Do you know if YOUR car had the TSB for resetting the OLM performed?
Yes, it has the latest ECM calibration file for engine operation.
CaddyFred, OIC reprogramming ? I do not know, but car had all the recalls when I bought it and I have had it to the caddy dealer 5 times since last June and they would have done any updates if needed.
I asked because I saw significant variance in owner reported oil life percentages and wonder if this is related to ECM programming. There are actually 4 different ECM calibration files that change the oil life monitoring program. I have verified that I have the latest.
Part Number CVN Description
C1FDF065 New calibration to enhance the operation of the engine oil life monitor to more accurately identify the required oil change interval.
12644358 CC483102 New calibration to enhance the operation of the engine oil life monitor to more accurately identify the required oil change interval.
12641240 0692B27B New calibration to address oil life monitor accuracy.
12632821 5011A7EA New calibration to correct rough idle after a cold start
12628389 C655D45C New calibration for start of production
12627276 C923A3E9 Engine Operation
If anyone would like to check, just enter yout VIN here: https://tis2web.service.gm.com/tis2web/
1) enter VIN
2) Click on 'get cal id'
3) select 'ECM' click 'next'
4) select module 'engine operation'
The cal file programmed to your ECM will be indicated. Mine is the latest, 12645975
I have no idea exactly what was changed in the various cal files but it is known that the oil change interval (OCI) was shortened.