GM Genuine Parts 213-3521 (12589867) Ignition Knock (Detonation) Sensor

Customers find the ignition knock sensor works well, particularly noting it runs their trucks perfectly and fits the 2001 Tahoe 4.8l SFI engine perfectly. Moreover, the product receives positive feedback for its quality, value, and easy installation process. However, the sensor code and check engine light aspects show mixed results - while some customers report clearing codes and no more check engine light, others experience issues with codes returning and the light coming back on. Additionally, opinions about OEM status are divided, with some confirming it as a genuine GM part while others question its authenticity.