Was this an account that you disputed with the CRA? Do you have your payment records that reflect this is not accurate? I would start by contacting Chrysler. Maybe this was a reporting problem on there part.
I did dispute the account a while back because they had an "extra" 30 day late in there... I don't think I have any old records from this though - I'm not sure what to do. I just want it put back the way it was 
I don't know what I would say to them if I contacted them. Especially if this change is actually correct (I honestly don't recall) - they have been reporting the same for years and all of a sudden it changed 9 months!
Call them and ask them why they changed it. Ask them to send you a printout of your payment history. See if you can find your old bank statements. The worst that its going to happen is it will remain the way it is...best case they will put it back. This is one of the bad things about disputing old accounts thru the CRA. Sometimes it is better just to call the lender and discuss it with them to see why they are reporting the way they are. Then if there is an error you can ask them to send the change to the CRA. But call Chrysler, at this point you have nothing to lose and everything to gain.
I read on another thread that 1, 2, 4 & 6 years are important anniversary dates. I would imagine you will see an increase of some sort after the 2 year mark next month.
Isn't this a coincidence that they also declared bankruptcy today! I wonder if there was some oddball glitch with Chrysler #'s across the board!