i have a 2000 blazer, and when its moving i can hear what sounds like water trapped somewhere in the rear of the vehicle. i have been unable to find out what it is. any ideas?

 

LMAO. this has come up before... the last time the thread was called the exact same thing but with Capitals
the last dude that has this was helped by what i found. dont know if it will help you or not, BUT here it is:
Fixy Link
let me know if that helps

 

Yup. This came up about a month ago. Good Luck!