Global Parts 1815049 Ignition Knock (Detonation) Sensor

Ignition Knock Sensor for GM Applications

Global Parts 1815049 is an ignition knock sensor that monitors engine vibration patterns and reports abnormal detonation or pre-ignition conditions to the engine management system. It is built with a female oval connector, 2 male terminals, a blade terminal type, and a bolt-on mounting style with wiring harness included.

Key Features

• Knock sensor for detecting unusual engine vibrations caused by detonation or pre-ignition
• Female oval connector with 1 connector and 2 terminals
• Blade terminal design with male terminals
• Bolt-on mounting type for direct installation on the engine block, cylinder head, or intake manifold
• Wiring harness included for the listed applications
• Cross-references Standard Ignition KS512 for the same application

Detailed Description

This Global Parts knock sensor, part number 1815049, is used in engine control systems that rely on vibration feedback to detect abnormal combustion events. By sensing knock at the engine block, cylinder head, or intake manifold, it helps the ECU identify conditions that can affect drivability and engine performance. It is a direct-fit style sensor for select Cadillac, Chevrolet, GMC, and Buick models, including Cadillac CT4, XT4, XT5, XT6, CT5, and CT6, plus Chevrolet Blazer, GMC Acadia, and Buick Envision applications. This part number 1815049 also cross-references Standard Ignition KS512 for the same application.

What It Helps Address

• Knock sensor fault codes related to abnormal vibration detection
• Engine pinging or detonation-related drivability concerns
• Rough running caused by inaccurate knock signal input
• Check engine light conditions tied to knock sensor circuit issues
• Sensor replacement needs on GM vehicles with the listed fitments

Installation Notes and Tips

Verify connector shape, terminal count, and mounting style before installation. This sensor uses a bolt-on mount and a female oval connector, so the harness connection and sensor location should match the original unit. Confirm the application details for your specific Cadillac CT4, XT4, XT5, XT6, CT5, or CT6, as well as Chevrolet Blazer, GMC Acadia, and Buick Envision models before replacement. Part number 1815049 should be matched to the vehicle’s original sensor configuration and any listed notes such as harness or retainer clip requirements.

Quality Assurance

Global Parts supplies this ignition knock sensor as an OE-style replacement for the listed GM applications. The design follows the original sensor function by monitoring engine vibration signals used by the engine control system to detect detonation and pre-ignition.