This is the illustration shown in the assembly manual for the hazard warning **** for the '72 Supreme.

Note that it lists nothing about two separate ***** being used for the model year.

So, why does Fusick show these two in their catalog as being the correct ones depending on when during the model year the car was built?

 

Because they are aftermarket reproduction parts and not GM parts?

 

Here's more to add to the mystery...this is a link from eBay...
https://www.ebay.com/itm/HAZARD-FLAS...sAAOSwm4Na-L7h

And one more...
https://www.ebay.com/itm/1967-1968-1...4ded%7Ciid%3A1

...and another...
https://www.ebay.com/itm/1967-1968-1....c100930.m5375

I don't understand 🤔🤔🤔???

 

Just a guess but 5 divisions making millions of cars maybe they used multiple suppliers with variations between the divisions.

 

My 70 has the top one pictured. The eBay add for the one like the bottom picture says for models with tilt. The assembly manual has the GM part number 411525 which matches this eBay add for a corvette ****. Maybe that’s what 72 used.
https://www.ebay.com/itm/1972-1977-Corvette-Flasher-****-Traffic-Hazard-GM-411525/392950412450?hash=item5b7dab74a2:gzMAAOSwNgZfZz1 0

I also have one in my parts bins like this one. It is a two piece one with a separate screw and a spring but I’m not sure what it came off originally.
https://www.ebay.com/itm/OER-Hazard-...0f7f%7Ciid%3A1

 

411525 is the style I currently have. Is it possible they used three different ones?

 

Dave - It's possible they used seven or eight different ones - you haven't found the rest of them.

 

The lower one was used on the '71 Corvette with a tilt column.

Randy C.

 

As has been noted, it's possible they had 100 different styles.

People have to remember that, back when these cars were built, no one cared in the slightest about anyone 50 or 60 years later wondering if the "correct" parts were used when these cars were assembled. The goal was to get the cars built and out the door. No one cared in the slightest, I'm sure, that all of the hazard warning buttons matched. As long as there WAS a hazard warning button is all that mattered.

I'm always reminded of a story from some years ago, and I think I read it on this site, from a fellow who worked on the Olds assembly line when 442s were built back in the day. He was at a car show where two guys were looking in the trunk of a 442 and arguing over whether or not a particular bolt was correct. This fellow told a story of one time, near the end of a shift, they ran out of a particular bolt on the line. Someone was sent to the nearest hardware store to buy a couple of boxes of bolts in the correct size so they could finish the production run. These new bolts were not identical in appearance to the ones they had been using, but they fit and worked, and that's ALL that mattered. They had to get the cars built and out the door, and they did it however necessary. No one worried about anyone arguing over whether a particular bolt or any other part was exactly correct so that two guys wouldn't have to argue about it 50 years later. This story could probably be repeated many times for other minor parts on these cars.