After Feb 6th repair, when I removed the transaxle pan and while replacing the filter discovered the disconnected hose (which I reconnected) installed the new filter and closed back up.
It's now Feb 24th and the van has been running fine.
I have no idea what was being carried in the hose but since its been reconnected and had some time to get the air out the problem has gone.
The heater is still slow to warm up so I purchased a thermostate and will wait for a free day to put it on.
As a side note. The Haynes repair manual for "General Motors Chev. Venture, Oldsmobile Silhouette, Pontiac Trans Sport & Montana 1997-2005 All models" identified the part "Vacuum modulator" (pg.7-5) that does not seem to be included on the Montana. I spoke to two local repair shops and they confirmed that it's not part of the Montana. Maybe I'm wrong but it appears Haynes made a mistake.
PS Please send a physical address for me to make my donation. I appreciated your help but I don't feel comfortable sending money via the internet. Thanks.
Tuesday, February 24th, 2009 AT 10:29 AM