2004 chevy malibu classic

my blinkers make wierd sounds and does not work half the time unless i hit the hazard lights. problem two theft system light comes on and stays on. problem three shut off car to re-start i think i can i think i can then start no problem after words. fourth problem the seat belt buzzer wont stop have to play with key in ignition. btw its a 2004 chevy malibu classic hubby bought not me lol

It could be power to the Body Control Module or flakey BCM. There is an IBCM 1 fuse under the hood that you could reseat and the BCM connector reseat. A flackey ignition switch could very well be the problem. There are connection issues where the TSB says to add dielectric grease to the connectors and reseat them.