GM recalls 3.5m vehicles

General Motors is recalling nearly 3.5 million vehicles because of a brake problem that increases the risk of a crash, according to documents published by a US safety agency.

The issue is with the vacuum pump, which can diminish vacuum over time, affecting braking and  “extending the distance required to stop the vehicle, thereby increasing the risk of a crash,” according to a letter to GM from the National Highway Traffic Safety Administration.