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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Mr. Gasket – Mr. Gasket Differential Cover Kit, 9895 (Part No.9895)

Mr. Gasket Differential Cover Kit, 9895

from

$88.69
The Mr. Gasket chrome plated rear end cover is made from heavy-gauge steel, and comes complete with bolts and gaskets.
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Yukon Gear – Yukon Gear Zip Locker Bulkhead Fitting, 34001 (Part No.34001)

Yukon Gear Zip Locker Bulkhead Fitting, 34001

from

$27.99
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 Pinion Install Kit for ’98 & Up GM 9.5"" Differential, 13076" (Part No.13076)

"Yukon Gear Pinion Install Kit for '98 & Up GM 9.5"" Differential, 13076"

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 Crush Sleeve, 33099 (Part No.33099)

Yukon Gear Crush Sleeve, 33099

from

$13.99
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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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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Pro-King – Pro-King Differential Cover Plug, 742G484 (Part No.742G484)

Pro-King Differential Cover Plug, 742G484

from

$6.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
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Yukon Gear – "Yukon Gear Positraction Internals for 9.5"" GM with 33 Spline Axles, 16057" (Part No.16057)

"Yukon Gear Positraction Internals for 9.5"" GM with 33 Spline Axles, 16057"

from

$606.99
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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Dorman – Dorman 4 Wheel Drive Oil Seal, 600-606 (Part No.600-606)

Dorman 4 Wheel Drive Oil Seal, 600-606

from

$40.49
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.
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National – National Tapered Roller Bearing Cone, HM88649 (Part No.HM88649)

National Tapered Roller Bearing Cone, HM88649

from

$20.79
Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.
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Yukon Gear – Yukon Gear Replacement Standard Open Carrier Case For Dana 44, 3.92 & Up, 20028 (Part No.20028)

Yukon Gear Replacement Standard Open Carrier Case For Dana 44, 3.92 & Up, 20028

from

$149.99
“Yukon replacement standard open carrier case for Dana 44, 3.92 & up, 2-3/8″” tall.”
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Yukon Gear – "Yukon Gear Ltd. Slip Clutch Guide, Chry 9.25/Dana 44/50/GM 12 Bolt/8.2""/8.5""/8.6""/Nis M226, 33352" (Part No.33352)

"Yukon Gear Ltd. Slip Clutch Guide, Chry 9.25/Dana 44/50/GM 12 Bolt/8.2""/8.5""/8.6""/Nis M226, 33352"

from

$8.99
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 Pinion Nut, 33152 (Part No.33152)

Yukon Gear Pinion Nut, 33152

from

$9.99
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 Replacement Cross Pin Shaft for Dana 44, Standard Open, 33318 (Part No.33318)

Yukon Gear Replacement Cross Pin Shaft for Dana 44, Standard Open, 33318

from

$16.99
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 Differential Cover Gaskets for 1985 GMC K1500s

Enhance your 1985 GMC K1500 with one of the 3 Rear Differential Cover Gaskets we have in stock, starting at just $3.99.

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

Felpro Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket, RDS 55028-1

from

$11.99
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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Pro-King – Pro-King Differential Cover Gasket, 742G303A (Part No.742G303A)

Pro-King Differential Cover Gasket, 742G303A

from

$32.49
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
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Pro-King – Pro-King Differential Cover Gasket, 742G303 (Part No.742G303)

Pro-King Differential Cover Gasket, 742G303

from

$3.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
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Best-Selling 1985 GMC K1500 Differential Pinion Seals

Upgrade your K1500 with one of our 6 best-selling Differential Pinion Seals, earning an average 4.83 stars rating across 22 reviews.

Driveworks – Driveworks Oil Seal, S-2043 (Part No.S-2043)

Driveworks Oil Seal, S-2043

from

$10.79
Value-priced seal meets all cataloged application requirements.
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Motive Gear – Motive Gear Differential Pinion Seal, 2043 (Part No.2043)

Motive Gear Differential Pinion Seal, 2043

from

$3.99
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, 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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National – National Multi-Purpose Seal, 8622 (Part No.8622)

National Multi-Purpose Seal, 8622

from

$22.79
National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.
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Yukon Gear – "Yukon Gear 8.5"" GM 4WD front pinion seal, 30195" (Part No.30195)

"Yukon Gear 8.5"" GM 4WD front pinion seal, 30195"

from

$13.99
Yukon Mighty Seals use the latest design and manufacturing technologies to produce a precision fit that seals tight and lasts for years to come.
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Schaeffler – Schaeffler Shaft Seal, SS2987 (Part No.SS2987)

Schaeffler Shaft Seal, SS2987

from

$16.99
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.
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Schaeffler – Schaeffler Shaft Seal, SS2983 (Part No.SS2983)

Schaeffler Shaft Seal, SS2983

from

$9.99
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.
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Top-Quality Differential Bearings for 1985 GMC K1500s

Choose a high-quality OEM or aftermarket Differential Bearing for GMC K1500s and enjoy top-notch performance from $7.99.

National – National Tapered Roller Bearing Cone, LM104949 (Part No.LM104949)

National Tapered Roller Bearing Cone, LM104949

from

$24.29
Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers 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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Yukon Gear – Yukon Gear Positraction Cross Pin Bolt for GM 12 Bolt Car and Truck, 33344 (Part No.33344)

Yukon Gear Positraction Cross Pin Bolt for GM 12 Bolt Car and Truck, 33344

from

$28.99
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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Schaeffler – Schaeffler Bearing – TRB (Tapered Roller Bearing), KT45 (Part No.KT45)

Schaeffler Bearing - TRB (Tapered Roller Bearing), KT45

from

$21.99
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.
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Driveworks – Driveworks Tapered Roller Bearing, S-LM-102911 (Part No.S-LM-102911)

Driveworks Tapered Roller Bearing, S-LM-102911

from

$13.49
Driveworks Tapered Roller Bearing, S-LM-102911.
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Yukon Gear – "Yukon Gear GM 55, 8.2"", 12P, and 12T Standard Open Cross Pin Bolt, 33068" (Part No.33068)

"Yukon Gear GM 55, 8.2"", 12P, and 12T Standard Open Cross Pin Bolt, 33068"

from

$7.99
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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Top Picks for 1985 GMC K1500 Differential Oil

Invest in one of our 3 durable Differential Oil for your 1985 GMC, knowing you’re getting trusted brands and expert craftsmanship.

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-Rated Differential Covers for 1985 GMC K1500s

Make a smart move for your 1985 GMC K1500 with products all priced from $35.99 to $334.99.

Dorman – Dorman Differential Cover, 697-700 (Part No.697-700)

Dorman Differential Cover, 697-700

from

$37.99
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 Chrome Cover for 8.6"", 8.5"" and 8.2"" GM Rear, 32017" (Part No.32017)

"Yukon Gear Chrome Cover for 8.6"", 8.5"" and 8.2"" GM Rear, 32017"

from

$74.99
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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Spectre – Spectre W3 Differential Cover 10 Bolt, 60703 (Part No.60703)

Spectre W3 Differential Cover 10 Bolt, 60703

from

$42.99
Spectre Differential Covers are made to OEM specifications and are triple chrome plated for a lasting shine. Designed to protect the intricate moving parts of the differential, Spectre’s covers add an extra layer of protection to the vehicle’s underside. Featuring a 10-bolt design and including the necessary chrome bolts and gaskets, this differential cover is designed to fit 1964-1972 Chevy/GM intermediates, 1983-1987 Chevy/GMC 1/2 Ton two or four wheel drive rear, and 1967-1972 Chevy Camaros. Includes 10 SAE standard chrome bolts for installation. You’ll need to supply your own bolts if your application requires metric bolts.
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Yukon Gear – "Yukon Gear Chrome Cover for 8.5"" GM Front, 32016" (Part No.32016)

"Yukon Gear Chrome Cover for 8.5"" GM Front, 32016"

from

$44.99
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 Polished Aluminum Cover for 8.6"", 8.2"" and 8.5"" GM Rear, 32030" (Part No.32030)

"Yukon Gear Polished Aluminum Cover for 8.6"", 8.2"" and 8.5"" GM Rear, 32030"

from

$255.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design made from aluminum and polished to perfection.
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Yukon Gear – "Yukon Gear Steel Cover for GM 8.2"" & 8.5"" Rear, 32332" (Part No.32332)

"Yukon Gear Steel Cover for GM 8.2"" & 8.5"" Rear, 32332"

from

$123.99
These Yukon replacement diff covers are a direct bolt-on.
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Yukon Gear – Yukon Gear Chrome Cover for GM 12 Bolt Truck, 32012 (Part No.32012)

Yukon Gear Chrome Cover for GM 12 Bolt Truck, 32012

from

$64.99
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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B & M – "B & M Cast Aluminum Differential Cover For Gm 8.875"" 12 Bolt Truck, 70504" (Part No.70504)

"B & M Cast Aluminum Differential Cover For Gm 8.875"" 12 Bolt Truck, 70504"

from

$334.99
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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Yukon Gear – "Yukon Gear Polished Aluminum Cover for 8.5"" GM, 32029" (Part No.32029)

"Yukon Gear Polished Aluminum Cover for 8.5"" GM, 32029"

from

$296.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design made from aluminum and polished to perfection.
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Yukon Gear – Yukon Gear Polished Aluminum Cover for GM 12 Bolt Truck, 32027 (Part No.32027)

Yukon Gear Polished Aluminum Cover for GM 12 Bolt Truck, 32027

from

$269.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design made from aluminum and polished to perfection.
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ATP – ATP Differential Cover Kit With Internal Magnet, 111101 (Part No.111101)

ATP Differential Cover Kit With Internal Magnet, 111101

from

$35.99
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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Top-Rated Differential Brands For Your 1985 GMC K1500

When it comes to finding the perfect Differential for your 1985 GMC K1500, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 17 trusted brands. We carry the most popular Differential brands including 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 1985 GMC K1500, providing peace of mind with parts that meet or exceed OEM standards.

Popular National 1985 GMC K1500 Differentials

If you’re looking for a top-quality Differential for your 1985 GMC K1500, 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 $19.69, you’ll find the perfect Differential for your needs and budget. National Differentials for the 1985 GMC K1500 come highly rated, with over 25 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 Multi-Purpose Seal, 8622
from $22.79
(20)
National Multi-Purpose Seal, 8622
“Perfect replacement for my vintage Pontiacs. I recommend this particular seal to al of my customers.”
National Bearing Race, LM501314
from $11.99
(2)
National Bearing Race, LM501314
“good quality & price”
National Tapered Roller Bearing Cone, LM104949
from $24.29
(3)
National Tapered Roller Bearing Cone, LM104949
“Needed an inner bearing when doing brakes on an old hunting truck.I prefer quality parts over those made in other countries and the price difference w”

Top-Quality Dorman 1985 GMC K1500 Differentials

For those in search of a high-quality Differential for their 1985 GMC K1500, 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 $66.92, giving you a range of options to suit your budget. Backed by over 35 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, 697-700
from $37.99
(14)
Dorman Differential Cover, 697-700
“Heavy steel with the original magnet. Fits like original.. Not a cheap stamping by any means”
Dorman Differential Yoke including Seal and Pinion Nut, 697-500
from $155.99
(10)
Dorman Differential Yoke including Seal and Pinion Nut, 697-500
“Will this fot 2001 jeep grand cherokee 4.0 limited with dana 35 read end”

FAQs for 1985 GMC K1500 Differentials

What are the best-selling Differentials for 1985 GMC K1500s?

Out of 258 Differentials that fit 1985 GMC K1500s, the following parts are the top sellers:

What’s the price range for 1985 GMC K1500 Differentials?

The prices of Differentials for the 1985 GMC K1500 range from $2.59 up to $1,350.00 for the most premium parts.

What is the average price of a Differential for a 1985 GMC K1500?

The average price for Differentials for the 1985 GMC K1500 is $211.62. 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 K1500 model years?

Yes, we carry Differentials for 18 model years of GMC K1500s between 1979 and 1999. The following model years are the most popular for Differential purchases: 1999, 1998, 1997, 1996, 1995, 1994, 1993, 1992, and 1991.

What are the cheapest Differentials for my 1985 GMC K1500?

The cheapest 1985 GMC K1500 Differentials we carry are:

Does Advance Auto Parts sell Differentials for any other 1985 GMC models?

Yes. We stock Differentials for 22 other popular 1985 GMC models. Some of the most popular are 1985 Jimmy Differentials, 1985 K2500 Differentials, 1985 C2500 Differentials, 1985 C1500 Differentials, and 1985 K3500 Differentials.

What types of Differentials do you sell for my 1985 GMC K1500?

As of 8/2/26, these are some of the most in-demand types of Differentials for a 1985 GMC K1500:

Can I get help with 1985 GMC K1500 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 K1500 Differentials?

Advance Auto Parts keeps returns simple. For new GMC K1500 Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.