A-Premium High Pressure Fuel Pump for 2.4L GM Engines — EP1028 with Gasket & Bolts, Direct On‑Engine Replacement

A-Premium's direct injection high pressure fuel pump (EP1028) is a complete on-engine replacement that restores proper fuel rail pressure for compatible 2.4L GM vehicles and ships with a gasket and mounting bolts.

If your vehicle is showing low fuel rail pressure or the diagnostic codes P0087/P0088 after ruling out electrical and filter issues, this A-Premium high pressure fuel pump is a direct-fit service part designed for many Buick, Chevrolet and GMC 2.4L applications. Built to match factory connection types and mounting locations, the unit includes the external gasket and bolts needed for installation so you can replace the failed on-engine pump without sourcing extra hardware.

Which vehicles and engines will this pump fit?

This pump is intended for 2.4L inline-4 GM engines across several model years. Confirm compatibility by cross-referencing the listed reference numbers or checking your engine code and production year before ordering.

• Buick LaCrosse 2010–2016 L4 2.4L; Verano 2012–2017 L4 2.4L; Regal 2011–2017 L4 2.4L (including select MHEV and Engine Code K years)
• Chevrolet Equinox 2010–2017, Captiva Sport 2012–2015, Impala 2014, Malibu 2013–2014, Orlando 2012–2014 (all L4 2.4L)
• GMC Terrain 2010–2017 L4 2.4L
• Cross-reference numbers: EP1028, GDP103, M73109, 12641847, 12608371 and related OEM references

How does this pump connect and what hardware is included?

The A-Premium unit replicates factory fittings so installation is straightforward for a qualified technician. It features the same electrical and fuel connections as the original high pressure pump and arrives with the critical mounting parts you’ll need.

• Connector shape: rectangular electrical plug; terminals: 2 blade-style
• Fuel inlet: quick-connect with 0.375 inch outside diameter; inlet thread size M14-1.5
• Fuel outlet: threaded fitting; pump includes gasket and mounting bolts
• Note: this is an on-engine high pressure fuel pump, not an in-tank fuel pump

What symptoms indicate this part is the right repair?

Low fuel rail pressure is the primary symptom that points to a failing high pressure fuel pump. Before replacing the pump, confirm diagnostics and rule out related causes to prevent unnecessary parts replacement.

• Check engine light with codes P0087 (low fuel rail pressure) or P0088 (high rail pressure) as an initial indicator
• Measured fuel rail pressure lower than manufacturer spec under load
• Mechanic inspection confirming HPFP failure — verify electrical feed, fuel supply, and filters first

Any special installation tips or precautions?

Proper alignment and torque during installation are important to ensure the pump plunger sits perpendicular to the camshaft and to avoid premature wear. Follow the tightening sequence and use the supplied gasket to prevent leaks.

• Pre-tighten bolts on both sides evenly so the pump body plunger aligns squarely with the camshaft
• Tighten bolts to manufacturer torque specs after even pre-tightening
• Replace gasket and inspect O-rings; bleed air from fuel system per vehicle procedure

Who this is for: This A-Premium EP1028 high pressure fuel pump is for owners, mechanics or fleet managers working on compatible GM 2.4L engines who have confirmed low fuel rail pressure or received relevant diagnostic trouble codes. It’s intended for technicians comfortable with on-engine fuel system service; do not order if you need an in-tank pump. Verify fitment, confirm symptoms, and follow safe fuel-system procedures during replacement.