OEM 2004 Buick LeSabre Knock Sensor

2004 Buick LeSabre Parts Questions & Experts Answers

• Q: How to replace Knock Sensor (KS) 1 on 2004 Buick LeSabre?

  A: First turn OFF the ignition system before proceeding to replace Knock Sensor (KS) Number 1 while handling the hot engine coolant because the remaining coolant in the engine water jacket will cause severe burns. Start by draining the cooling system then hoist the vehicle into position. Unplug the electrical connector from the knock sensor before removing the sensor from the front surface of the engine block. You should refrain from using thread sealant on the sensor threads since the sensor comes pre-coated at the factory which would reduce its detonation detection capabilities. Position the knock sensor into the engine block and complete tightening by using 19 N.m (14 lb ft) torque. Secure the electrical connector on the knock sensor before lowering the vehicle while completing the cooling system procedure.