General Motors Fuel Pressure Sensor Replacement Part 12616646 12677836

This fuel pressure sensor is a service part designed as a direct replacement for certain General Motors petrol engines. It carries the manufacturer's original part numbers, 12616646 and 12677836, indicating its specific application. The component is crucial for the engine control unit to accurately monitor the pressure within the fuel rail, ensuring optimal fuel delivery and engine performance. Supplied as a single unit, this sensor is constructed from metal and finished in a silver colour, matching the typical appearance of under-bonnet components.

Features and Construction

This sensor is defined by its compatibility and material build, serving as a core monitoring device within the vehicle's fuel system.

Material and Build

The product information specifies that the sensor is constructed from metal. This material choice provides the necessary durability and heat resistance for a component mounted directly on the engine or fuel rail, where it is exposed to vibration and high temperatures. The metal housing protects the internal sensing element and electrical connections from the under-bonnet environment.

Compatibility and Identification

The primary identifiers for this sensor are the GM part numbers 12616646 and 12677836. These numbers are essential for ensuring the correct fit and function for your specific vehicle application. The sensor is designed to be a direct replacement, meaning it should connect to the existing wiring harness and mount to the standard fuel rail or line fitting without modification.

Uses and Placement

This sensor has a specific technical role within the vehicle's engine management system, with applications in both repair scenarios and routine maintenance.

Engine Management Function

The fuel pressure sensor's core function is to provide real-time data on fuel rail pressure to the vehicle's Engine Control Unit (ECU). This information is vital for the ECU to calculate correct fuel injection pulse width, ensuring efficient combustion, optimal power, and controlled emissions. A faulty sensor can lead to poor engine performance, difficult starting, or increased fuel consumption.

Replacement and Repair Use

This part is primarily used in automotive repair and maintenance. It is the correct component for replacing a failed or failing fuel pressure sensor on GM vehicles that use the listed part numbers. Its use restores accurate fuel pressure feedback to the ECU, resolving drivability issues related to incorrect fuel delivery.

Benefits and Buying Value

The value of this part lies in its specific compatibility and role in maintaining engine performance, rather than subjective premium claims.

Precise Fit and Function

The key benefit is obtaining a component marked with the correct manufacturer part numbers for your vehicle. This eliminates guesswork and ensures the sensor will provide the correct electrical signal and physical fit, which is critical for modern engine management systems. Using the specified part helps maintain the vehicle's designed performance and reliability.

Why Choose This Product

Choose this fuel pressure sensor if you require a replacement part for a GM vehicle identified by part numbers 12616646 or 12677836. It provides the necessary component to address fuel system monitoring faults. The stated metal construction aligns with the requirements for an engine-bay component. The product delivers a solution focused on technical compatibility and restoring system function.