NegraRCSB2X4auto

iTrader: (15)

I'm trying to go to a 2bar os. In the tutorial my OS is not listed so I'm not sure which one I need to use.
currently 12606960 OS. Any help on the COS I need to use to go to a 2 bar would be greatly appreciated.This is on an 04 returnless silverado. thanks in advance.

nonnieselman

iTrader: (10)

not sure on that,, can you find a 2004 stock tune with an upgradable OS?

holdencrazy.com

im not around my tuning laptop so im not much help right now

NegraRCSB2X4auto

iTrader: (15)

this is all i have to go by.

GM Stock Operating System
EFILive Custom Operating System

2004
12509967
040300xx
12583506
040800xx
12587604
041100xx
12588804
041200xx
12591347
041300xx
12592433
041400xx
12585950
040729xx
12587603
040730xx
12592425
040731xx


2005
12592618
051200xx
12593555
051300xx

NegraRCSB2X4auto

iTrader: (15)

got the OS working now. Now I need to know if I need to make any changes to the new OS. I put the two bar map in and made the Map sensor scaler change to read correctly. Will this OS know if it has a 2bar map or a 3bar map. If not point me in the right directions to how and where I would make these additional adjustment. I have not found anything that's says that. If anything a link would be helpful because the tutorial says nothing really about that.

BLK02WS6

iTrader: (2)

If you put the correct scaler in (verified by kpa reading the same during key-on-engine-off as it did with the 1 Bar sensor and OS), then it is good to go - the scaler is what tells the OS which sensor it is... If you need any more help, let me know.

NegraRCSB2X4auto

iTrader: (15)

thanks

I'm sure i will.