Sierra Classic 3500 4WD V8-6.0L (2007)
2. Install the ECT sensor.
Tighten the sensor to 20 N.m (15 lb ft).
3. Connect the ECT sensor electrical connector (5).
4. Refill the cooling. Refer to Draining and Filling Cooling System (Static Fill) Draining and Filling Cooling System (w/RPO HP2) Draining and
Filling Cooling System (Vac-N-Fill).