It’s safe to say that General Motors is struggling for relevancy these days and, while the Chevy Volt could be a huge step into the modern era for the company, that still leaves every other car looking a bit — traditional, technology-wise. OnStar is going to help, expanding its Volt-specific controls to the entire 2011 lineup of GM cars. When we saw OnStar’s Volt app earlier this year we loved how it not only let you control recharging but also unlock the doors and monitor system specs from anywhere. While monitoring recharging status obviously won’t be much good if you’re rocking a good ‘ol ICE vehicle, you will still be able to start the car remotely, unlock doors, and also monitor stats like tire pressure and oil level from your iPhone, BlackBerry, or Android handset, as demonstrated in a video after the break. Yes, you’ll need to be an OnStar subscriber to use the app, with rates currently starting at a somewhat steep $18.95 per month. Now, if only there were an app that could help us to afford a new ZR1.