Hello. I have a 2009 Tahoe Hybrid that has recently started chirping when the engine is running. It is not the idler pulley as I had a horrific chirping in them and recently fixed them. I believe it is coming from the charging system. I have a great mechanic who is trying to do some research on the hybrid charging system to see what the fix is for this. I thought I would ask some of you owners if you have heard anything like this on yours and how it was fixed. Thanks in advance!!

 

can you take a video of the sound? if it is the crackling sound of electricity like the ones in power plants, it is normal.

 

What was the cause of the chirping sound ?

 

if it is like the electric spark sound of the lucas film THX, it should be normal. I do get those sounds and looks cool just proving to bystanders that my hybrid is electric as well