Got that tranny cooler line fixed but now I got white smoke coming from the exhaust pipe. It's not coolant, as it doesn't smell of antifreeze, and a friend told me that he had the same problem once. Turned out the diaphragm in his vacuum solenoid had cracked and was sucking tranny fluid up the vacuum line into his intake. Could this be my issue? If it is, why can't I find a vacuum solenoid for a 1996 B2500? Should I be looking for something else? An EGR Solenoid or EGR Valve?

Any help would be really appreciated.

 

No vacuum lines to the trans, and no EGR on your van. You can look all ya want, but, you won't find 'em.

Let the engine run for a bit, see if the smoke clears off. May just be condensation burning off.