[turbodiverart]

Hi All,

Just curious. Do other people's diesel's make a sound like a few servo switching on and off right after you turn your engine off? I haven't had the truck long enough to see if it happens all the time or only when the truck is cold. I think after driving it a long distance I just don't get our fast enough to know. Just does it a few times, it's definitely in the engine bay. it's like they are switching back and forth between 2 states but it's mechanical, not like a relay clicking. Mine is a 2017 Z71.

 

[Burgess159]

Mine does it and always has. 87k miles and it still runs so I guess it’s normal.

 

[turbodiverart]

OK, I was curious. I honestly don't care enough about it to try to locate that it is. At long as others have it I'm OK. thanks for the reply!

 

[Jiggy]

Mine also I have 171000. Miles on it

 

[Coloradorob]

It’s the EGR cycling
Soot buildup can cause the EGR to stick.
cycling it helps stop it from sticking...

Rob

 

[Antman92]

Hi All,

Just curious. Do other people's diesel's make a sound like a few servo switching on and off right after you turn your engine off? I haven't had the truck long enough to see if it happens all the time or only when the truck is cold. I think after driving it a long distance I just don't get our fast enough to know. Just does it a few times, it's definitely in the engine bay. it's like they are switching back and forth between 2 states but it's mechanical, not like a relay clicking. Mine is a 2017 Z71.

Yep...118000 miles and it does it every time.

 

[rdh7]

Yes. Always has. 47.5k mi. Wondered what that was....

 

[Arcforce]

It’s the EGR cycling
Soot buildup can cause the EGR to stick.
cycling it helps stop it from sticking...

Rob

This is the correct answer.

 

[Florida beachbum]

Hi All,

Just curious. Do other people's diesel's make a sound like a few servo switching on and off right after you turn your engine off? I haven't had the truck long enough to see if it happens all the time or only when the truck is cold. I think after driving it a long distance I just don't get our fast enough to know. Just does it a few times, it's definitely in the engine bay. it's like they are switching back and forth between 2 states but it's mechanical, not like a relay clicking. Mine is a 2017 Z71.

Yep mine does it. 2019 zr2. Sounds like a few even spaced clicks after shutting it down

 

[Devan coss]

Hi All,

Just curious. Do other people's diesel's make a sound like a few servo switching on and off right after you turn your engine off? I haven't had the truck long enough to see if it happens all the time or only when the truck is cold. I think after driving it a long distance I just don't get our fast enough to know. Just does it a few times, it's definitely in the engine bay. it's like they are switching back and forth between 2 states but it's mechanical, not like a relay clicking. Mine is a 2017 Z71.

Mine has always done it to not sure what it is maybe like the individual coil packs shutting down

 

[Trail loving chevy]

Then we all agree it’s normal and they all do it. I have a 2018 zr2 makes that noise every time now I know why

 

[Sgt. Rock]

Hi All,

Just curious. Do other people's diesel's make a sound like a few servo switching on and off right after you turn your engine off? I haven't had the truck long enough to see if it happens all the time or only when the truck is cold. I think after driving it a long distance I just don't get our fast enough to know. Just does it a few times, it's definitely in the engine bay. it's like they are switching back and forth between 2 states but it's mechanical, not like a relay clicking. Mine is a 2017 Z71.

Mine is the same year and model. I thought it was the exhaust system cooling. Another thing it does, when it has been parked for a while, especially when it is in my garage, it feels like something in the drive train is hung up for second then it snaps loose. Like maybe a brake pad snagging on a rotor. I put in D and turn to the left to get out of the garage, and it almost feels like the whole truck is hung up on something. Like a tool or something had rolled under the truck just in front of the tire. Anyone else?

 

[turbodiverart]

Mine is the same year and model. I thought it was the exhaust system cooling. Another thing it does, when it has been parked for a while, especially when it is in my garage, it feels like something in the drive train is hung up for second then it snaps loose. Like maybe a brake pad snagging on a rotor. I put in D and turn to the left to get out of the garage, and it almost feels like the whole truck is hung up on something. Like a tool or something had rolled under the truck just in front of the tire. Anyone else?

My 1999 Suburban does that. With the Burb it was the huge 3.5" wide shoes in the rear brakes. One time to figure it out when it had sat for a while, I lifted the rear, started and put it in reverse. On my burb I'd have to give it quite an amount of pedal to break free, it was the rear brakes. never thought it would happen with the front disks but maybe?

 

[turbodiverart]

Yep mine does it. 2019 zr2. Sounds like a few even spaced clicks after shutting it down

Mine's is not so much a click but more like a mechanical servo cycling. It's not a sharp click sound but almost like it's cycling back and forth with a swooshing sound. I'm sure it's the same thing.