Chosen Solution
I may need a replacement exhaust PARTICULATE FILTER. I have not been able to locate the item. HELP!
sharrison DEF and DPF may be on the same exhaust pipe, but they are not related. No reason for you to consider changing the filter. Usually the DEF would have to be checked via refractometer but GM obviously cannot do this. So what happens on your diesel is that the the DEF’s effectiveness is measured via a pre and post catalyst NoX sensor. Now there apparently is a test procedure that GM uses (still trying to find out more about it) which will evaluate the DEF injector and the NoX sensors. Commonly for your Cruze are bad NoX sensors.
One thing that works, drive it like 30 or 40 miles hard. Like 60 in 4th gear. Sometimes the DEF crystallizes on the injector. That worked for me a few times. However you should look at the injector and the NOX2. The last time that did not work. I replaced my NOX2 and it did not clear the code.
https://www.gmpartsstore.com/oem-parts/g… This is a link to the oem GM diesel particulate filter. Just fixed my problem it says catalytic converter but its the diesel particulate filter!
