Walker 242-91031 Ignition Knock (Detonation) Sensor - Left or Right

Ignition Knock Sensor Overview

Walker Products FSK ignition knock sensor 242-91031 is built for direct replacement applications across select Chevrolet and GMC vehicles. It is used in engine management systems that monitor detonation and help the ECU adjust timing based on knock signals.

Key Features

• Direct replacement knock sensor for select GM applications.
• Fits in-cylinder-head applications where specified in the fitment data.
• Supports engine knock detection for accurate timing control.
• Walker Products FSK line for engine sensor applications.
• Part number 242-91031 for application matching and catalog lookup.

Detailed Description

This Walker Products ignition knock sensor is listed for 1992-1996 Chevrolet and GMC applications, including Chevrolet Astro, Blazer, S10, G30, G10, G20, C1500, C2500, K1500, K2500, and GMC Safari, Sonoma, Jimmy, C1500, C2500, G1500, G2500, G3500, K1500, K2500, and P3500. Fitment includes left, right, and N/A positions depending on the vehicle, and several listings note cylinder-head mounting. The 242-91031 part number should be matched to the exact vehicle and position shown in the fitment table.

Walker Products has supplied fuel system and engine sensor components since 1946 and states that its products are manufactured to meet or exceed OEM standards and specifications. The Walker Products FSK line focuses on engine management parts, making this sensor a practical choice for restoring proper knock-signal input on the listed Chevrolet and GMC platforms.

This part cross-references Standard Ignition KS39 and Gates 29034 for the same application.

What It Is Used For

• Replacing a failed knock sensor that can trigger timing-related drivability issues.
• Restoring knock detection when the engine control system loses accurate signal input.
• Addressing diagnostic trouble codes related to detonation sensor performance.
• Correcting rough running or spark timing changes caused by sensor faults.

Installation Notes and Tips

Verify the exact year, make, model, and position before ordering. Some applications are listed as cylinder-head mounted, while others are position-specific left or right. Match the OE reference shown in the fitment notes when applicable, and confirm connector and mounting style against the original sensor.

Quality Assurance

Walker Products states that its parts are manufactured to meet or exceed OEM standards and specifications. The company is ISO 9001 and IATF 16949 certified and supports its products with manufacturing, engineering, and technical documentation resources.