2016 SILVERADO ENGINE SQUEAK??

[nardeezy]

1 hour ago, badge171 said:

If you think its coming from the belt or the idler pulley . Pull the belt and start it to see if the noise is there !

 

I’ve never done this before.  Pull the serpentine belt while starting the engine?  Please clarify.

[nardeezy]

1 hour ago, silveradosid said:

to me it sounds like low freon and the a/c is cycling the clutch which also sounds like it is going to fail

Interesting.  Under warranty, my a/c unit failed a couple of years ago and was replaced.  I don’t recall hearing this noise before the first a/c unit failed.

[nardeezy]

3 minutes ago, BigBadSierra said:

I would check the idler pulley as Badge171 said. They are not to expensive to replace but they Will blowout all kinds of parts if it gives out.

Will do.  Is a premature failure of the idler pulley a known defect in the 5.3L engine?  I’ve had a 2001 Chevy Tahoe (5.3L) with 250k plus miles and it never had an issue with the engine or pulleys and is still on the same a/c unit.  All I replaced was the water pump, thermostat, serpentine belt and belt tensioner.  That’s it.  

[BigBadSierra]

52 minutes ago, nardeezy said:

Will do.  Is a premature failure of the idler pulley a known defect in the 5.3L engine?  I’ve had a 2001 Chevy Tahoe (5.3L) with 250k plus miles and it never had an issue with the engine or pulleys and is still on the same a/c unit.  All I replaced was the water pump, thermostat, serpentine belt and belt tensioner.  That’s it.  

It could just be a bad part. I have seen them go early in almost every brand of vehicle. We had one go in an Escort that only had 20,000 miles on it.

 

I have a friend who is a mechanic and will change them ever time the belts need to be replaced he calls it $60 insurance. 

[badge171]

1 hour ago, nardeezy said:

I’ve never done this before.  Pull the serpentine belt while starting the engine?  Please clarify.

Just pull the belt as per the manual , or YouTube start your vehicle . narrow the source of the noise down.   

[DAP]

My 2017 Yukon has the same sound... what did you find out to solve this issue?

[MaverickZ71]

If it does it especially on cold starts when it is damp out, chances are it's a bad idler pulley or bad belt tensioner.  If it's not that, it could be a bad lifter turned sideways in it's bore, scarring the cam as it turns, or an engine bearing.   

Edited January 22, 2020 by MaverickZ71

[Rapidrobert]

My 2018 Silverado makes the same noise.
I removed all the belts and the noise is still there. 
Did anyone ever get the source of the noise figured out?

i am going to get the truck on a lift tomorrow to see if I can pinpoint the source of the noise. 

[CraigUs]

Just found this forum. Just bought a used 2017 Sierra 1500 5.3L and same exact noise on driver side of engine - got same run around from dealer saying it’s normal. 
Took to another dealer who recorded the noise and said 95% sure it’s water pump,  $650 later it’s still makin the noise . I’ll deal with service writer tomorrow and refuse card change if I have to. 
But has Anyone gotten this identities yet??
There’s 8 years of posts here and no resolution found. 
Anyone??