have a 25 chevy that has google built in, i've installed the HA app thru the play store and logged in with the account i created for my car but it seems very flaky. it doesn't always update to show anything other than 'navigation' and sometimes the 'cover' devices don't respond when touched (ratgdo controllers on my garage door openers).
if i go into android auto thru my phone it's more reliable but for some reason it's very slow to start up