Restore fuel system reliability, prevent engine hesitation, and ensure factory-grade performance by upgrading to the GM Genuine
2204852 fuel pump assembly, engineered as a direct replacement for the discontinued 2521196. This guide covers compatibility, failure symptoms, installation steps, and why OEM pumps outperform aftermarket options in pressure accuracy, durability, and integration for GM trucks and SUVs.
Product Overview & Key Features
Part Numbers & Applications
2204852:
Replaces: 2521196 (phased out after 2020), 13442238, 19177162.
Compatibility:
Chevrolet Silverado 1500 (2014–2020) with 5.3L/6.2L V8.
GMC Sierra 1500 (2014–2020).
Chevrolet Tahoe/Suburban (2015–2020).
Features:
Brushless motor (180+ psi), ethanol-resistant PTFE hoses.
Integrated fuel filter (15µm stainless mesh), anti-cavitation design.
Technical Specifications
Flow Rate: 750 LPH (supports 600+ HP applications).
Voltage: 12V/85A, PWM-controlled for adaptive fuel demand.
Material: Forged aluminum housing, Viton seals (E85 compatible).
Wiring: 4-pin connector with EMI-shielded harness.
Warranty:
3 years/75k miles – Covers motor failure, leaks, and sensor malfunctions.
Symptoms of a Failing 2521196/2204852 Fuel Pump
Long Cranking: Extended ignition time (codes P0087, P0231).
Power Loss: Hesitation during acceleration or towing.
High-Pitched Whine: Audible noise from the fuel tank.
Stalling at Idle: Engine shuts off randomly (lean fuel mixture).
Contamination: Clogged filter sock (metal debris from tank corrosion).
OEM vs. Aftermarket Comparison
Feature 2204852 (OEM) Aftermarket Pumps
Motor Design Brushless (no carbon wear, 100k+ mile lifespan) Brushed (fails at 40k–60k miles)
Pressure Control ECM-synced PWM for precise fuel curves Fixed-speed (overworks ECU)
Ethanol Resistance Viton seals and PTFE hoses (E85-ready) Buna-N seals (swell with ethanol)
Filter Efficiency 15µm stainless mesh (traps micro-debris) 30µm nylon (clogs faster)
Warranty Coverage Includes labor reimbursement at dealers 1-year limited (no labor support)
Installation Guide
Tools Required:
Fuel line disconnect tool, torque wrench (10–45 Nm), jack stands, safety gloves.
Steps:
Depressurize Fuel System:
Remove fuel cap, disconnect fuel pump relay, crank engine for 10 seconds.
Lower Fuel Tank:
Support tank with a transmission jack, disconnect electrical/vent lines.
Replace Assembly:
Remove lock ring (counterclockwise), swap 2521196 with 2204852.
Align filter sock arrow toward the front of the tank.
Reassemble & Test:
Torque lock ring to 40 Nm (30 ft-lbs), reconnect all lines.
Prime the system by turning the ignition to “ON” 3 times before starting.
Where to Buy & Red Flags
Trusted Suppliers:
GM dealerships, GMpartsDirect, GMPartsNow.
Avoid:
Pumps lacking Genuine GM hologram labels.
Sellers claiming “universal fit” for 2521196 (GM requires VIN-specific calibration).
Maintenance Tips
Replace fuel filter sock every 50k miles (GM part# 13590529).
Use TOP TIER gasoline to prevent injector deposits.
Inspect fuel tank for rust during pump replacement.
FAQ
Q: Does 2204852 fit a 2018 Silverado 2500HD?
A: No – HD models require pump 84093645 for 6.0L/6.6L engines.
Q: Can I reuse the fuel level sensor from 2521196?
A: Yes – The 2204852 retains the same sensor design.
Q: Why does my pump still whine after replacement?
A: Air in the lines – Prime the system again or check for leaks.
Q: Will aftermarket pumps cause check engine lights?
A: Yes – Non-PWM pumps trigger codes like P0627 (fuel pump control circuit).
Q: Is 2204852 compatible with diesel engines?
A: No – Use part# 12689452 for Duramax applications.
Conclusion
The GM 2204852 fuel pump assembly delivers a direct, high-performance replacement for the obsolete 2521196, ensuring precise fuel delivery, E85 compatibility, and extended service life for GM trucks and SUVs. OEM engineering eliminates risks like ethanol degradation and ECU mismatches, safeguarding your engine from lean conditions and stalling. Protect your vehicle’s reliability and warranty by choosing Genuine GM components.
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