What was the sticking point in negotiations between GM and the UAW? The UAW claims it is job security for they future; the autoworkers' union wants guarantees from GM that certain future car models will be built in the US:

UAW officials said the 73,000 UAW members who work at about 80 U.S. facilities for the nation's largest automaker didn't strike Monday over what many thought would trip up the talks: A plan to shift the retiree health care burden from the company to the union. They said they also didn't strike over wages.

They said union members walked out because they want GM to promise that future cars and trucks such as the replacement for the Chevrolet Cobalt small car or the still-on-the-drawing board Chevrolet Volt plug-in electric car will be built at U.S. plants, preserving union jobs.