96 Blazer weird problems

Yesterday my blazer started acting erratically. It would start buzzing with the door ajar sound when I turned the headlights on. All the gauges are dead. The push button 4wd cluster lights don't work and it doesn't seem to be running well at all.

Also it doesn't seem to want to start up right away now.

Sounds like your alternator and/or battery is the problem. Check your connections at the battery (do any of them have corrosion? Are they tight?) Then take it over to advance autoparts and let them check your alternator.