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2015 2500 has been in regen for two years.

It sounds like you need to take it somewhere honestly. I believe you are in over your head. If you give a location maybe someone can point you to a reputable shop.
Im near San Antonio. It’s been in the shop 3 times with nearly $10k spent doing what they recommended.
 
Im near San Antonio. It’s been in the shop 3 times with nearly $10k spent doing what they recommended.
I’d have to ask the shop foreman some tough questions, like why have I spent 10k for no reason?
 
What have you spent 10K on?

At a minimum your DPF needs replaced, as black smoke is only possible with a failed DPF.

Also, the isn’t deleted with stock software.. right?
 
What have you spent 10K on?

At a minimum your DPF needs replaced, as black smoke is only possible with a failed DPF.

Also, the isn’t deleted with stock software.. right?
Three times in diag then the sensors and other things the shops have recommended. One shop said I had to pay to send the filter off for cleaning.
 
I don’t know how to get that information. It’s blowing black smoke. When I have the exhaust brake on, it will clear the regen under deceleration but the second I touch the gas peddle it the regen comes back.
If it’s pushing soot-laden exhaust out the tailpipe the DPF is either cracked in the media, or the pressure vessel is compromised and the exhaust is escaping around the media. A DPF that is functional should trap 99% or more of the soot in the exhaust stream and not allow anything past.
 
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