Autigers35A3- You must not have a military background??
It stands for Operator "Preventive Maintenance Checks and Services (PMCS)" Check out Chapter two of the operators manual, it willl walk you through this stuff step by step, telling you what to check before, during and after operating the vehicle.
From TM 9-2320-386-10:
"The best way to maintain ESP vehicle components covered by this manual is to
inspect them on a regular basis so that minor faults can be discovered and corrected
before they result in serious damage, failure, or injury. This section contains systematic
instructions for inspection, adjustment, and correction of components to
avoid costly repairs or major breakdowns. This is referred to as Preventive
Maintenance Checks and Services (PMCS)."
Happy reading, hope this answers several of your questions.