Draining the rail?
 

Can you drain the rail on a Duramax with just programming?

yes with to much pulse width its easy

Would any off-the-shelf programmers drain the rail enough to set low-rail-pressure codes?

i would say the PPE hot would definitely do it

PPE hot set a low rail pressure code in my LLY

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at second thought i think it was the edge juice w/ attitude wich did it i can't remember...

it's been a while...

Yes

That same calibration could be used if the cp3 components were updated and programmed properly.

Just a thought.

stacking programmers, clogged fuel filter. PPE tunes. maybe some quadzilla tunes

a p1093 will usually come up if you do

Depends a lot on the truck sometimes 120HP tune can drain the rail.