Here is what we sent to friends heading north a month behind us:
The guad bypass is fabulous! It takes off at about km marker 467, and is labeled Chapala Cuota. The big sign said Libramiento Guadalajara, north of the giant Continental tire. Perfect concrete, no vehicles. It ends at the airport road, south of the airport. You can see that the rest of it is progressing nicely. You must turn right, and continue straight past the airport, until you see the signs for Perifico Sur. That's you. Get on that, and it took us 25 minutes to get off of it at the turn for Tepic.