C 1500 Truck 2WD V6-4.3L VIN W (2001)
1. Coat only the threads with GM P/N 9985253 sealer or an equivalent.
NOTE: Refer to Fastener Notice in Service Precautions.
2. Install the ECT sensor in the engine.
Tighten
Tighten the sensor to 20 N.m (15 lb ft).
3. Connect the ECT sensor harness connector.
4. Refill the cooling system. Refer to Draining and Filling Cooling System in Cooling System.