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
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
