1976 GMC C25 Engine Additives

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Keep Your 1976 GMC C25 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 1976 GMC C25 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 1976 GMC C25 Engine Additive at Advance Auto Parts is around $428.99, with a range that starts at $376.99 and goes up to $480.99. With 2 options in stock from one trusted brand, finding the right fit is easy. Popular picks like Lock Right Locker and Grip LS Traction System start at just $376.99 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 1976 GMC C25 in peak condition, inside and out.

Essential 1976 GMC C25 Engine Additives

Powertrax – Lock Right Locker (Part No.1910-LR)

Lock Right Locker

from

$376.99
The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! 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!
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    Powertrax – Grip LS Traction System (Part No.LS231230)

    Grip LS Traction System

    from

    $480.99
    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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    Most Popular Posi Units and Components for 1976 GMC C25s

    Enhance your 1976 GMC C25 with one of the 2 Posi Units and Components we have in stock, starting at just $376.99.

    Powertrax – Lock Right Locker (Part No.1910-LR)

    Lock Right Locker

    from

    $376.99
    The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! 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

    Powertrax – Grip LS Traction System (Part No.LS231230)

    Grip LS Traction System

    from

    $480.99
    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!
    See More

    FAQs for 1976 GMC C25 Engine Additives

    What are the best-selling Engine Additives for 1976 GMC C25s?

    Out of 2 Engine Additives that fit 1976 GMC C25s, the following parts are the top sellers:

    What’s the price range for 1976 GMC C25 Engine Additives?

    The prices of Engine Additives for the 1976 GMC C25 range from $376.99 up to $480.99 for the most premium parts.

    What is the average price of an Engine Additive for a 1976 GMC C25?

    The average price for Engine Additives for the 1976 GMC C25 is $428.99. 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.

    Does Advance Auto Parts sell Engine Additives for other GMC C25 model years?

    Yes, we carry Engine Additives for 2 model years of GMC C25s between 1975 and 1978. The following model years are the most popular for Engine Additive purchases: 1977, 1975, and 1978.

    What are the cheapest Engine Additives for my 1976 GMC C25?

    The cheapest 1976 GMC C25 Engine Additives we carry are:

    Does Advance Auto Parts sell Engine Additives for any other 1976 GMC models?

    Yes. We stock Engine Additives for 8 other popular 1976 GMC models. Some of the most popular are 1976 Jimmy Engine Additives, 1976 K25 Engine Additives, 1976 K15 Engine Additives, 1976 G25 Engine Additives, and 1976 C15 Engine Additives.

    What types of Engine Additives do you sell for my 1976 GMC C25?

    We currently have just 1 Engine Additive in stock for a 1976 GMC C25, and as of 3/1/26, it is a Posi Units and Component.

    Can I get help with 1976 GMC C25 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 C25 Engine Additives?

    Advance Auto Parts keeps returns simple. For new GMC C25 Engine Additives and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.