Threeband
The M1 Does My Talking
Open Carry
You can drive with/transport a handgun if you have a valid permit from any other state.
RV/Car Carry Without a Permit/License
Notice: You can’t carry a firearm in a vehicle unless you have a permit issued by Pennsylvania or any other state. Open carry is legal in Pennsylvania without a permit but you must have a permit to carry a firearm in a vehicle. See (11) and (15) below in statute Title 18 § 6106 below.
From the PA State Police FAQs.
Are there exceptions to carrying a firearm without a Pennsylvania License to Carry?
A License to Carry Firearms is issued to carry a firearm concealed on one’s person or in a vehicle within this Commonwealth. Any person who carries a firearm concealed on or about his person except in his place of abode or fixed place of business without a valid and lawfully issued license commits a felony of the third degree.
A person who is otherwise eligible to possess a valid license under this chapter but carries a firearm in any vehicle or any person who carries a firearm concealed on or about his person, except in his place of abode or fixed place of business, without a valid and lawfully issued license and has not committed any other criminal violation commits a misdemeanor of the first degree.
Title 18 § 6106 Firearms Not to be Carried Without a License
(1) Except as provided in paragraph (2), any person who carries a firearm in any vehicle or any person who carries a firearm concealed on or about his person, except in his place of abode or fixed place of business, without a valid and lawfully issued license under this chapter commits a felony of the third degree.
(2) A person who is otherwise eligible to possess a valid license under this chapter but carries a firearm in any vehicle or any person who carries a firearm concealed on or about his person, except in his place of abode or fixed place of business, without a valid and lawfully issued license and has not committed any other criminal violation commits a misdemeanor of the first degree.
(b) Exceptions.--The provisions of n (a) shall not apply to:
(11) Any person while carrying a firearm in any vehicle, which person possesses a valid and lawfully issued license for that firearm which has been issued under the laws of the United States or any other state.