SEC to GM, Ford: Let's See Those Pensions  DETROIT (Reuters) - U.S. regulators asked automotive giants  General Motors Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=GM.N target=/stocks/quickinfo/fullquote"&gt;GM.N&lt;/A&gt;and Ford Motor Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=F.N target=/stocks/quickinfo/fullquote"&gt;F.N&lt;/A&gt; for  information on how they account for pension and health care  plans, the companies said on Tuesday.