After replacing all the vacuum hoses I booked an hour of diagnostics with the smog shop and the truck passed smog cleanly. The EGR solenoid vacuum routing confirmed by the techs at the smog shop is as above. "F" as denoted in the vacuum map is not barbed and always subject to clean, filtered...
I just acquired this truck and am sorting it out. It is completely stock. It failed smog in California and when I started looking at all the vacuum lines I found most of the plastic vacuum lines brittle and cracked and I was unable to figure out what went where. The vacuum map on the Frame is...