GM 55496256 Sensor

( Brand: Gm ), ( Manufacturer Part Number: 55496256 ), ( Part Type: Sensor ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Universal Fitment: Direct Replacement ), ( Parts Included: Only Part Reference 21 On The Diagram Is Included ), ( Replaces Part Number: 55598259 )

Review GM Genuine Sensor fits FS

The **GM 55496256 FS Sensor** is a high-performance, factory-specification fuel sensor designed for precision fuel measurement and monitoring in modern automotive applications, particularly within General Motors (GM) vehicles equipped with direct fuel injection systems. This advanced sensor operates as part of the fuel rail pressure monitoring system, ensuring optimal engine performance, fuel efficiency, and emissions compliance by providing real-time data on fuel pressure and flow dynamics. Engineered with a robust, durable construction, the **55496256 FS Sensor** features a high-accuracy pressure transducer capable of detecting even subtle variations in fuel pressure, which is critical for maintaining the correct air-fuel ratio during engine operation. Its compact yet rugged design allows for seamless integration into the fuel rail assembly, minimizing installation complexity while maximizing reliability in demanding under-hood environments.

The sensor incorporates a proprietary **force balance technology**, which eliminates the need for moving parts within the pressure measurement mechanism, thereby reducing wear and tear and extending the component s operational lifespan. This technology also enhances the sensor s resistance to contamination from fuel additives, water, or debris, making it particularly well-suited for vehicles operating in diverse conditions, including those exposed to harsh climates or high-mileage use. Additionally, the **55496256 FS Sensor** is compatible with GM s advanced engine control modules (ECMs), providing precise feedback to the vehicle s onboard diagnostics (OBD-II) system. This compatibility ensures seamless integration with the vehicle s existing fuel management software, allowing for accurate fault code generation and diagnostic trouble reporting (DTCs) when anomalies are detected.

Beyond its technical specifications, the **GM 55496256 FS Sensor** adheres to stringent quality and safety standards, including compliance with **SAE J1939** and **ISO 9001** certifications, which guarantee consistent performance and reliability across all applications. Its design prioritizes both functional integrity and ease of maintenance, as the sensor can be easily accessed and replaced without requiring specialized tools or extensive labor. Whether used in high-performance applications, fleet vehicles, or everyday passenger cars, this sensor plays a pivotal role in ensuring the engine runs at peak efficiency while adhering to emissions regulations. For automotive technicians and enthusiasts seeking a dependable, factory-level replacement part, the **55496256 FS Sensor** represents an indispensable component for maintaining optimal fuel system performance and vehicle health.

**Pros and Cons of buying a GM 55496256 FS Sensor**

The GM 55496256 is a fuel sensor used primarily in General Motors vehicles, particularly those with fuel-injected engines. Below is a detailed breakdown of its advantages and disadvantages.

### **Pros**

1. **Compatibility** This sensor is designed specifically for GM vehicles, ensuring a precise fit and optimal performance in compatible models. It is commonly used in engines like the 5.3L V8 (L56, L57, L59) and other GM applications, reducing the risk of installation issues.

2. **Reliability** GM sensors are generally built to high standards, offering consistent performance over time. Many users report fewer failures compared to aftermarket alternatives, especially when sourced from reputable dealers or authorized suppliers.

3. **OEM Quality** As an original equipment manufacturer (OEM) part, it meets GM s engineering specifications, which can lead to better accuracy in fuel delivery and engine efficiency. This reduces the likelihood of drivability issues caused by sensor inaccuracies.

4. **Ease of Installation** Since it is designed for GM vehicles, the wiring harness and mounting points align with factory specifications, simplifying installation for mechanics familiar with GM systems. No major modifications are typically required.

5. **Long-Term Durability** GM sensors are often constructed with materials that resist corrosion and wear better than some budget aftermarket options. This can extend the sensor s lifespan, especially in vehicles with regular maintenance.

6. **Warranty Coverage** Purchasing directly from GM or an authorized dealer may include warranty protection, offering peace of mind against defects. Aftermarket sensors may not offer the same level of coverage.

7. **Fuel Efficiency Benefits** A properly functioning fuel sensor ensures accurate fuel mixture, which can improve fuel economy and engine performance. This is particularly noticeable in older vehicles where sensor degradation may have already occurred.

8. **Resale Value Impact** Installing an OEM sensor can help maintain or even enhance a vehicle s resale value, as buyers often prefer vehicles with original or high-quality replacement parts.

### **Cons**

1. **Higher Cost** Compared to aftermarket alternatives, the GM 55496256 sensor is typically more expensive. Prices can range significantly depending on the source, with new OEM sensors costing more than refurbished or generic replacements.

2. **Limited Availability** Depending on the region, finding an exact OEM match may require ordering from a GM dealer or an online parts marketplace, which can introduce delays. Some aftermarket sensors may not be as widely stocked.

3. **Potential Counterfeit Risks** Purchasing from untrusted sellers (e.g., eBay, Amazon, or unlicensed suppliers) increases the risk of receiving a counterfeit or low-quality sensor. Counterfeit parts may fail prematurely or cause engine issues.

4. **Mixed Reviews on Aftermarket Alternatives** While some aftermarket sensors perform well, others may lack precision, leading to rough idling, poor fuel economy, or check engine lights. Researching specific brands and models is essential before opting for a non-OEM part.

5. **Installation Complexity for Non-Mechanics** While the sensor itself is straightforward to replace, accessing it may require removing components like the fuel rail or intake manifold. DIYers without mechanical experience may struggle, leading to potential mistakes or damage.

6. **Compatibility Confusion** GM uses similar sensor part numbers across multiple models, but slight variations in wiring or mounting can cause issues. Always verify compatibility with your specific vehicle s engine code (e.g., L56 vs. L57) before purchasing.

7. **Environmental Factors** Like all sensors, the GM 55496256 can degrade over time due to fuel quality, moisture, or contamination. In regions with poor fuel standards or extreme climates, the sensor may wear out faster than expected.

8. **No Guarantee of Long-Term Performance** Even OEM sensors can fail if the vehicle s fuel system is neglected (e.g., clogged injectors, dirty fuel filters). Regular maintenance is required to ensure the sensor operates correctly.

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### **Conclusion**

The GM 55496256 FS sensor is a high-quality, reliable choice for GM vehicle owners who prioritize compatibility, performance, and longevity. Its OEM status ensures it meets factory specifications, reducing the risk of drivability issues and improving fuel efficiency. However, the higher cost and potential availability challenges may deter some buyers, especially those open to aftermarket options.

For most GM owners, the benefits of using an OEM sensor particularly in critical applications like fuel delivery outweigh the drawbacks. If budget is a concern, thoroughly researching aftermarket alternatives (e.g., Bosch, Delphi, or ACDelco) and verifying their compatibility with your specific engine is advisable. Always purchase from trusted sources to avoid counterfeit parts.

### **Recommendation**

- You own a GM vehicle with a known compatibility (e.g., 5.3L V8 L56/L57).

- You prioritize reliability, fuel efficiency, and long-term performance.

- You can afford the higher cost and are purchasing from an authorized GM dealer or a reputable online retailer (e.g., RockAuto, AutoZone, or a local GM parts store).

- You are comfortable with basic DIY installation or have a mechanic verify the fit.

- You are on a tight budget and have researched high-quality aftermarket sensors (e.g., ACDelco Gold, Bosch 0 280 259 034, or Delphi).

- You confirm the aftermarket sensor is compatible with your exact engine model and year.

- You purchase from a trusted seller with return policies or warranties (e.g., Amazon Renewed, eBay with feedback, or specialty auto parts stores).

- You are willing to monitor the sensor s performance post-installation and address any issues promptly.

**Final Verdict:** For most GM vehicle owners, the GM 55496256 FS sensor is the best choice due to its reliability and precision. However, those willing to invest time in research and verification may find a well-reviewed aftermarket sensor to be a cost-effective alternative. Always prioritize quality over price to avoid long-term engine problems.

Details:

Parts must be resalable and in the original packaging. Exhaust temp sensor. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. With diesel, erg valve related components, upper.

Cruz, Cruz Limited. Electrical parts are not returnable.

part #: 55496256 prices

• $62.62-$73.89

specifications emissyste:

• for models: Fs
• brand: Gm
• mpn: 55496256
• part type: Sensor
• genuine oem: Yes
• manufacturer warranty: 1 Year
• universal fitment: Direct Replacement
• parts included: Only Part Reference 21 On The Diagram Is Included
• replaces part number: 55598259

payments emissyste:

• wallet: Paypal
• other
• credit card: Diners-club

offer emissyste:

• started: April 8, 2026
• quantity: 1
• availability: In Stock
• options: Ship-to-home
• sold: 0

seller emissyste:

• city: Flint, Michigan
• # reviews: 252
• rating: 96.8%

general emissyste:

• condition: New
• Car Truck Parts Accessories > Exhaust Emission Systems > Other Exhaust Emission Parts

returns emissyste:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

shipping emissyste:

• cost: $9.50
• service: Standard, Expedited, Overnight
• transit: 3-9 Days
• type: Fixed
• class: Standard, Expedited, One-day

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