Duramax LLY Thermostat - What You Need to Know
Cracking the Code: Everything You Need to Know About Your Duramax LLY Thermostat Alright, let's talk about something that often gets overlooked until it decides to throw a wrench in your day: the thermostat in your Duramax LLY. If you own one of these fantastic 2004.5-2005 trucks, you know they're beasts of burden, capable of just about anything you throw at them. But like any high-performance machine, they thrive when all their internal systems are humming along perfectly. And right at the heart of your truck's cooling system, silently doing its job, sits the Duramax LLY thermostat. Or, more accurately, thermostats. Yep, this isn't your grandpa's single-thermostat setup; the LLY has a clever dual design, which we'll dive into. ...