The Walker Products Ignition Knock (Detonation) Sensor (part number 242-91023) is a direct-fit replacement for 1990-1997 Cadillac, Chevrolet, GMC, and Pontiac vehicles with 5.7L, 4.3L, and 7.4L engines. Walker Products Knock Sensors are OE Replacement components that detect engine detonation to help the ECU adjust timing and prevent internal engine damage.
Features:
- Exact OE Fit: Installs directly into original mounting locations using factory connectors and threads—no modifications required.
- OE Replacement Sensitivity:Â Calibrated to match factory frequency response and output for seamless ECU integration and spark control.
- Detects Engine Knock:Â Monitors vibration frequencies to detect detonation and prevent pre-ignition engine damage.
- Restores Ignition Timing Accuracy:Â Supports optimal fuel efficiency, performance, and emissions by correcting spark advance during knock conditions.
- Built for Harsh Environments:Â Engineered to resist heat, vibration, and oil exposure for long-lasting signal reliability.
Specifications:
| Number of Terminals | 1 |
| Connector Type | Bullet |
| Connector Shape | Circle |
| Connector Gender | Male |
| Terminal Gender | Female |
Fits: 1990-1997 Cadillac, Chevrolet, GMC, and Pontiac models including Fleetwood, Astro, Blazer, C1500, C1500 Suburban, C2500, C2500 Suburban, C3500 and more — 5.7L, 4.3L, and 7.4L engines.
Confirm the year, make, model, and engine against your vehicle before ordering. Full application data is shown in the fitment lookup on this page.
Interchanges With: Forecast KS30, Duralast SU169DG, Hella 613-03, NTK ID0112, Delphi AS10016, General Motors 10456031, General Motors 10456549, KEM 144-408 and 8 more
WARNING: This product can expose you to chemicals, including lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm.
