[VinnAY]

Originally Posted by coruiz

video?

IKR...Just record the damn thing and post it already.

[DangerZL1]

Originally Posted by Dgarcia

What does my alignment have to do with the noise happening at startup?

I thought you were referring to while you were driving. The 10-speed transmission is noisy at idle, but I don't think I've seen anything on the 8 speed. It could easily be the torque converter. An engine stethoscope would help pinpoint the noise. They also make something called chassis ears which are microphones on wires used for identifying suspension noises.

[MackSteelPrivateEye]

Originally Posted by Dgarcia

It hums in park but not all the time. This morning was over whelmj g though..lol when I'm at 65 mph(usually when it hums) then shift to neutral it goes away

Transmission issue if it stops when in Neutral.

[Wierd Harold]

@ 65mph and you drop it in to neutral the noise goes away ,right? To me it seems you have a differential problem like pinion bearings.just a guess

[Dgarcia]

So my car has been in and out of the dealer for thisnhumming noise at around 65mph in deceleration. They changed a couple parts and it still does not fix it. They're calling a GM engineer to come look at it. Looks like this is headed to a buy back possibility.

[Jhoceva]

Originally Posted by Dgarcia

So my car has been in and out of the dealer for thisnhumming noise at around 65mph in deceleration. They changed a couple parts and it still does not fix it. They're calling a GM engineer to come look at it. Looks like this is headed to a buy back possibility.

Did you ever figure out what was causing this? Mine is doing something very similar.