The thermostat plays a pivotal role in ensuring your diesel engine is operating at proper temperatures. Here are five signs ...

Trucks with a 6.7L Cummins engine have a block heater built in, so if you live in an extremely cold climate, you'll want to know where it's located.

As winter sets in and temperatures drop, a functioning heater becomes a necessity. But what if, instead of warm comfort, your heater blows icy air through the vents, or fails to work altogether?