I am arriving on a Lufthansa flight from Munich to Vancouver where I will be connecting to SFO on United. On my Lufthansa flight will I be getting a Customs Form or do I go to the Automated Passport Control Kiosk and swipe my passport and enter the questions on the kiosk?

How do I bypass Canadian Customs and go directly to the US Transborder Control? Do I need to retrieve my checked luggage and check it back in after customs like on a US flight or will my bag be automatically transferred to my United flight? I have over 2 hours to make the connection so I was wondering fi I have time to use the Plaza Premium Transborder Lounge at YVR?

Thanks for the info as this is my first time pre-clearing. BTW I'm arriving on a Wednesday in May around 4 PM.