Watch Fast Money and Mad Money on CNBC for about a week before you invest. They will have much better stock picks than GM or Ford.
If' you're dead set on either of them, I think Ford would be the better long term investment GM is more expensive than Ford. At least go to Yahoo Finance http://finance.yahoo.com/ and learn a little about it before jumping in. You can put in the ticker GM or F to see information about those stocks. You can look at historical pricing, news items, analysist opinions. It's all right there. If you're not willing to do your homework, you should perhaps stick to mutual funds.