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Cadillac XT5 Coolant Temperature Sensor sits at the heart of smart engine management, but before exploring it, consider why the Cadillac XT5 has gained so many fans. The XT5 rides on a stiff yet light platform, pairs a lively V6 with an eager eight speed transmission, offers all wheel drive, and surrounds passengers with stitched leather, streaming video mirror technology, and a cargo bay that expands when the rear seats fold, all of which give the Cadillac crossover a blend of luxury comfort and athletic handling that makes daily commutes and weekend trips equally fun. Now, focusing on the Cadillac XT5 Coolant Temperature Sensor, this small thermistor threads into the thermostat housing, samples coolant heat in real time, and sends data to the ECU so the computer can fine tune fuel mix, spark timing, idle speed, and cooling fan activation, which keeps the engine running smooth, clean, and safe from overheating while also triggering a dash light if temperatures climb. A healthy Coolant Temperature Sensor also helps fuel economy, and replacing the Coolant Temperature Sensor prevents rough idles. Because the Cadillac XT5 Coolant Temperature Sensor works constantly, age or contamination can dull its readings, and replacing it restores crisp throttle response and stable temperature gauges. To install a new sensor, park and cool the SUV, disconnect the battery, relieve pressure, unplug the connector, unscrew the old unit, seal and hand start the replacement, tighten it, reconnect wiring, refill coolant, bleed air, and verify correct readings on the cluster.