The Walker Products Ignition Knock (Detonation) Sensor (part number 242-91016) is a direct-fit replacement for 1987-1995 Buick, Cadillac, Chevrolet, and GMC vehicles with 2.5L, 3.3L, and 2.2L 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.
- Built for Harsh Environments:Â Engineered to resist heat, vibration, and oil exposure for long-lasting signal reliability.
- Detects Engine Knock:Â Monitors vibration frequencies to detect detonation and prevent pre-ignition engine damage.
- OE Replacement Sensitivity:Â Calibrated to match factory frequency response and output for seamless ECU integration and spark control.
- Restores Ignition Timing Accuracy:Â Supports optimal fuel efficiency, performance, and emissions by correcting spark advance during knock conditions.
Specifications:
| Number of Terminals | 1 |
| Connector Type | Bullet |
| Connector Shape | Circle |
| Connector Gender | Male |
| Terminal Gender | Female |
Fits: 1987-1995 Buick, Cadillac, Chevrolet, GMC, and Oldsmobile models including Century, Commercial Chassis, Electra, LeSabre, Park Avenue, Reatta, Regal, Riviera and more — 2.5L, 3.3L, and 2.2L 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 KS27, Volvo Penta 3850357, Volvo Penta 22024631, Volvo Penta 38503579, Duralast SU150DG, Carquest 71-6538, Carquest 71-6520, NTK ID0115 and 26 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.
