Hey czgu,
I thought I had a bad thermostat, so I replaced it. Five hours later, after it was all back together, I tested to see if the heat was working again. It wasn't. I thought that the selenoid had gone bad or something, so I did some searching on this site and came across a boat load of information. So last night I went home and took the radiator cap off and my worst fear came true. Brown gunk inside the radiator. We are going on a trip this weekend and I needed it temporarily fixed, so I took it to a repair shop to have it chemically flushed. I then went to the dealer and made an appointment for when we get back to have the intake gasket replaced. I told them I knew about the "quiet" warranty that I read about in this thread, provided by Pontiac. He said that he has never heard about it. He then asked how many miles are on the van, I said 54K or so. He said that even if there was a warranty, the milage is too high. I think they are BSing. Do you know the specifics about the warranty from Pontiac? That I way I am armed to the teeth if I have to fight it. Thanks!