Walker 242-1049 Ignition Knock (Detonation) Sensor

Walker 242-1049 Knock Sensor Overview

Walker Products 242-1049 is an ignition knock sensor built for vehicles that rely on accurate detonation detection to manage spark timing and engine protection. It is a direct-fit style replacement for a wide range of GM applications, including Chevrolet Silverado 1500, Tahoe, and GMC Sierra 1500 models.

Walker Products has supplied fuel system and engine management components since 1946, with manufacturing and engineering support focused on OEM-level specifications. The Walker Products line includes sensors and related engine management parts for service work on Chevrolet, GMC, Cadillac, Buick, Pontiac, Saturn, Hummer, Saab, and Isuzu applications.

Key Features

• Ignition knock (detonation) sensor for engine timing feedback
• Blade terminal design with 2 terminals
• 1 female oblong connector for direct electrical connection
• Male terminal gender
• Mounting hardware included
• No wiring harness included
• Walker Products part number 242-1049

Detailed Description

This Walker knock sensor monitors engine vibration patterns and sends the signal needed for the engine control system to adjust ignition timing when knock is detected. That function is important on GM trucks, SUVs, and performance cars where precise detonation control supports smooth operation and consistent drivability. Part number 242-1049 is listed for many Chevrolet and GMC platforms, including Silverado 2500 HD, Express 3500, and Sierra 2500 HD, along with Cadillac CTS and Chevrolet Camaro applications.

This part cross-references Standard Ignition KS211 for the same application. It is also referenced by NTK ID0300 in interchange listings.

What It Helps Address

• Knock sensor fault codes
• Audible spark knock or pinging under load
• Reduced engine performance from incorrect timing correction
• Check engine light related to detonation sensor circuits
• Rough drivability caused by inaccurate knock feedback

Installation Notes and Fitment

Compatible With 2007-2011 Buick Lucerne, N/A; 2008-2011 Cadillac DTS, N/A; 2008-2010 Chevrolet Impala, N/A; 2008-2010 Pontiac G6, N/A; 2008-2010 Saturn Vue, N/A; 2008-2013 Chevrolet Silverado 1500, N/A; 2008-2013 GMC Sierra 1500, N/A; 2008-2014 Chevrolet Tahoe, N/A; 2008-2014 GMC Yukon, N/A; 2008-2019 Chevrolet Express 2500, N/A; 2008-2019 GMC Savana 3500, N/A; 2010-2015 Chevrolet Camaro, N/A; 2014-2017 Chevrolet SS, N/A; 2020 Chevrolet Express 2500, N/A; 2020 GMC Savana 3500, N/A.

Verify connector shape, terminal count, and sensor location before installation. Use the included mounting hardware where specified by the service procedure, and confirm the electrical connector is fully seated after installation. Because this listing covers multiple GM platforms, compare the original sensor and connector style to the vehicle service information before replacement.

Quality Assurance

Walker Products manufactures engine sensors and fuel system components to meet or exceed OEM standards and specifications. The company is ISO 9001 and IATF 16949 certified, with product management and engineering support used to maintain application accuracy and technical documentation.