Greg2009

The battery on my 2009 was getting old, so I decided to order a new battery the other day. Before I put the new battery in, I ran a test with a Battery Analyzer, the test said voltage 12.67 volts and 100% battery capacity and 3.48 m-ohms resistance, which is correct for a new battery.


I looked at the code for the build date of the battery, P039R, code means according to AC Delco chart, P for professional, 03 for March and 9 for year 2009, R for plant that made it, so the new battery will be 10 years old next week, next week being March 2019. The battery was installed on 2/25/2019, the battery cannot be a March 2019 battery, because it has not been built yet. I checked, the codes roll over every 10 years. So next week being March 2019 a battery being bought next month would still be P039R, assuming the battery was really built in March 2019, the 9 rolled over to 2019 from 2009.

P039R


Battery Chart from web as an example

What makes this interesting is, the C6 is a 2009, so it really looks like it is the original battery using the battery code P039R. Weird but true battery store.

Not sure how these batteries are really stored at a parts warehouse, my guess the battery must be stored dry and the acid must be put in before being shipping out? In the past I have bought motorcycle batteries that were stored dry and the acid was in the box and had to be added to the dry battery.

You would think a wet battery setting on a shelf for 10 years would be completely dead, and the test above show new.

And for those that must do an emission test, dis-connecting or replacing a battery will reset the IM Readiness codes to a Not-Ready State.


You need to due the GM Drive cycle to get them back to ready, mine still is trying to do the EVAP after 5 Drive cycles, temp here is freezing, maybe the reason.

Oh Boy

The US Environmental Protection Agency (EPA) guidelines allow up to two monitors to be in a "not ready" state for model year 1996 through 2000 vehicles and one monitor "not ready" for 2001 or newer model year vehicles. I think that applies to all states and I know for a fact it does in N.Y.

Oh Boy

BTW I use the same scanner except it's the 201. Works pretty good for what I need it to do and it was cheap.