LS Fuel Pump and Fitting Kit for 1987-1997 GM Trucks and 1994-1995 Chevy S-10 Pickup
Swapping an LS engine into a 1987-1997 GM truck or a 1994-1995 S-10 pickup often stalls when the factory pump and fittings cannot maintain consistent pressure. This Fuel Pump and Fitting Kit 1987-1997 pairs a Walbro 255 LPH in the tank pump with matched adapters that align precisely with factory sending unit ports and remove the need for cutting stock lines or adding sleeves. Constructed from corrosion resistant alloys, the fittings guide fuel along an optimized flow path that preserves pressure under full throttle and resists ethanol attack. Installers lower the assembly into the original tank opening, tighten the clamp and connect directly to the fuel line and regulator for steady fuel flow across the LS rpm range.
Integrated Walbro 255 LPH Submerged Pump Ensuring Continuous Cooling
The Fuel Pump and Fitting Kit features a genuine Walbro 255 LPH unit designed to operate fully submerged within the factory fuel tank. Immersion in fuel provides a constant cooling effect that dissipates heat generated by the motor and electronics, preserving internal components and prolonging service life. Reduced operating temperature also limits the formation of vapor pockets, which can lead to inconsistent pressure or cavitation under heavy throttle. Noise is dampened by the liquid medium, yielding a quieter operation compared to external pump arrangements. By maintaining rated flow even during extended high demand, this design safeguards against lean conditions and supports stable engine management.
Precision Fitting Alignment for GM Truck and S-10 Pickup Installation
Each adapter in the kit is machined to mirror the exact port geometry found on 1987–1997 GM full size trucks and 1994–1995 Chevy S-10 pickup sending units. This factory matched alignment eliminates the need for cutting stock lines or fabricating custom sleeves, saving hours of trial and error and reducing the risk of leaks. Clean interfaces between the adapter flanges and tank flange preserve seal integrity, which is critical for safe operation and long term service. Technicians simply lower the assembly into the original opening, clamp in place, then connect to the factory fuel line and regulator. The result is a straightforward installation that retains the vehicle's underbody clearance and original plumbing layout.
Optimized Flow Path for Steady Pressure Under Load
The kit's internal bore profiles and port orientations have been engineered to promote a smooth, direct flow path from pump outlet to regulator feed line. By minimizing abrupt changes in direction and internal turbulence, the fittings reduce pressure drop at high rpm or when towing heavy loads. Consistent fuel supply ensures the engine control unit maintains precise timing and air fuel ratio control, avoiding lean spikes that can harm performance or cause knock. Improved throttle response is a natural outcome of this efficient routing, and matching pump output to ECU demands can also contribute to better fuel economy. Installers and end users alike benefit from a system that maintains factory level pressure stability in all driving conditions.
Corrosion Resistant Alloy Construction for Ethanol Fuel Durability
All fittings and housing components are crafted in the USA from alloys chosen for their resistance to moisture, road salt and ethanol blends common in modern fuels. These materials resist pitting, stress corrosion and chemical attack even after prolonged exposure to fluctuating temperatures and vibration. Special surface finishes on seal surfaces preserve tight tolerances through repeated thermal cycles, ensuring leak free operation across thousands of miles. By relying on proven corrosion performance, the kit continues to deliver reliable fuel delivery in harsh environments. Vehicle owners can trust that ethanol compatibility will not compromise durability or require premature replacement.
Engineered for a precise fit and consistent pressure in your LS swap project.