What size belt do you run? I bought the car that came with an electric water pump and it seriously looks like the Belt they used is too long and is loose.

 

The stock water pump is not run by the serpentine belt, its gear driven off a gear on the back of the cam sprocket.

Either the stock belt has stretched, someone replaced the stocker with a too long belt, or the tensioner pulley is worn out.

 

Just so you are not confused, the LT1 does not use a belt. The pump is driven by the cam by way of a shaft.

 

What did you find confusing in my explanation?

 

Absolutely nothing. I just didn't read yours. I just jumped on an answer, sorry.