OEM 2003 Buick Park Avenue Coolant Temperature Sensor

2003 Buick Park Avenue Parts Questions & Experts Answers

• Q: How to replace the Coolant Temperature Sensor on 2003 Buick Park Avenue?

  A: The first step to replace the Engine Coolant Temperature (ECT) sensor requires a complete ignition shutdown followed by drain of coolant until it sits below ECT sensor level. The procedure requires you to disconnect the electrical connector from the sensor before you remove it carefully. Always use GM P/N 9985253 sealer or equivalent but be cautious when doing so to prevent damage to the coolant sensor which could trigger fuel control system problems. Tighten the ECT sensor to 20 N.m (15 lb ft) after install. After sensor connection and cooling system refilling proceed with ECT harness installation. Verify proper part numbers in replacement parts during installation along with appropriate use of thread locking compounds and lubricants and corrosion inhibitors and sealants because they will affect torque and operational characteristics of installed components.