Looking for a Lean Cruise CAX for OS 12606961

[turbo_bu]

Working on a 2005 K1500 Sierra (5.3L) 1 MB, LS1B, and trying to turn on lean cruise. I looked at the CAX files out there but didn't see one which matched this trucks OS (12606961). Does anyone happen to have a CAX lean cruise file which works with this OS? I am attaching the tune file in hopes that another CAX file might also work with it. There is a OS 12606960 listed, but not quite sure if it will work or not.

One other somewhat odd thing is that the Tune Depot does not list this OS for 2005. For 2005, OS's show up as 12592618.

Thanks,

Darren

[Taz]

2005 OS12606961 is a TIS update for OS12592618. It addresses some potential issues with O2 cold start and some minor customer complaints about transmission shifts.

You could reflash the PCM with OS12592618 and tune from there - this would address the Lean Cruise CAX issue.

[turbo_bu]

Taz,

Thanks for the quick reply. Not knowing enough about the OS's, my take is that the OS I have (which is newer) might contain more than just some calibration differences. If that were the case, I suppose it would be bad to assume that the CAX addresses in 12592618 would be the same in 12606961?

[Taz]

Easiest course of action is to run OS12592618 ......

[Taz]

Had some time to spare today ... attached is the CAX file you need for Lean Cruise in OS12606961.

[turbo_bu]

Taz,

Thanks a million!!!! I will give it a try next week when I get the truck back.

[joecar]

Good deal :cheers: