PPS = Passenger Presence System. This engages the passenger airbag. I need to get mine back out to my interior guy. We are going to pull the PPS from the old, and install on the new so the BCM is happy. Yeah, I'll get some pics. Currently, I pulled the large roof rack off, as the wind noise was killing me. So, I'm making some new mount brackets to place my 2 x 100W solar panels on the roof. I had one mounted in the previous rack, but the new will be much lower profile, and I'll have 2. The cross members are 1/8" thick x 1 1/2" square Aluminum tubing. I'll have on each side of each panel and will span the width of the roof. This will be dam strong. I should still be able to use the top side to throw kayaks, flat lumber, etc., over the panels if I need.