Walker 256-1028 Engine Oil Pressure Switch

Engine Oil Pressure Switch Overview

Walker 256-1028 is an OE replacement engine oil pressure switch built to monitor lubrication system pressure and send the correct signal to the ECU or dash warning circuit when pressure drops below safe limits. It is a direct-fit replacement for a wide range of Chevrolet, GMC, Buick, and Cadillac applications, including Camaro, Colorado, Malibu, Canyon, and Equinox models.

With OE-matched thread size, terminal layout, and electrical response, this switch installs in the factory location and connects to the existing harness without modification. Walker 256-1028 is built for consistent oil pressure monitoring in vehicles that rely on an accurate warning signal to protect the engine.

Key Features

• OE replacement engine oil pressure switch
• Monitors oil pressure and triggers warning output when pressure falls below safe limits
• Matches OE specifications for pressure threshold, thread size, terminal type, and electrical response
• Metal and plastic construction with black finish
• Blade pin terminal design with 1 female connector and 3 male terminals
• Direct-fit installation at the factory mounting location
• Built for Chevrolet Camaro, Colorado, Malibu, Equinox, Traverse, Impala, and related GM applications
• Part number: 256-1028

Detailed Description

Walker Products 256-1028 is engineered as a replacement oil pressure switch for GM vehicles that depend on a precise pressure signal for engine protection and dashboard warning operation. It is designed to match the original switch’s electrical behavior so the ECU or instrument cluster receives the correct input when oil pressure changes. This makes it a practical service part for Chevrolet Colorado, GMC Canyon, Buick Envision, Cadillac CTS, and other listed applications.

The switch uses high-temperature, oil-resistant materials to maintain stable performance in the engine bay. Its OE-style fit allows it to thread into the original location, typically the engine block or oil filter housing, while the factory connector plugs in directly. Walker 256-1028 is a direct replacement for vehicles that need accurate oil pressure monitoring, including 2013-2023 Chevrolet Malibu, 2016-2023 Chevrolet Camaro, and 2015-2022 Chevrolet Colorado applications.

Common Issues This Part Can Address

• Oil pressure warning light flickering or staying on
• False low-oil-pressure alerts
• No warning signal when actual oil pressure drops
• Intermittent gauge or ECU oil pressure input
• Faulty switch readings after engine service or repair

Installation Notes and Tips

Install the switch in the original threaded port and verify the connector style matches the factory harness before installation. Because this part uses OE-style thread size and terminal configuration, it is designed to replace the original unit without wiring changes. Confirm the vehicle application by year, make, and model before ordering, especially on GM platforms where multiple oil pressure switch variants may exist.

Compatible With 2013-2023 Chevrolet Malibu, 2016-2023 Chevrolet Camaro, 2015-2022 Chevrolet Colorado, 2015-2022 GMC Canyon, 2018-2020 Chevrolet Equinox, and other listed Buick, Cadillac, Chevrolet, and GMC applications. This part cross-references GM OE 12661808 for the same application.

Quality Assurance

Walker manufactures this oil pressure switch to OE replacement standards for fit, terminal layout, and electrical response. The design uses materials selected for heat and oil exposure in engine environments, supporting reliable pressure signal operation across the listed GM fitments.