Chrysler Repair: oil pan chrysler 99 town and country, oil pressure sending unit, light thanks

Question
hi
 i need to replace the oil pan on my 99 T&C LXI.  when i went to get one they asked me if my had an oil level indicator.  apparently the pan is different with or without.  how can i tell if i have one or what is the difference in the pans?  i have an oil pressure sending unit on the engine.my owners manual is no help and i never let the oil get low enough to ever trip a warning light.  
                                           thanks
                                              rich

Answer
use the dealer  for this  the oil pans u get from the afterkarket people ask stupid stuff like this and u never know  until u take it home and match it up.  They have generic ones for all makes of cars and such. ANd the oil level thing  hehe  i think would be the dip stick tube.