When I accelerate or decelarate, at times I noticea slooshing sound- a liquid moving back and forth. It is particularly noticeable when sitting in start and stopped traffic. I appears to be water trapped somewhere- I fear it is my heater core, but my heat comes on just fine.

Thoughts?

 

Need to do some research, this is the most common issue posted, you have a coolant leak, go get the truck coolant system pressure tested.

 

search for bleeding on here. You have a leak, and there is air in your system. Do as Mike said and have it pressure tested. It is going somewhere...

 

That's the open beer in the cpholder, hurry and drink it!! [sm=icon_cheers.gif]