There were 3 versions of the coilpak sticker for the 86-87 turbo buicks.
In the pic below...
early build 86 TB's (August 1985 to early 1986(?)) used the square shaped sticker.
later build 86 TB's used the white rectangular sticker that Kirban's sells.
87 TB's used a similar white rectangular sticker but had the text "N
o" before the number.
View attachment 304336
Kirban's is the only vendor to have any of these original labels. The sequential numbered stickers in my pic are from Kirban's. Aside from anyone reading this and/or remembering this info, I doubt there would be very many folks to tell you that a coilpak sticker from Kirban's without the "N
o" text is not correct for an extended production run GN built in Nov '87. Today, the absence of a coilpak sticker would be more noticeable. For $3, it is a pretty good find.
When I was researching sequential build numbers for 86-87 TB's for correct window stickers, I gathered build data for a few hundred cars. While I don't have exact data for a late Nov build, I have some info for you.
A hardtop GN build about September 28, 1987 (last six of VIN = 458407) had coilpak sticker number 57475.
A hardtop GN built a few days later (VIN ending 459140) had coilpak sticker number 54766.
My GN was built Sep 11 and has coilpak sticker 39341.
coilpak date code sticker....
there was a guy who supported this community making these and other stickers. I helped him get the size, font and other details correct for these date code stickers. Then, about 10 years ago, there was a huge pissing contest brought about by one vendor who protested the sale of non-GM licensed products. As a result, things got messy and this person had to stop making stickers. If you can wait, I'll try to contact him to ask. No one else made a date code sticker let alone one with a specifically requested date.
In the meantime, why not get a couple of stickers from Kirban's. Good to have a spare or two. When he eventually sells out, there are no more originals.