About 35 psi
Most likely P225/75R15s
The tire pressure is located on a sticker on your door jamb.
30LBS in each tire.
Tire pressure is more dependent on what type of tire you have. If you look on the side of the tire it should actually tell you what the correct pressure is for that specific tire.
The air pressure for many tires is 32 pounds. The sidewall of the tire will be stamped with the correct pressure for the tire.
Most full size cars of that era used P225/75R15-size tires Please note: The tires on my 1969 Buick Electra 225 are 205/70R15 and they are on the factory rims that came with the car.
33 psi
Most tire pressure sensors are built into the valve stems in the wheel. The send a signal to a reciver on the vehicle to monitor tire pressure
32 psi 32 psi pressure
30 psi
look on tire it tells psi this is best way because tires are changed and not always with original equipment so actually verify tire pressure by what is stamped on tire
Press the reset button for about 5 secs while viewing the tire pressure.