Ours is under the back seat, driver's side
Under the back seat on the other side from the battery.
it is the voltage regulator.
If you are still set up stock you have a separate regulator located under the back seat. Unscrew the mounting screws and unplug, plug the new one in and go! It should on the drivers side under the seat.
A voltage regulator on a Chevy 1973 or newer is built into the alternator.
decode vin 1973 Volkswagen beetle
1973 standard and super beetle
trailer
How I have to do for replace a little bulb on the ODO speedometer cable on 1973 Super Beetle ?
12 volts
10w30 same as a 73 standard beetle
The voltage regulator is located within the alternator. 1973 and up GM used the integral design, 1972 and down GM used a voltage regulator mounted externally.
1600 cc.