Newbie... what to get. twin turbo ls build.

[joecar]

Attached is COS5/02020005 file that I run on my stock 2001 TA (everything stock other than long tube headers w/cats).

[jks67ss396]

wheres the AFR vs map/rpm? i cant seem to see that ...

thanks man!

[joecar]

wheres the AFR vs map/rpm? i cant seem to see that ...

thanks man!

In the search box enter B3647 and press Search.

[ searching B3647 (i.e. uppercase) takes you to the table, searching b3647 (i.e. lowercase) takes you to the string "B3647" ]

B3647 is at Engine Calibration->Fuel->Mixture->Commanded Fuel in Open Loop.

[jks67ss396]

Hey guys,

the Serv number is 12582605 and the HDW number is 12580786

Can you let me know if its possible to go drive by cable with this ecm?

thanks

If you have a 2003 LQ4 truck (Sierra / Silverado) tune it is DBW only. The PCM you have MAY support a DBC tune - from an Express / Savana.

Post the service number (Serv #) and hardware number (HDW #) affixed to your PCM and I’ll check compatibility.


Regards,
Taz

[Taz]

Service number 12582605 was a commonly used 1Mb LS1-B style PCM in 2003 Gen III trucks. I believe it will only support DBW tunes.

Some service numbers for 2003 LS1-B PCMs that should support DBC tunes are:

• 12576106
• 12581565
• and no doubt - a few more less “common” service numbers

Any 2003 to 2007 Gen III PCM will work with the BLUE & GREEN PCM connectors of your wiring harness. There are select PCMs from 2003 to 2007 that are DBC compatible.

You could also use any 1999 to 2002 512Kb LS1-B PCM - these are all DBC compatible - but you would have to switch the GREEN PCM connector to a RED PCM connector - and repin the wiring harness as necessary.


Regards,
Taz