2019 Duramax Regen
If you have a L5P Duramax Don’t let them do the update for regens, mine used to to 4 to 6 hundred miles between regens, after the recall now 2 to 3 hundard miles
Forum Discussion
deltabravo wrote:ktmrfs wrote:
duramax will also go to high idle in neutral during a cold start on cold days to help warmup. RPM will go to somewhere between 800-1000 IIRC, grid heater stays on, turbo goes to max backpressure and throttle valve is activated. All this to help warm up.
Doesn't the high idle only engage if you have the setting turn on in the DIC?
On my 2009, elevated idle has to be enabled in the DIC before it engages at the OAT temp that causes it to engage
Now that you mention it I think you are correct that it is a DIC setting. And default was not enabled. If so I changed mine. Been 5 years ago.......
I know on my 2004.5 there is a high idle on cold temp start setting that was an option that was enabled either through the DIC or if you didn't have the DIC readout through a set of steps you did once on a start.
On both trucks depending on how cold it is, the step from normal to high idle may take a minute or so, the colder it is, the longer it takes.
Also my 2015.5 came with the optional two stage high idle that can be engaged with the cruise control. but that high idle does not do much to help warmup, just up the idle for charging, plowing etc. when in neutral.
