Four problems related to ignition module have been reported for the 1999 Chevrolet Malibu. The most recently reported issues are listed below.
Anti theft controller shut engine down due to faulty ignition switch/module.
Had to have the module replaced. Mechanic didn't know why it went but knew thats what I needed. After contacting gm they said that it was not a manufactures defect and could not give me a reason why it just went out.
While operating the vehicle the rpm gauge started to show max rpm readings to 0 and changing rapidly. The car was being driven to the repair shop to have this checked when at a intersection the vehicle just cut off. The engine did not stop but the car could only be moved very slowly until a minute or two past then the speed went up a bit. The repair facility found a crankshaft sensor and the computer to be the fault. Currently the vehicle runs good, but the gas mileage is only about 17-18 mpg. Will turn it back into the german dealer to have this checked.
Part of the vehicle shut down, causing the vehicle having to be towed.