Walker 242-1361 Ignition Knock (Detonation) Sensor

Brand	Walker 242-1361
Terminal Type	Pin
Connector Quantity	1
Connector Shape	Oblong
Terminal Quantity	2
Connector Gender	Female
Terminal Gender	Male
Product line	Sensor Only
Fits	Chevrolet, GMC, and Oldsmobile · 5 vehicles

OE replacement. Matches factory fit and electrical connections for direct installation.

Engineered to OE specs. Tuned for precise knock detection and real-time timing control.

Heat- and oil-resistant. Built to handle harsh engine conditions.

$41.90Free shipping

In stock · usually ships same day before 1pm CST

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Ignition Knock Sensor for OE Replacement

Walker 242-1361 is a Sensor Only ignition knock sensor built for OE-style replacement on select 2002 Chevrolet Trailblazer, Trailblazer EXT, GMC Envoy, GMC Envoy XL, and Oldsmobile Bravada applications. It monitors engine vibration and sends the signal the ECU uses to adjust ignition timing when knock is detected.

Key Features

OE replacement knock sensor tuned for the correct resonant frequency and electrical output
Pin terminal design with 1 female connector, 2 male terminals, and an oblong connector shape
Heat- and oil-resistant construction for engine block and cylinder head environments
Direct-fit replacement for factory threaded sensor locations
Supports accurate spark retard control when detonation is detected

Product Details

Walker Sensor Only line focuses on direct replacement sensors that match factory specifications for fit and signal behavior. Part number 242-1361 is engineered for precise knock detection on the listed 2002 GM and Oldsmobile platforms, helping the engine control system respond quickly to spark knock and detonation events. This part cross-references AC Delco (e.g., 213-352, 213-353) for the same application.

What It Helps Address

Knock sensor fault codes such as P0325 or P0330
Audible spark knock or detonation under load
Incorrect ignition timing response from a failed sensor signal
Reduced fuel economy caused by improper timing correction
Drivability concerns related to engine knock detection

Installation Notes

Fits 2002 Chevrolet Trailblazer, N/A. Fits 2002 Chevrolet Trailblazer EXT, N/A. Fits 2002 GMC Envoy, N/A. Fits 2002 GMC Envoy XL, N/A. Fits 2002 Oldsmobile Bravada, N/A. Verify the connector style, terminal count, and threaded mounting location before installation. Use the factory electrical connection and follow the vehicle service procedure for torque and sensor placement.

Quality Assurance

Walker builds this knock sensor to OE specifications for frequency range, sensitivity, and electrical output so it matches the original engine management strategy on the listed applications.

This part fits 5 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Liters	Cylinders	Notes
2002	Chevrolet	Trailblazer	4.2L	L6	Sensor Only
2002	Chevrolet	Trailblazer EXT	4.2L	L6	Sensor Only
2002	GMC	Envoy	4.2L	L6	Sensor Only
2002	GMC	Envoy XL	4.2L	L6	Sensor Only
2002	Oldsmobile	Bravada	4.2L	L6	Sensor Only
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