My OnStar, satellite radio, and bluetooth all quit at once. When I took it to the Chevrolet dealer for repair, I was told it would cost $900 and might not fix the satellite radio. I know that OnStar is ending for my HHR as the 2G radio signal is being discontinued. Can I buy a replacement VCIM and is it a DIY project?

 

It could be just an antenna problem, those features are mostly signaled from the rear antenna. It could be a loose fuse in either fuse box .
there are options, like a new head unit, check out Crutchfield s website for your model year and opinions, like the Pioneer 7 speakers system with amp, it’s different then the 6 speakers standard radio.
There are interface adapters to keep your steering wheel controls

https://www.crutchfield.com/car/carselector.aspx

 

Does the VCIM control the bluetooth? I will miss OnStar but I really want to get the bluetooth to pair with my phone. The radio works fine, just no Sirus now.

 

to the forums!

Fuse #24, interior fuse block.

 

Yes, to the BlueTooth question. How much did it cost to not look at the fuses?
You don't have to subscribe to OnStar or XM/Sirius to keep the BT. I think the XM/Sirius is a separate box, they will probably sell you a new one.
If you are not capable of checking fuses then it is not a DIY job.