1987 GMC S15 Engine Additives

Keep Your 1987 GMC S15 in Top Shape with a Quality Engine Additive

When it comes to maintaining or upgrading your 1987 GMC S15, choosing high-quality parts is crucial for ensuring your vehicle stays in top shape, whether you’re tackling a repair or enhancing performance. At Advance Auto Parts, we know how important it is to find the right Engine Additive for your S15. We currently carry a top Engine Additive in stock that is built to last. Whether you’re replacing a damaged Engine Additive or looking to upgrade, our selection for the 1987 GMC S15 ensures you’ll find exactly what you need to keep your vehicle looking and performing its best.

Explore Related Parts

And while you’re here, don’t forget to check out related part categories like Coolant/Antifreeze and Fluids to complete your upgrade or repair project. At Advance Auto Parts, we’re proud to offer the parts and expertise to keep your 1987 GMC S15 running smoothly and looking great.

Essential 1987 GMC S15 Engine Additives

Powertrax – Grip LS Traction System (Part No.LS247528)

Grip LS Traction System

from

$499.99
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!
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Yukon Gear – Dura Grip Positraction For GM 7.625" With 28 Spline Axles, 3.23 & Up (Part No.26018)

Dura Grip Positraction For GM 7.625" With 28 Spline Axles, 3.23 & Up

from

$829.99
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.

Product Features:
  • Fits GM 7.625″ with 28 spline axles
  • 3.23 ratio and up only
  • 4-spring, clutch style positraction
  • Internal gears are manufactured using forged 4320 steel and cut to provide stronger teeth
  • Fully rebuildable
  • Assembled in the USA
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Yukon Gear – Dura Grip Positraction For GM 7.5" & 7.625" With 26 Spline Axles, 3.23 & Up (Part No.26017)

Dura Grip Positraction For GM 7.5" & 7.625" With 26 Spline Axles, 3.23 & Up

from

$889.99
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.

Product Features:
  • Fits GM 7.5″ and 7.625″ with 26 spline axles
  • 3.23 ratio and up only
  • 4-spring, clutch style positraction
  • Internal gears are manufactured using forged 4320 steel and cut to provide stronger teeth
  • Fully rebuildable
  • Assembled in the USA
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Most Popular Posi Units and Component for 1987 GMC S15s

Enhance your 1987 GMC S15 with this popular Posi Units and Component we have in stock, for $889.99.

Yukon Gear – Dura Grip Positraction For GM 7.5" & 7.625" With 26 Spline Axles, 3.23 & Up (Part No.26017)

Dura Grip Positraction For GM 7.5" & 7.625" With 26 Spline Axles, 3.23 & Up

from

$889.99
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.

Product Features:
  • Fits GM 7.5″ and 7.625″ with 26 spline axles
  • 3.23 ratio and up only
  • 4-spring, 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

FAQs for 1987 GMC S15 Engine Additives

What’s the price range for 1987 GMC S15 Engine Additives?

We currently have just one Engine Additives for the 1987 GMC S15 in stock: Dura Grip Positraction For GM 7.5" & 7.625" With 26 Spline Axles, 3.23 & Up and it costs $889.99.

Does Advance Auto Parts sell Engine Additives for other GMC S15 model years?

Yes, we carry Engine Additives for 6 model years of GMC S15s between 1983 and 1990. The following model years are the most popular for Engine Additive purchases: 1990, 1989, 1988, 1986, 1985, 1984, and 1983.

Does Advance Auto Parts sell Engine Additives for any other 1987 GMC models?

Yes. We stock Engine Additives for 10 other popular 1987 GMC models. Some of the most popular are 1987 Jimmy Engine Additives, 1987 Safari Engine Additives, 1987 G2500 Engine Additives, 1987 G1500 Engine Additives, and 1987 S15 Jimmy Engine Additives.

What types of Engine Additives do you sell for my 1987 GMC S15?

We currently have just 1 Engine Additive in stock for a 1987 GMC S15, and as of 11/2/25, it is a Posi Units and Component.

Can I get help with 1987 GMC S15 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 S15 Engine Additives?

Advance Auto Parts keeps returns simple. For new GMC S15 Engine Additives and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.