High pitch whining noise with videos - Chevy and GMC Duramax Diesel Forum
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post #1 of 24 (permalink) Old 06-27-2019, 12:35 PM Thread Starter
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High pitch whining noise with videos

Went to accelerate and a horrible down happened I’m not sure what it was. I took a videos because it lasted til the downshift when I slowed down after that it didn’t happen again.

2008 Chevy 3500 6.6l lmm
Airdog 4g lift pump
Wcfab ybridge and egr delete.
Edge monitor with egr probe
PPE RACE FUEL VALVE
Efilive by Cory Willis and switch
Flatbed with Hydraulic hayspear
3 inch lift, lifts for less.
PVC re route
65mm upgraded turbo
51 gallon aux tank
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post #2 of 24 (permalink) Old 06-27-2019, 12:36 PM Thread Starter
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https://youtu.be/HVUxxesvnOo

2008 Chevy 3500 6.6l lmm
Airdog 4g lift pump
Wcfab ybridge and egr delete.
Edge monitor with egr probe
PPE RACE FUEL VALVE
Efilive by Cory Willis and switch
Flatbed with Hydraulic hayspear
3 inch lift, lifts for less.
PVC re route
65mm upgraded turbo
51 gallon aux tank
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post #3 of 24 (permalink) Old 06-28-2019, 12:32 PM Thread Starter
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Anyone please

2008 Chevy 3500 6.6l lmm
Airdog 4g lift pump
Wcfab ybridge and egr delete.
Edge monitor with egr probe
PPE RACE FUEL VALVE
Efilive by Cory Willis and switch
Flatbed with Hydraulic hayspear
3 inch lift, lifts for less.
PVC re route
65mm upgraded turbo
51 gallon aux tank
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post #4 of 24 (permalink) Old 06-29-2019, 04:16 AM
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Hard to tell but sounds like maybe low power steering fluid? Just a shot in the dark

2015.5 gmc Lml 2500 slt double cab no modifications
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post #5 of 24 (permalink) Old 07-03-2019, 09:20 PM Thread Starter
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Quote:
Originally Posted by Sovtlml View Post
Hard to tell but sounds like maybe low power steering fluid? Just a shot in the dark
I don’t think so. don’t have to turn my wheel at all. It sounds like it’s from the tranny or the engine. Thanks for the reply. Still trying to figure it out it doesn’t happen all the time. It’s doesn’t have as much power when it happens as well.

2008 Chevy 3500 6.6l lmm
Airdog 4g lift pump
Wcfab ybridge and egr delete.
Edge monitor with egr probe
PPE RACE FUEL VALVE
Efilive by Cory Willis and switch
Flatbed with Hydraulic hayspear
3 inch lift, lifts for less.
PVC re route
65mm upgraded turbo
51 gallon aux tank
knightstilepro is offline  
post #6 of 24 (permalink) Old 07-04-2019, 07:39 AM Thread Starter
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I’m glad I got this on video at least.

2008 Chevy 3500 6.6l lmm
Airdog 4g lift pump
Wcfab ybridge and egr delete.
Edge monitor with egr probe
PPE RACE FUEL VALVE
Efilive by Cory Willis and switch
Flatbed with Hydraulic hayspear
3 inch lift, lifts for less.
PVC re route
65mm upgraded turbo
51 gallon aux tank
knightstilepro is offline  
post #7 of 24 (permalink) Old 07-04-2019, 05:15 PM Thread Starter
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Bump

2008 Chevy 3500 6.6l lmm
Airdog 4g lift pump
Wcfab ybridge and egr delete.
Edge monitor with egr probe
PPE RACE FUEL VALVE
Efilive by Cory Willis and switch
Flatbed with Hydraulic hayspear
3 inch lift, lifts for less.
PVC re route
65mm upgraded turbo
51 gallon aux tank
knightstilepro is offline  
post #8 of 24 (permalink) Old 07-05-2019, 05:05 PM
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I had a idler pulley bearing go bad and it squeeled like crazy but was higher pitched than that. Can't hear anything underhood??

2004.5 Silverado CCSB LLY
Sinister EGR delete,
S&B air box and up-sized S&B intake mouthpiece,
CAT converter delete,
ATP 5 stage tune - Edge CST w/ EGT and backup camera,
5" AFE Power full exhaust kit
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Just a nice CLEAN stock truck for towing the toys to the playground with a back seat full of grandkids
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post #9 of 24 (permalink) Old 07-05-2019, 06:10 PM Thread Starter
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Quote:
Originally Posted by MarvDmax04.5 View Post
I had a idler pulley bearing go bad and it squeeled like crazy but was higher pitched than that. Can't hear anything underhood??

This isn’t all of the time just once in a while. Stops when I’m finally shifts. Only when I’m driving as well. So frustrating.

2008 Chevy 3500 6.6l lmm
Airdog 4g lift pump
Wcfab ybridge and egr delete.
Edge monitor with egr probe
PPE RACE FUEL VALVE
Efilive by Cory Willis and switch
Flatbed with Hydraulic hayspear
3 inch lift, lifts for less.
PVC re route
65mm upgraded turbo
51 gallon aux tank
knightstilepro is offline  
post #10 of 24 (permalink) Old 07-06-2019, 08:57 AM
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Too bad the noise isn't made all the time. You could pull your serpentine belt, go for a (short) drive, and see if there was any change. To me, it sounds like power steering pump.

Ron Nielson
2008 Silverado LT, CCLB, Edge Insight CTS
2009 Arctic Fox 29-5T, Silver Fox Edition, Onan 3600 LPG generator
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