OEM 2003 Buick LeSabre Knock Sensor

2003 Buick LeSabre Parts Questions & Experts Answers

• Q: How to replace the Knock Sensor (KS) 2 on 2003 Buick LeSabre?

  A: Before starting the Knock Sensor (KS) 2 replacement procedure turn off the Ignition Switch and securely lift the vehicle after following all necessary safety procedures. Remove the splash shield bolts to drain the cooling system while remembering that hot engine coolant can lead to severe burns since the Knock Sensor removal will drain engine water jacket coolant. Begin by unscrewing the two bolts from the Knock Sensor heat shield which resides below the freeze plug or block heater (if your vehicle has them) then disconnect its electrical connector before taking the Knock Sensor out from the engine block. For installation, place the new Knock Sensor into the engine block without applying thread sealant, as the factory coating is sufficient for detonation detection; tighten the Knock Sensor to 19 n.m (14 lb ft). Begin by securing the Knock Sensor heat shield with tightening bolts to 60 n.m (44 lb ft) and then reconnect the electrical connector to the Knock Sensor before installing the splash shield. After lowering the vehicle you must fill the cooling system then check the coolant level.