Probably the old style. I didn't change it. Is there a different one for the led lights?? Woukd this make a difference. If so, why only on one side.
Yeah, they are the right bulbs. I swithched them with each other for the heck of it and still the same. Hit the brake, right turn signal on, no brake light. Left turn signal on, brake lights work okay.?????? I'm not sure what else to do. Replace the whole turn signal switch. Not sure what kind of a job that is. It don't look to easy. I don't know.did you check the number on the bulb. you could have the wrong type bulb. Contacts on bulb may not line up. Hope this help.
By the way, that year chevelle you have, the parking light does go out when you pull to the second click for the headlights.
I'm not to sure but 68 on up the parking light stays on all the time.