my bad on the needing a class a cdl to only tow 10,000 lbs. it is 10,000 lbs but when total gvwr is over 26,000 lbs. like was stated. here are the rules i found that might help. click the website link below and go down a bit on their page or i just copied it here below.
PENNSYLVANIA CDL TEST | CDL License FAQs | Get Your CDL (Best)
When do I need a Pennsylvania CDL instead of my regular Pennsylvania Drivers License?
A Pennsylvania CDL is required if you operate any of the following CMV's . . .
1. A vehicle with a manufacturer's gross vehicle weight rating (GVWR) of more than 26,000 lbs.
2.
A vehicle towing a unit with a manufacturer's GVWR of more than 10,000 lbs. when the GCWR exceeds 26,000 lbs.
3. A vehicle used to . . .(a.) carry 15 or more passengers (excluding the driver), or (b.) carry (15) or less people (including the driver) when carrying children to or from school and home regularly for compensation.
4. A vehicle carrying hazardous materials in amounts requiring placarding.