OEM 2003 GMC Envoy Coolant Temperature Sensor

2003 GMC Envoy Parts Questions & Experts Answers

• Q: How to replace the Coolant Temperature Sensor on 2003 GMC Envoy?

  A: First disconnect the negative battery terminal when replacing an engine coolant temperature (ECT) sensor while the engine is off to prevent battery disconnect problems. Remove coolant until it sits below the ect sensor before unhooking the ect sensor electrical connector . Start by removing the Drive Belt and generator before you safely remove the ect sensor. New sensors or original parts will require thread sealer p/n 12346004 or its equivalent before sensor installation should be performed at 16 n.m (12 lb ft). Complete the ect electrical connector installation process before adding the generator and Drive Belt and reconnecting the negative battery terminal. Then finish by refilling engine coolant. The final torque and operational performance of replacement components depends on using the correct part number while applying specific coatings according to their specified requirements.