Getting ready to meet up with the California group this next thursday. My A/C pump sounds a liitle too noisey. Am thinking of stopping at Prevost @ Mira Loma on the way to Tucson. Is there anything I can check or Lube before deciding to have Prevost take a look at it. There is a label near by which talks about checking/ adding Oil but I'm not sure where to add it. Is this best done by a pro? Gary