2204403 Fuel Pump Assembly - Direct Replacement for 2521116 | MAYCCI OEM Fit

Part Numbers & Applications‌
2204403‌ (Direct Fit Replacement for 2521116):
Models‌:
Chevrolet Silverado 1500 (2014–2018)‌: 4.3L V6, 5.3L V8 (L83/L8B), 6.2L V8 (L86).
GMC Sierra 1500 (2014–2018)‌: 5.3L EcoTec3, 6.2L Denali.
Cadillac Escalade (2015–2020)‌: 6.2L L86, 6.2L L87.
Function‌: Delivers 58–65 PSI fuel pressure via a brushless electric motor (compatible with flex-fuel systems).
Replaces‌: 2521116, 25332385, 25342735 (obsolete).
Key Features‌:
High-Performance Design‌:
Reinforced nylon housing (resists ethanol corrosion).
150-micron stainless steel inlet filter (prevents debris ingress).
Integrated fuel level sensor (accuracy ±3% full scale).

Common faults of fuel pump assembly include insufficient fuel pressure, abnormal noise, leakage and circuit fault. Solution: check the filter, replace the worn parts, fasten the sealing ring, and repair the circuit connection. Regular maintenance and timely replacement of vulnerable parts can effectively prevent failures.

In recent years, customer demand in the fuel pump assembly industry has changed significantly. With the increasingly stringent environmental regulations, customers have put forward higher requirements for the efficient and energy-saving performance of fuel pumps, especially in the field of new energy vehicles, the demand for electric fuel pumps and high-pressure common rail technology is growing rapidly. At the same time, the demand for intelligence and precision has increased. Customers hope that the fuel pump can work seamlessly with the electronic control unit (ECU) to improve engine performance and driving experience. In addition, durability and reliability are still the focus of customers' attention, especially in the field of commercial vehicles and construction machinery.