1999 cheverlet express van where is the blower motor?

The blower motor in a 1999 Chevrolet Express van is located behind the dashboard, on the passenger side. To access it, you'll likely need to remove parts of the dashboard. This is not a simple job and often requires some mechanical skill. A repair manual specific to your year and model Express van would be very helpful, showing exactly which components need to be removed and how to do it safely.