Ignition Knock (Detonation) Sensor

Part Number 242-1039 (117547696)

UPC: 724620074653

Package contents: 1 Each per Box

Select vehicle for guaranteed fit

Color

$42.54

In stockShips by 6th Nov

Description

Walker Products Ignition Knock (Detonation) Sensors are OE Replacement components that monitor engine vibrations to detect knocking or detonation events. These sensors are a critical part of the engine control system, allowing the ECU to adjust ignition timing in real time to prevent spark knock—a condition that can cause internal engine damage, reduced fuel economy, and drivability issues. Walker Knock Sensors are engineered to match OE specifications for frequency range, sensitivity, and electrical output. Each unit is tuned to detect the specific resonant frequency of knock in a given engine platform, enabling precise spark retard when knock is detected. Built from high-quality, heat- and oil-resistant materials, these sensors are designed to endure the harsh conditions of the engine block and cylinder head. With exact OE fitment, Walker Knock Sensors install directly into the original threaded locations and connect using factory-style electrical terminals. Whether addressing a fault code (e.g., P0325, P0330), correcting timing issues, or replacing a failed sensor, Walker Knock Sensors restore proper knock detection, improve engine safety, and support optimal ignition performance across a wide range of gasoline applications.

Fitment

This part fits the following vehicles.

Buick

2004 Rainier

Cadillac

2004-2005 CTS
2002-2006 Escalade
2003-2006 Escalade ESV
2002-2006 Escalade EXT

Chevrolet

2002-2006 Avalanche 1500
1998-2002 Camaro
1998-2004 Corvette
2003-2007 Express 1500
2003-2007 Express 2500
2003-2007 Express 3500
1999-2006 Silverado 1500
2007 Silverado 1500 Classic
2001-2003, 2005-2006 Silverado 1500 HD
2007 Silverado 1500 HD Classic
1999-2004 Silverado 2500
2001-2006 Silverado 2500 HD
2007 Silverado 2500 HD Classic
2001-2006 Silverado 3500
2007 Silverado 3500 Classic
2003-2004 SSR
2000-2006 Suburban 1500
2000-2006 Suburban 2500
2000-2006 Tahoe
2003-2004 Trailblazer EXT

GMC

2003-2004 Envoy XL
2004 Envoy XUV
2003-2007 Savana 1500
2003-2007 Savana 2500
2003-2007 Savana 3500
1999-2006 Sierra 1500
2007 Sierra 1500 Classic
2001-2003, 2005-2006 Sierra 1500 HD
2007 Sierra 1500 HD Classic
1999-2004 Sierra 2500
2001-2006 Sierra 2500 HD
2007 Sierra 2500 HD Classic
2001-2006 Sierra 3500
2007 Sierra 3500 Classic
2000-2006 Yukon
2000-2006 Yukon XL 1500
2000-2006 Yukon XL 2500

Hummer

2003-2007 H2

Isuzu

2003-2004 Ascender

Pontiac

1998-2002 Firebird
2004 GTO

Features & benefits

Restores Ignition Timing Accuracy: Supports optimal fuel efficiency, performance, and emissions by correcting spark advance during knock conditions.
OE Replacement Sensitivity: Calibrated to match factory frequency response and output for seamless ECU integration and spark control.
Detects Engine Knock: Monitors vibration frequencies to detect detonation and prevent pre-ignition engine damage.
Exact OE Fit: Installs directly into original mounting locations using factory connectors and threads—no modifications required.
Built for Harsh Environments: Engineered to resist heat, vibration, and oil exposure for long-lasting signal reliability.
Direct replacement - this ignition knock sensor is made to match the fit, function and performance of the original equipment on specified vehicles
Ideal solution - engineered to detect vibrations from knock and other combustion problems and replace a knock sensor that has failed
Durable construction - designed and manufactured to strict specifications for reliable performance
Trustworthy quality - backed by a team of product experts in the United States and more than a century of automotive experience

Specifications

Connector Gender	Female
Connector Quantity	1
Connector Shape	Circle
Country Of Origin	CN
Length	54.4800
Mounting Hardware Included	No
Street Legal	Yes
Terminal Gender	Male
Terminal Quantity	1
Terminal Type	Bullet
Threaded End Diameter	10.0000
Wiring Harness Included	No