Engine Coolant

[DarkHaze]

It doesnt happen all the time and it hasnt happened in the last week or so. but Ive been getting a low coolant warning when i turn on my truck. Hopefully i dont sound like too much of an idiot but I cant find where the coolant reservoir is. Anyone have a pic of the engine bay and can point it out to me?

Thanks

[Tomaz]

On the 4.4 its just to the left of the radiator. There should be a photo in your manual too. If the coolant is not low, the coolant level sensors are known to fail too. For the future, have your mechanic "show you around" your engine bay so you can become familiar with all of the serviceable items under the hood. Good luck