1968 2 bulb vs. 1 Bulb Parking Lamps

Q: 1968 2 bulb vs. 1 Bulb Parking Lamps

Figure 12-7 in the Pontiac Service Manual shows the bulb as LH (or RH) PARK & DIR. SIGNAL LAMP. It also shows marker lamps, but this seems to be an error since the assembly wraps around the corner of the car to serve as both the parking and marker lamps.

I am trying to figure out what type of parking lamp is correct for my 1968. I have also heard there is a one bulb version and a 2 bulb version. What is correct and what is the difference?

A: …Actually, there were 2 types of 1968 Firebrd Parking Lamps. One type had a single bulb, another had two bulbs. 2 bulb is very early 68. Only for a couple of months of production

A: The two-bulb parking lights had one bulb that was a parking lamp and the second side-facing bulb was a cornering light. I saw a factory option list that had this as an option. The parking lights on my 1968 have the wrap-around lens and only one front-facing bulb. This seems like a reasonable thing seeing how there was a distinctly different harness for the two-bulb versus the one-bulb lights