1978 GMC K35 Engine Additives

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Keep Your 1978 GMC K35 in Top Shape with Quality Engine Additives

Whether you’re repairing or upgrading your Engine Additive, using high-quality parts is key to keeping your 1978 GMC K35 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Posi Units and Components. 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.

Competitive Prices and Extensive Inventory

The average price for a 1978 GMC K35 Engine Additive at Advance Auto Parts is around $510.79, with a range that starts at $5.99 and goes up to $1,204.99. With 5 options in stock from 2 trusted brands, finding the right fit is easy. Popular picks like Yukon Gear Replacement Inner Slinger For Dana 60, 33014, Yukon Gear Replacement Outer Oil Slinger For Dana 60, 70, 70U & 70HD, 33019, and Yukon Gear Grizzly Locker For Dana 60, 4.56 & Up, 30 Spline, 28004 start at just $5.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Engine Additive, don’t forget to check out other key components like Coolant/Antifreeze and Fluids. At Advance Auto Parts, we’re here to help you keep your 1978 GMC K35 in peak condition, inside and out.

Essential 1978 GMC K35 Engine Additives

Motive Gear – Motive Gear Differential Spool, FSD60-35H (Part No.FSD60-35H)

Motive Gear Differential Spool, FSD60-35H

from

$186.99
Motive Gear Differential Spool, FSD60-35H.
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Yukon Gear – Yukon Gear Replacement Inner Slinger For Dana 60, 33014 (Part No.33014)

Yukon Gear Replacement Inner Slinger For Dana 60, 33014

from

$9.99
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.
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Yukon Gear – Yukon Gear Grizzly Locker For Dana 60, 4.56 & Up, 30 Spline, 28004 (Part No.28004)

Yukon Gear Grizzly Locker For Dana 60, 4.56 & Up, 30 Spline, 28004

from

$1204.99
The Yukon Grizzly Locker is the ultimate in locking differentials for street, off-road, & drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns. The Yukon Grizzly locker is a mechanical locking differential. It features a forged case and 8620 internals for maximum strength. It’s patented design reduces common locker failures. All units assembled in the USA! All Grizzly Lockers are backed by the best warranty in the business! Yukon covers the replacement unit and covers any collaterally damaged parts and associated labor, up to $2,000! This is a narrow case locker. If you have a wide housing, please order two DS 42563 with your locker. This locker is ABS compatible.
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Yukon Gear – Yukon Gear Grizzly Locker For Dana 60, 4.10 & Down, 40 Spline, 28024 (Part No.28024)

Yukon Gear Grizzly Locker For Dana 60, 4.10 & Down, 40 Spline, 28024

from

$1145.99
The Yukon Grizzly Locker is the ultimate in locking differentials for street, off-road, & drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns. The Yukon Grizzly locker is a mechanical locking differential. It features a forged case and 8620 internals for maximum strength. It’s patented design reduces common locker failures. All units assembled in the USA! All Grizzly Lockers are backed by the best warranty in the business! Yukon covers the replacement unit and covers any collaterally damaged parts and associated labor, up to $2,000! This is a narrow case locker. If you have a wide housing, please order two DS 42563 with your locker. This locker is ABS compatible.
See More

Yukon Gear – Yukon Gear Replacement Outer Oil Slinger For Dana 60, 70, 70U & 70HD, 33019 (Part No.33019)

Yukon Gear Replacement Outer Oil Slinger For Dana 60, 70, 70U & 70HD, 33019

from

$5.99
The Yukon Grizzly Locker is the ultimate in locking differentials for street, off-road, & drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns. The Yukon Grizzly locker is a mechanical locking differential. It features a forged case and 8620 internals for maximum strength. It’s patented design reduces common locker failures. All units assembled in the USA! All Grizzly Lockers are backed by the best warranty in the business! Yukon covers the replacement unit and covers any collaterally damaged parts and associated labor, up to $2,000!
See More

Most Popular Posi Units and Components for 1978 GMC K35s

Enhance your 1978 GMC K35 with one of the 5 Posi Units and Components we have in stock, starting at just $5.99.

Yukon Gear – Yukon Gear Replacement Inner Slinger For Dana 60, 33014 (Part No.33014)

Yukon Gear Replacement Inner Slinger For Dana 60, 33014

from

$9.99
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.
See More

Yukon Gear – Yukon Gear Replacement Outer Oil Slinger For Dana 60, 70, 70U & 70HD, 33019 (Part No.33019)

Yukon Gear Replacement Outer Oil Slinger For Dana 60, 70, 70U & 70HD, 33019

from

$5.99
The Yukon Grizzly Locker is the ultimate in locking differentials for street, off-road, & drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns. The Yukon Grizzly locker is a mechanical locking differential. It features a forged case and 8620 internals for maximum strength. It’s patented design reduces common locker failures. All units assembled in the USA! All Grizzly Lockers are backed by the best warranty in the business! Yukon covers the replacement unit and covers any collaterally damaged parts and associated labor, up to $2,000!
See More

Yukon Gear – Yukon Gear Grizzly Locker For Dana 60, 4.56 & Up, 30 Spline, 28004 (Part No.28004)

Yukon Gear Grizzly Locker For Dana 60, 4.56 & Up, 30 Spline, 28004

from

$1204.99
The Yukon Grizzly Locker is the ultimate in locking differentials for street, off-road, & drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns. The Yukon Grizzly locker is a mechanical locking differential. It features a forged case and 8620 internals for maximum strength. It’s patented design reduces common locker failures. All units assembled in the USA! All Grizzly Lockers are backed by the best warranty in the business! Yukon covers the replacement unit and covers any collaterally damaged parts and associated labor, up to $2,000! This is a narrow case locker. If you have a wide housing, please order two DS 42563 with your locker. This locker is ABS compatible.
See More

Yukon Gear – Yukon Gear Grizzly Locker For Dana 60, 4.10 & Down, 40 Spline, 28024 (Part No.28024)

Yukon Gear Grizzly Locker For Dana 60, 4.10 & Down, 40 Spline, 28024

from

$1145.99
The Yukon Grizzly Locker is the ultimate in locking differentials for street, off-road, & drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns. The Yukon Grizzly locker is a mechanical locking differential. It features a forged case and 8620 internals for maximum strength. It’s patented design reduces common locker failures. All units assembled in the USA! All Grizzly Lockers are backed by the best warranty in the business! Yukon covers the replacement unit and covers any collaterally damaged parts and associated labor, up to $2,000! This is a narrow case locker. If you have a wide housing, please order two DS 42563 with your locker. This locker is ABS compatible.
See More

Motive Gear – Motive Gear Differential Spool, FSD60-35H (Part No.FSD60-35H)

Motive Gear Differential Spool, FSD60-35H

from

$186.99
Motive Gear Differential Spool, FSD60-35H.
See More

FAQs for 1978 GMC K35 Engine Additives

What are the best-selling Engine Additives for 1978 GMC K35s?

Out of 5 Engine Additives that fit 1978 GMC K35s, the following parts are the top sellers:

What’s the price range for 1978 GMC K35 Engine Additives?

The prices of Engine Additives for the 1978 GMC K35 range from $5.99 up to $1,204.99 for the most premium parts.

What is the average price of an Engine Additive for a 1978 GMC K35?

The average price for Engine Additives for the 1978 GMC K35 is $510.79. Keep in mind the variety of part types within our Engine Additive category, where you are likely to find a wide range of prices across a variety of parts and components.

What are the cheapest Engine Additives for my 1978 GMC K35?

Does Advance Auto Parts sell Engine Additives for any other 1978 GMC models?

Yes. We stock Engine Additives for 8 other popular 1978 GMC models. Some of the most popular are 1978 Jimmy Engine Additives, 1978 K25 Engine Additives, 1978 K15 Engine Additives, 1978 G25 Engine Additives, and 1978 C15 Engine Additives.

What types of Engine Additives do you sell for my 1978 GMC K35?

We currently have just 1 Engine Additive in stock for a 1978 GMC K35, and as of 8/2/26, it is a Posi Units and Component.

Can I get help with 1978 GMC K35 Engine Additive orders?

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

What is your return policy for GMC K35 Engine Additives?

Advance Auto Parts keeps returns simple. For new GMC K35 Engine Additives and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.