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19' Startup Noise?

dphel27
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dphel27 Enthusiast

dphel27

Posted
Posted

I would like to get others thoughts on the startup noise of my 19' 6.2 to see if it sounds normal. The noise I'm concerned about is the noise towards the end after the truck has started. It sounds like a rattling / grinding noise ( hard to describe ). I've got close to 2,500 miles on my truck and just started noticing this noise. It only has happened 3-4 times. It doesn't do it every time but sometimes it's louder and longer then others. When I first noticed the sound I had been driving for about 10 minutes, came to a complete stop the auto start / stop turned the truck off and when it turned the truck back on I heard the sound. It was quite loud and noticeable the first time it happened. I've also had it happen when I've remote started the truck. Thoughts?  IMG_5347.mp4

 

Thanks

 

Dan

Tucker Enthusiast

Tucker

Posted
Posted

Although my truck is a 17' it makes the exact same noise on a cold start first thing in the morning. I know your truck has a all new motor for the 19's , but I have read where it is normal for the 14-18 model truck's. Yeah I don't really like it either but they say it is normal.

  • Like 1
2019_Silverado_HC Enthusiast

2019_Silverado_HC

Posted
Posted

It almost sounds like the starter is sticking open and is getting overdriven by the engine once is started.  I have a 2019 6.2 and it hasn't made that noise at all.  Does it happen more when cold or after the truck is warmed up to operating temperature?

 

vinemann12 Enthusiast

vinemann12

Posted
Posted

It may be your Direct Injection Pump, during start-up

Almost sounds like the old Bosh mechanical diesel injector pumps during engine start..

 

Do you hear a slight ticking sound when engine is running in same area as pump,, as this is part of pressurization..

My old Vortec 5.7 never made this sound...

 

Cheers---K

Sierra Dan Senior Enthusiast

Sierra Dan

Posted
Posted

dphel27,

 

That sound is the Oil Pump.

This is a common "normal" sound especially in colder weather on the K2 trucks.

At least from the sound of your clip, my '14 Sierra does the same thing and others describe it as normal.

 

 

newdude Senior Enthusiast

newdude

Posted
Posted (edited)

Sounds like the oil pump rasp on start that began with the launch of the K2 LT based engines in 2014.  Having heard the clip, I'm going with normal. 

 

Quote

 

Oil Pump Cold Start Rrrrp or Rasp
 

The oil pump design has changed from a gerotor gear type pump to a two speed vane type pump for fuel economy reasons. At temperatures at or below 32°F (0°C) or when the engine has been sitting for a few hours, it is possible to have air enter the pump through normal oil drainback. Upon startup the owner may hear a short Rrrrp or Rasp coming from the front of the engine. It is most often heard during a remote start. There is nothing wrong with the oil pump or oil system. No repairs should be attempted for this condition.

 

 

 

Edited by newdude
  • 2 weeks later...
GMCustomerService Senior Enthusiast

GMCustomerService

Posted
Posted
On 10/24/2018 at 1:56 AM, dphel27 said:

I would like to get others thoughts on the startup noise of my 19' 6.2 to see if it sounds normal. The noise I'm concerned about is the noise towards the end after the truck has started. It sounds like a rattling / grinding noise ( hard to describe ). I've got close to 2,500 miles on my truck and just started noticing this noise. It only has happened 3-4 times. It doesn't do it every time but sometimes it's louder and longer then others. When I first noticed the sound I had been driving for about 10 minutes, came to a complete stop the auto start / stop turned the truck off and when it turned the truck back on I heard the sound. It was quite loud and noticeable the first time it happened. I've also had it happen when I've remote started the truck. Thoughts?  IMG_5347.mp4

 

Thanks

 

Dan

Hi, Dan. I understand how frustrating this startup noise concern must be for you. If you’re thinking about visiting your servicing GM dealership about your situation, I would be happy to work alongside them, to provide an additional layer of support. I hope to hear from you soon.

 

 

Anthony J.

SILVER SLED Senior Enthusiast

SILVER SLED

Posted
Posted (edited)

My truck does like the video on start up. Not a 19 but pretty much the same.  It's not annoying since it's only on startup, but if it did in on auto stop/start events it may get annoying. 

Edited by SILVER SLED
  • 3 weeks later...
SS502 Senior Enthusiast

SS502

Posted
Posted
On 10/24/2018 at 5:05 AM, Tucker said:

Although my truck is a 17' it makes the exact same noise on a cold start first thing in the morning. I know your truck has a all new motor for the 19's , but I have read where it is normal for the 14-18 model truck's. Yeah I don't really like it either but they say it is normal.

I wouldn’t say “normal” my 18 6.2 has never made anything close to what is being described. I can hear (well used to hear but have the Borla ATAK now) the injectors if I’m outside the truck...can’t hear them inside at all.

  • 1 year later...
  • 3 months later...
Stans2019AT4 New Member

Stans2019AT4

Posted
Posted

I have a 2019 GMC AT4 6.2 with a noise at start-up that sounds like a bearing in one of the pulleys or belt tensioner is bad.  I noticed it around the 3,000 mile mark. It is worse during cold starts and it is almost a squealing noise.  I took it in to the dealership who had it for almost a week, and finally determined the noise was coming from the catalytic converters and there was nothing they could do about it.  They even put the truck up on the lift and had me come in to listen to see if it was the same noise I was talking about. And yes the noise was actually coming from the catalytic converters.  I guess this is normal but it really sucks!  My 2017 Chevy Silverado that I traded in for the AT4 did not make any noise,  just saying!  Stan S.

  • 1 month later...
GMCustomerService Senior Enthusiast

GMCustomerService

Posted
Posted

 Hi, all.  Our team would be more than happy to take a closer look into these concerns. To do so, please send an email to [email protected] ATTN: Forum Username/GM Trucks  with your contact information, VIN, brief description of your concern,  and preferred dealership. We look forward to hearing from you. To learn more about GM's privacy policy, please visit http://bit.ly/2h3ZUnC. 

 

Aleigha W. 
 

Bratbowtie Enthusiast

Bratbowtie

Posted
Posted

I have a 2020 6.2 and 3ooo miles with the same noise, almost a belt squeak,  tensioner noise, or what ever ,loud enough when it starts people next to you look,,brand new truck 3 times I have been told your belt is making a noise, took it to Mark Porter GMC, they had it for 4 days ,didnt hear a thing, they threw grass all over the rear mowing or weed eating (yes I have pics) but made the noise when i picked it up ,and every time i have started it before and since. I will also be filling out your form for help please

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