By Robert Sherefkin, David Barkholz, Automotive News
DETROIT – A nine-week summer shutdown at most of General Motors’ North American plants could bankrupt as many as 10 percent of GM’s top 300 parts makers, says a source familiar with GM’s thinking.
The 300 top suppliers ship more than 80 percent of the parts that go into GM vehicles. The automaker has 1,500 parts suppliers, all of which will suffer from the shutdown.
The 300 range from small companies such as mirror maker Gentex Corp. to multibillion-dollar enterprises…