Originally Posted by Rink092
I have a 2007 Vectra 40' with a 400hp diesel. Recently I started the coach when I could hear a humming sound coming from the front end drivers side. I opened the front hood and found the humming was coming from some type of vacuum pump?? It has a constant humming that can even be heard from the drivers seat. It obviously never did this before. Has anyone had this issue? Do these pumps go bad often?
Not often... (my vacumm pump is 20 years old in a 147,000 mile coach)...but it can happen.
A vacuum leak which causes the pump to run continually anytime the ignition key is on is a more common problem.