Not a problem/need answer to determine required maintenance.
Chevrolet Q&AAsk Your Question
2009 Chevrolet Silverado 3500 HD Question: How often do you clean/replace the exhaust filter and where is it?
Answer #1Superbob April 20, 2011, 11:11Master
The best source is the owner's manual. If you're speaking about the particulate filter, It may be scheduled as regular maintenance at a high mileage. I don't have any significant information on the particulate filter on this vehicle.
If you want to ask a specialist, here's a directory link for you: