Hold on to your hats, the grand total for this bill was $2638... Ouch -- extended warranties are your reprieve!

I also learned there is a dry-silicone belt lubricant which is, according to the GM shop, safe to use on your belts -- it sprays dry and is not wet... Though I'm sure too much and it would cause slippage. They claim my aftermarket belt was the culprit and should be replaced, even though it squeaked with the old and new belt (about a year old now, and not glazed by any means) the same. The price for this revelation -- $46.50 (not covered by the ext. warranty). Personally I give it a month or less before the squeak is back -- we shall see.

Update: Surprisingly, 3 months later, the squeak is NOT back...

 

This issue with an odd vibration at speed is somewhat ellusive, which I am not certain is resolved yet -- more like a fast wobbly vibration when I juice-it around 60 mph.

When the Chevrolet shop was looking into the OP issues, they mentioned the wheels needed balancing -- just had that done today -- will have to do more road-testing to see if the other issue is gone yet. I am skeptical -- so anyone have any other ideas what it could be?

 

Wheel balance issues generally get worse the faster you go. It sounds like you either have a damaged transmission mount, or possibly bad u-joints again.

 

I do really doubt those are issues again, because the issue is the same now as it was before this other work was done. I think it's something separate, like perhaps where the shaft connects inside the trans?

 

Finally finding the solution, years later.

https://camaroforums.com/forum/93-02...es-dust-75361/