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Old 05-06-2021, 06:55 AM   #7
swisstyphoon
Former GM Technician
 
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Drives: 2018 ZL1 A10, 06 Silverado Duramax
Join Date: Sep 2009
Location: Switzerland
Posts: 343
Quote:
Originally Posted by LT4Greg View Post
Definitely not normal in my opinion as mine surely doesn’t sound like that when warming up the engine. The dealer may have to keep it overnight to check it when it’s stone cold. Could be a loose belt, bad bearing in supercharger or pulley or something else is going on. If the dealership has a good tech you could go and let them see and hear your video clip of the noise to help determine the problem since your ZL1 is under warranty. Good luck and your video was very good on your first posting of a video.��
Sounds like a bad Alternator, or a idler, tensioner bearing.
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2018 Camaro ZL1 A10
Rotofab Big Gulp, Nick Williams 103, Magnuson 2650, 9.17" (14%) lower, 90mm upper, Vengeance Racing Heads (LME) Cam Package (Cammotion Stage 1), Johnson Lifters, JMS Voltage Booster, Lingenfelter high flow check valve, BBK shorty headers, Custom 2.75" down pipes, Gesi Gen2 high flow cats, MM catch can 791whp, 772ft-lbs SAE
Just added 30% XDI Injectors, LPE big bore hpfp, Flex fuel.
Elite tuning, results coming soon.


2006 Silverado Duramax Diesel
MPI Compound Turbo
40% over Injectors
Efi Live DSP5 Tuning

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