Is The PROM For The 1227747 ECU A One Or Two Piece?

[xJohnDoe001x]

When I buy a PROM for my 1227747 is it one or two chips? The reason I ask is because my ECU has two empty sockets. the problem is that I ordered a whole ECM from Autozon, I thought. the web page wording sounds like I was getting a complete ECM with PROM so I sent in the whole unit as core only to get one without a PROM now I am stuck.

I have a 1990 GMC sierra that originally had a V6 but was swapped out with a 5.7L TBI. It seems that the engine, tranny, and wiring harness was all swapped out together.

I have all the info that was on the sticker on the old unit:
SERV. NO. 1227747 ARJU
86ARJU K302190396
16136301 ARJU

[EagleMark]

That is the way a 1227747 ECM is sent. You keep and swap in your 2 chips.

[Six_Shooter]

The PROM is one piece, plus the CALPAK.

Your best bet is to go to a wreckers and find a matching combination of PROM and CALPAK, to get you up and running again.

The PROM can be dealt with by programming a new EEPROM and using an adapter to make it work. The CALPAK on the other hand is not so easy to deal with.