A-Premium High Volume Oil Pump for GM LS 4.8L–6.2L Engines — 55/50 PSI Dual-Spring High-Flow Replacement

A-Premium High Volume Oil Pump is a direct-replacement high-flow oil pump engineered for GM LS-series 4.8L, 5.3L, 5.7L, 6.0L and 6.2L V8 engines to restore proper oil delivery and pressure.

This high-volume oil pump from A-Premium is built to fit a wide range of GM vehicles and swaps, offering two replaceable pressure relief springs to tune operating pressure. It’s designed as a bolt-in alternative to OE pumps for owners and technicians who need reliable oil circulation across common LS applications — from stock trucks to mild performance builds. The following details explain fitment, pressure options, installation considerations, and who benefits most from this unit.

Which vehicles and LS engines will this pump fit?

The A-Premium High Volume Oil Pump is compatible with many GM platforms that use LS-series engines. Fitment covers a broad list of Chevrolet, GMC, Cadillac, Buick, Hummer, Pontiac, Saab and Isuzu models across model years noted by manufacturers.

• Compatible with LS 4.8L, 5.3L, 5.7L, 6.0L and 6.2L engines.
• Included fitment examples: Silverado, Sierra, Suburban, Tahoe, Avalanche, Express, Corvette, Camaro, Escalade, CTS, H2/H3, Trailblazer, SSR, GTO, Firebird, Saab 9-7x and more.
• Check factory part references and engine year to confirm exact interchange (replaces part number 10296).

How do the two relief springs affect oil pressure and engine protection?

This pump ships with two serviceable relief springs: a 55 PSI spring preinstalled and a 50 PSI spring as an alternative. Swapping springs provides a simple way to adjust maximum oil pressure to match application needs without altering the pump’s core components.

• 55 PSI spring installed by default for higher-pressure requirements.
• 50 PSI spring available if a lower maximum pressure is preferred.
• Both springs help limit pressure spikes and reduce risk of ruptured oil tubes in high-load conditions.

What should I expect during installation and maintenance?

Installation is straightforward for experienced mechanics and shops familiar with LS oil system work; the pump bolts into the engine like OE units. Routine checks of torque, gasket sealing, and oil level are recommended after installation and following the first short break-in drive.

• Use correct torque values and a clean gasket/sealing surface during install.
• Prime the oil system or crank engine with disabled ignition to build initial oil pressure before starting.
• Re-check pressure and inspect for leaks after initial run and heat cycles.

What warranty and quality assurances come with the pump?

A-Premium backs this oil pump with a one-year, unlimited-mileage guarantee to cover manufacturing defects and workmanship. The brand emphasizes quality control and broad accessory coverage so you can replace the pump with confidence.

• One-year unlimited-mileage guarantee from A-Premium.
• Manufactured as a direct-replacement aftermarket unit to meet common fitment and pressure needs.
• Includes two relief springs for pressure tuning and longer service life when installed correctly.

Who is this for: The A-Premium High Volume Oil Pump is best suited for owners, mechanics and builders working on GM LS engines who need a dependable, direct-replacement pump with tunable relief pressure. It’s a practical choice for towing or high-load daily drivers, mild performance upgrades, engine rebuilds, and restorations where restoring or improving oil flow and pressure is required. Always confirm specific model-year fitment and consult service manuals for installation procedures and torque specs.