LS and LT 400 LPH Fuel Tank Kit for 1973-1991 Chevy Blazer, Suburban, GMC Jimmy
As builders take on an LS or LT swap in a 1973 to 1991 Chevy Blazer, Suburban or GMC Jimmy, the factory tank often struggles to meet fuel demand during sudden throttle surges. The 1973-1991 Blazer/Suburban Fuel Tank Kit - 400 LPH Pump uses a 400 LPH pump and precision-ported openings to ensure steady flow under heavy load or steep grade climbs. Made from high grade steel, the tank resists corrosion and chassis vibration while keeping original mounting points for a straightforward installation. An integrated sending unit and factory standard seals arrive calibrated to original specs so installers avoid fitment issues and maintain accurate fuel level readings in all driving conditions.
Precision Flow Calibration for LS and LT Engine Demands
This kit combines a 400 LPH pump with precision-ported openings to match pump output and inlet geometry exactly. By sizing the ports to tight tolerances, fuel flows smoothly during sudden throttle bursts or steep grade climbs, preventing pressure dips that can starve LS or LT powerplants producing over 550 horsepower. The engineered balance also reduces the risk of cavitation under heavy loads, maintaining consistent pressure across a wide operating range. Builders will notice reliable throttle response whether on pavement, gravel, or challenging uphill runs.
Steel Body Construction Resisting Corrosion and Vibration
Crafted from high grade steel, the tank body withstands ethanol blends and moisture that accelerate wear in stock assemblies. Welded seams are reinforced to eliminate potential leak paths and endure frame flex and chassis vibration encounter on rough roads. Heavy duty straps and strengthened mounting brackets secure the tank firmly to the undercarriage while isolating shock from impacts. These fabrication choices deliver exceptional durability and long service life, even under extreme temperature swings or off-road use.
Factory Footprint Ensuring Simple Tank Installation
This assembly preserves every original mounting point on 1973 through 1991 Chevy Blazer, Suburban, and GMC Jimmy models, so no cutting or welding of the frame or floor pan is required. Matching the stock footprint and strap locations lets installers drop the tank into place and use factory hardware immediately. This design reduces installation time by eliminating alignment shims and complex fabrication steps. The result is a seamless integration that maintains factory ground clearance and chassis geometry without compromise.
Integrated Pump Module and Sending Unit Synergy
The in tank module arrives preassembled with the pump, sending unit, gaskets, filler neck, and vent filter all calibrated to original specifications. This consolidated design prevents parts mismatches and removes the need to chase separate seals or mounting hardware. The precision sending unit guarantees accurate fuel level readings from first startup through extended operation, keeping drivers informed under all driving angles. Installers benefit from a ready-to-install package that ensures precise fuel delivery and data without extra steps.
Count on MuscleRods to deliver consistent fuel pressure and a straightforward installation process. For a Smaller capacity fuel pump Kit at 255 LPH see our 1973-1991 Blazer/Suburban 255 LPH pump Tank Kit.