Knock Sensor (KS): Notes
WARNING: This page does not describe the selected car, but rather 29 other vehicles, including the 1999 Pontiac Montana, 1999 Oldsmobile Silhouette, 1999 Oldsmobile Bravada, 1999 GMC Yukon, and 1999 GMC Sonoma. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Cooling system may require draining prior to removing knock sensor.