If your radiator fan is running constantly, your temperature gauge is acting strange, or you’ve got a check engine light related to engine temperature, your coolant temperature sensor may be the culprit. In this guide, I’ll walk you step-by-step through how to replace the coolant temperature sensor on a 2015 Chevy Tahoe 5.3L. This is a straightforward DIY repair that can save you a few hundred dollars. You can see a video on the repair here: Symptoms of a Bad Coolant Temperat