Engine Coolant Temperature Sensor: Notes
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Use care when handling the Engine Coolant Temperature (ECT) sensor. Damage to the ECT sensor will affect the operation of the fuel control system.