Parksense is the 4 bumper sensors, the 2009 sensors may be different than the 2010 model, i found this for the 2010 model, i found this on a Mopar site,
http://www.wholesalemopar.com/dodge_accessories.html
https://www.trademotion.com/partlocator/_inc/getGraphic.cfm?graphic=SFPLImage129795.jpg &siteid=1&catalogID=5399
Parkview is the backup camera, here is a quick video
http://www.dodge.com/en/2010/ram_1500/safety_security/parking_assistance/
this comes right from ALLPAR, for the 2009 Ram
ParkSense® Rear Park Assist System: Assists at low speeds in Reverse to detect stationary objects. Consists of visible (interior lights seen with rearview mirror) and audible warnings for the driver. Optional.
ParkView® Rear Back-up Camera: Provides a wide-angle view of the area immediately behind the vehicle, giving the driver greater peace of mind before backing up. Also aids in lining up a trailer to the vehicle’s trailer hitch, when so equipped. The image automatically displays on the navigation screen when the transmission is shifted into Reverse. Optional.
Read more at
http://www.allpar.com/model/ram/dodge/features-safety.html?ktrack=kcplink
My 2009 Ram came with the 4 button sensors & i still made contact with the corner of a building, the signal went off just as i made contact, my dent is almost dead center in the bumper, I went to the dealership & told them to get me a Parkview camera & a Locking tailgate, they had not heard of either of them back in March 2009, then in April, i spotted a Laramie on the sales lot that had it. I told the Service Writer about it, he looked at it, opened the tailgate & took off the access panel, looked at it & took several pictures & then he showed the Parts guy & they ordered my parts
here is a picture of my bumper, you can see the little dent right below the 3 on my license plate
http://img193.imageshack.us/img193/1103/dscf0335g.jpg
this is a picture of my tailgate handle with the Parkview camera & locking tailgate, the locking tailgate is a must, no one can take your whole tailgate or just open it & easily remove your tail lights, sometimes by unplugging them, but, more often by cutting the wiring before the connectors, those connectors are hard to come by
http://img514.imageshack.us/img514/6871/tailgatehandle.jpg