Updated prom for ecm
 

Has anyone heard of an updated Prom for ecm for an 85 T/A, 305 TPI which is number 1227741?? If so, please forward any info you know about it PLEASE!!

Re: Updated prom for ecm
 

Not sure what that number is but the ecm service number is a 1226870.
I far as I know there was not any bulletin on and updated bcc for 85.

Re: Updated prom for ecm
 

If you have a 1227747 ecm someone has swapped in a truck tbi ecm.

Re: Updated prom for ecm
 

I just searched hll code gm s/b 85-6
http://chevythunder.com/prom_bcc_1985.htm
Gm part 01227741
https://cimg0.ibsrv.net/gimg/www.thi...31d57e2f50.jpg

Re: Updated prom for ecm
 

Please excuse my ignorance on this. Does that mean it is an updated prom, and should be something I should be getting, or, is there a better suggestion?? BTW, thanks for your replies!

Re: Updated prom for ecm
 

I have the original prom that came in the car. My mechanic told me this was an update for the original.....

Re: Updated prom for ecm
 

You would need the previous bcc to see if the hll is a superceeded part.

Re: Updated prom for ecm
 

Where might I find those?

Re: Updated prom for ecm
 

It would be the three letters on the previous prom

Re: Updated prom for ecm
 

Thanks! Any addtl info is greatly appreciated!!