New oil pump not pumping oil .Why?

What is your question?

Driving down road car quit taking gas and shut off. water reservoir full not steaming, tryed to start later knocking shut down fast. Towed home checked oil pump wasn't pumping oil. bought new one put on oiled everything, won't pump oil. Do I have to prime it? Is there another problem? Need help asap as we are down to no vehicle to drive. Thanks I appreciate it.

How long has your 2006 Pontiac Torrent had this problem?

A few weeks