Walker 225-1556 Manifold Absolute Pressure Sensor

Walker Sensor Only MAP Sensor 225-1556

Walker Products Sensor Only MAP Sensor 225-1556 is an OE replacement manifold absolute pressure sensor built to measure intake manifold pressure and send accurate data to the engine control module. That input helps the ECM calculate engine load and manage fuel injection and ignition timing for consistent drivability, fuel economy, and emissions control.

Key Features

• Manifold Absolute Pressure (MAP) sensor for engine load measurement
• OE replacement design with electrical output, pressure range, and connector fit matched to factory requirements
• Black connector with oval shape, 1 connector, 4 blade terminals, female connector gender, and male terminal gender
• Plug-in fitment with 1 port and plastic body construction
• Built for high engine bay temperatures, vibration, and intake air contaminants
• Walker part number 225-1556 for direct reference during ordering and service

Detailed Description

Walker Sensor Only is the product line for replacement sensors that focus on factory-style fit and signal accuracy. This MAP sensor is engineered to integrate with the vehicle’s existing engine management system and deliver the pressure data the ECM uses to adjust performance and emissions-related operation. For drivers and technicians servicing a Buick Encore GX, Cadillac CT4, Cadillac CT5, Cadillac XT4, Cadillac XT5, Chevrolet Blazer, Chevrolet Silverado 1500, GMC Acadia, or GMC Sierra 1500, part number 225-1556 provides a direct replacement option for the listed applications.

This part cross-references 55493483 for the same application.

Common Issues This Part Can Address

• Check engine light related to MAP sensor performance
• Rough idle or unstable engine operation
• Poor throttle response or reduced power output
• Incorrect fuel delivery caused by inaccurate manifold pressure readings
• Emissions performance concerns tied to faulty sensor input

Installation Notes and Tips

Verify connector shape, terminal count, and port configuration before installation. This sensor uses a black oval connector, 4 blade terminals, and a plug-in design, so matching the factory connector is important for proper fit. Confirm the vehicle application by year and model before replacing the original sensor, and inspect the intake tract and electrical connector for contamination or damage during service.

Quality Assurance

Walker Products designs this MAP sensor to OE specifications for output, pressure range, and connector fit, with testing focused on accuracy, responsiveness, and long-term reliability. It is built for use in modern gasoline and diesel engine management systems where precise manifold pressure data is required.

Compatible Vehicles

• Fits 2020 Buick Encore GX, Sensor Only
• Fits 2020 Cadillac CT4, Sensor Only
• Fits 2020 Cadillac CT5, Sensor Only
• Fits 2019-2020 Cadillac XT4, Sensor Only
• Fits 2020 Cadillac XT5, Sensor Only
• Fits 2020 Chevrolet Blazer, Sensor Only
• Fits 2019-2020 Chevrolet Silverado 1500, Sensor Only
• Fits 2020 GMC Acadia, Sensor Only
• Fits 2019-2020 GMC Sierra 1500, Sensor Only
• Fits 2019 Cadillac CT6, Sensor Only