1973 GMC C15/C1500 Pickup Engine Additives

Keep Your 1973 GMC C15/C1500 Pickup in Top Shape with a Quality Engine Additive

When it comes to maintaining or upgrading your 1973 GMC C15/C1500 Pickup, 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 C15/C1500 Pickup. 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 1973 GMC C15/C1500 Pickup 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 1973 GMC C15/C1500 Pickup running smoothly and looking great.

Essential 1973 GMC C15/C1500 Pickup 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!
  • See More

    Powertrax – Lock Right Locker (Part No.1940-LR)

    Lock Right Locker

    from

    $441.99
    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 – No-Slip Traction System (Part No.9204603500)

    No-Slip Traction System

    from

    $565.99
    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!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

    Most Popular Posi Units and Component for 1973 GMC C15/C1500 Pickups

    Enhance your 1973 GMC C15/C1500 Pickup with this popular Posi Units and Component we have in stock, for $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

    FAQs for 1973 GMC C15/C1500 Pickup Engine Additives

    What’s the price range for 1973 GMC C15/C1500 Pickup Engine Additives?

    We currently have just one Engine Additives for the 1973 GMC C15/C1500 Pickup in stock: Lock Right Locker and it costs $376.99.

    Does Advance Auto Parts sell Engine Additives for other GMC C15/C1500 Pickup model years?

    Yes, we carry Engine Additives for 6 model years of GMC C15/C1500 Pickups between 1967 and 1974. The following model years are the most popular for Engine Additive purchases: 1974, 1972, 1971, 1970, 1969, 1968, and 1967.

    Does Advance Auto Parts sell Engine Additives for any other 1973 GMC models?

    What types of Engine Additives do you sell for my 1973 GMC C15/C1500 Pickup?

    We currently have just 1 Engine Additive in stock for a 1973 GMC C15/C1500 Pickup, and as of 11/2/25, it is a Posi Units and Component.

    Can I get help with 1973 GMC C15/C1500 Pickup 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 C15/C1500 Pickup Engine Additives?

    Advance Auto Parts keeps returns simple. For new GMC C15/C1500 Pickup Engine Additives and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.