Chevy and GMC Duramax Diesel Forum - Reply to Topic
2017-19 GM T-K2 Platform Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

Thread: noise after turning off engine Reply to Thread
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  Topic Review (Newest First)
11-15-2019 10:04 AM
LoyalGMCGuy My new to me 2017 GMC HD3500 LP5 makes all types of hard to describe noises after I shut it down (whirring, buzzing, slushing, etc.); noises that my 2011 LML never made. They don't really bother me and I assume they are normal since the truck runs fine but....are these noises normal?
11-11-2019 09:11 AM
dsfloors thank for the info
11-11-2019 08:16 AM
Bullseye21 When my 2019 is doing a regen the rpm's will be just above 750 when it is normally around 600'ish when stopped at a light or in the driveway. If you get out of your truck the exhaust will be hot as hell and blowing harder too.
11-11-2019 07:43 AM
dsfloors How do you know when it's doing a regen?
11-10-2019 09:32 PM
pullin15
Quote:
Originally Posted by Bullseye21 View Post
Truck was probably doing a regen of the DPF. Mine sounds the same way if it’s doing a regen and I turn the truck off.
Agreed. All symptoms of shutting down during regen. I don't shut mine off during regen... But im OCD.
11-10-2019 07:45 PM
dsfloors Does it smell like something burning when it regen
11-10-2019 07:44 PM
dsfloors
Quote:
Originally Posted by Bullseye21 View Post
Truck was probably doing a regen of the DPF. Mine sounds the same way if itís doing a regen and I turn the truck off.
Does it smell like something burning when it regen
11-10-2019 02:58 PM
578VTR After shut-down, my '16 sounds like R2D2 is under the hood...and mad about it.

All kinds of clicking and servo noises.
11-10-2019 02:47 PM
paauto Mine makes a terrible noise as well when I shut it down - it's my wife!!
11-10-2019 02:05 PM
Bullseye21 Truck was probably doing a regen of the DPF. Mine sounds the same way if itís doing a regen and I turn the truck off.
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