The Walker Products Ignition Knock (Detonation) Sensor (part number 242-91051) is a direct-fit replacement for 2000-2005 Cadillac, Chevrolet, GMC, and Oldsmobile vehicles with 4.6L, 4.3L, and 4.0L 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:
- 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.
- OE Replacement Sensitivity:Â Calibrated to match factory frequency response and output for seamless ECU integration and spark control.
- Exact OE Fit: Installs directly into original mounting locations using factory connectors and threads—no modifications required.
- Built for Harsh Environments:Â Engineered to resist heat, vibration, and oil exposure for long-lasting signal reliability.
Specifications:
| Number of Terminals | 2 |
| Connector Type | Blade |
| Connector Shape | Rectangle |
| Connector Gender | Male |
| Terminal Gender | Female |
Fits: 2000-2005 Cadillac, Chevrolet, GMC, Oldsmobile, and Saturn models including DeVille, Eldorado, Seville, Astro, Blazer, Express 1500, Express 2500, S10 and more — 4.6L, 4.3L, and 4.0L 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 KS62, Duralast SU1333DG, Wells SU1333, SMP KS115, BWD S8697, General Motors 21024729, General Motors 21024981, Airtex 5S2166 and 2 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.
