2008 GMC Sierra SLT 3500HD w/ LMM Durmax and Allison 6-Speed
I bought my truck with 100k on it. It just rollled 192k. For all of those miles I’ve owned it the DPF has regenerated about 1x per tank of fuel. Now suddenly it’s regenning about 4-5 times per tank. Truck is stock. I don’t have a tuner or anything to look at the DPF stats or injector balance rates. I just have a simple obd2 scanner that gives me basic engine parameters. None of those look off. There’s no codes. Fuel mileage is still good (when it’s not regenning). When it regents it gets up to about 1200F. Thoughts? Plugged DPF?