Where can I find a replacement PROM for my 88 Celebrity, 2.8 Lt, 6 Cyl, Auto 4Sp

Need the *scan id number* of present prom before we can help. Then it can be cross referenced to the updated prom. You have got to follow a numerical sequence to get the prom .. It’s all about the numbers!

How do I get the prom Id or reference number?

What's a *scan Id number* and could you give me an example (ie. 36 24 36)?

Well those are indeed ‘very good’ numbers - however not what we need (for the car) .. Find an old school ~ experienced mechanic that’s got a Snap-On scan tool - that shouldn’t be too hard to do - have mechanic scan computer and get the *scan id number* for the prom - mechanic has a cross reference booklet to look up the latest and most up to date prom - it also gives the GM part number and what problems the updated prom was issued to correct. Once that number is discovered - the replacement prom can be found. Keep in mind this procedure is used to correct certain drivability issues that are prom related as per TSB ( Technical Service Bulletin) which, as stated, will also be listed in the cross reference booklet. I have said scanner and cross reference booklet - but I’m on the other coast. I’ve also been doing auto repair for a ‘very long time’ - I feel sure you can find a mechanic with similar experience. Good luck!

The poop that I Have is: Part #16141558, Code ASWD 1808, Usage: A19-27 2.8W (LB6), 4-SPD AUTO TRANS (ME9), 3.33R(GX3), CALIFORNIA EMIS(NB2) This from a 2018 GM print out and cross reference. Do I need more? Are you freezing your tush on the other coast?