Can I keep my car in Chapter 7?

Yes you may keep your car, if that is what you want to do.  If you want to keep your vehicle you will need to be current on your payments and basically re-sign on your debt by signing a reaffirmation agreement.  There is also a redemption option where a finance company could re-finance your vehicle for the current value if you are upside down on your vehicle. 

However, if you do not want to keep your vehicle it is not necessary to keep it.