Silva shot 153 (76-77) in the opening two rounds, currently tied with Heather Fegley for ninth place. Silva is just three strokes off the lead.
CBU posted a 653 on the first day of play, opening with a 324 and then shooting a 329 in the afternoon.
No. 7 Grand Canyon sits in first place after the first 36 holes with a 311 (304-307) and host No. 24 CSUMB is in second place at 618 (308-310).
Courtney Soekland of CSUMB and Lyra Yoe are tied for the tournament lead at a six over 150.
The final round begins tomorrow at 8 a.m.