400 LPH Fuel Tank Kit for 1973-1991 Chevy Blazer/Suburban/GMC Jimmy LS and LT Swaps
Swapping an LS or LT powerplant into a 1973 to 1991 Chevy Blazer or Suburban puts extra demand on the stock tank's ability to deliver consistent fuel flow during sudden throttle bursts or heavy towing. The 1973-1991 Blazer/Suburban Fuel Tank Kit with a 400 LPH pump addresses that requirement through precision porting and a steel body that stands up to corrosion and vibration. With factory mounting points and an integrated sending unit, this assembly installs quickly while ensuring accurate fuel level readings under all driving conditions.
Precision Porting and 400 LPH Pump Performance
The core of this kit is a 400 LPH pump carefully matched to the precision-ported inlet and outlet openings in the in-tank module. By sizing the ports to exact tolerances, fuel flows smoothly under sudden throttle changes, preventing pressure dips that can starve an LS or LT powerplant producing over 550 horsepower. This engineered relationship between pump output and port geometry also minimizes the risk of cavitation when climbing steep grades or towing heavy loads. Gearhead installers will appreciate that this arrangement delivers consistent pressure across a wide operating range, ensuring reliable throttle response whether on the street or trail.
Durable Steel Construction for Corrosion and Vibration Resistance
Crafted from high grade steel, the tank body resists ethanol blends and moisture that often accelerate wear in legacy assemblies. Robust welded seams eliminate potential leak paths and stand up to frame flex and chassis vibration mile after mile. Heavy duty straps and reinforced mounting brackets anchor the unit firmly to the underbody, isolating it from harsh impacts without transmitting shock to the fuel lines. Together, these fabrication techniques guarantee long service life even under rugged driving conditions or extreme temperature swings.
Factory-Aligned Mounting Simplifies EFI Installation
This fuel tank kit preserves all original mounting points on 1973 through 1991 Blazer, Suburban, and GMC Jimmy models, requiring no cutting or welding to the frame or floor pan. By replicating the stock footprint and strap locations, the assembly drops into place quickly and locks down with factory hardware. Installers save hours of fabrication work and avoid alignment shims, allowing them to focus on plumbing and electrical connections instead of tank fitment. The result is a seamless integration that maintains factory ground clearance and chassis geometry without compromise.
Integrated Pump Module and Sending Unit Ensuring Accurate Fuel Data
The assembled in-tank module combines the 400 LPH pump, sending unit, and premium sealing gaskets into one ready-to-install package. This complete assembly arrives calibrated to the original tank opening and includes a new filler neck and vent filter to manage internal pressure under all driving angles. With hardware and gaskets matched to factory specifications, installers avoid parts mismatches and eliminate the late-night hunt for elusive seals or bolts. The precision sending unit guarantees accurate level readings from first startup through extended operation, keeping drivers informed and confident on every journey.
Engineered for precise fit and lasting service. For a smaller capacity fuel pump kit at 255 LPH see our 1973-1991 Blazer/Suburban 255 LPH pump Tank Kit.