They didn't like my position on GM, which is that the scientific consensus is that it's safe".
Delphi was once part of GM, which still has financial obligations to the firm.
GM, which also suffered slower-than-expected turnover of its trucks, said it sold 309,375 new vehicles last month, down 13% on a year ago.
Cable flew to New York last week to persuade executives at GM, which owns Vauxhall, to keep open the plant, which is one of the region's biggest employers.
It is no GM, which had far deeper structural problems before it used bankruptcy to offload some of them.
Sceptics may wonder why GM, which is flirting with bankruptcy, is wasting time on such a crazy idea.
Chrysler, now part of Italy's Fiat, is again profitable, as is GM, which returned to the stockmarket in 2010.
So too is GM, which is already building a factory for a new low-cost small car.
The situation is similar at Chrysler, and worse at GM, which has more than two pensioners per employee.
GM, which was bailed out by the US government in 2009, on Thursday wrote off a further $150m related to the recall.
GM, which has two-and-a-half pensioners for every employee, reckons pensions and health-care benefits add $1,000 to the cost of each car it makes.
