This guide details the replacement of the Coolant Temperature Sensor (CTS) on 1999-2007 Chevrolet Silverado trucks. It covers locating the sensor on cylinder head number one, disconnecting the battery for safety and ECU reset, and using a 3/4 inch socket for removal. Proper installation involves quick replacement to minimize coolant loss and torquing to 17 ft-lbs, with a reminder that new sensors often have pre-applied thread locker. The process concludes with refilling coolant and bleeding the system by running the engine with the cap off.
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