Where is a vacuum pump located at on a 2003 Ford F-450? I know it is belt driven but

[daiseydome2002]

can not find it!?
Yes it is diesel, and ford said it is a vacuum pump leak when I explained the problem I am having!

 

[desert camel]

not sure but its electric,link bellow shows what it looks like.

 

[jumbobret]

Is it a diesel engine? Most gasoline engines do not have a vacuum pump. If it is a diesel engine, then it probably has hydro boost pump.