Alright guys, I drive a 2002 Monte Carlo SS. When I first bought it, it had no problems at all until about three months ago. A high pitched sound would come from the dash whenever I would turn my blinkers on, but it would fade with time and never come back for a couple of weeks. Now, the problem has gotten ALOT worse. When I turn the car on, these lights will all stay on:

ABS Light
Brake Light
Check Engine Light
Airbag Light
Trac Off
Service Traction System

On top of that, both of my turn signals do not respond at all when I go to use them. I would really appreciate it if someone could help me with this problem, because I don't want to head to the Stealership and give up an arm and a leg so they can tell me I have to pay 1,000+ dollars. Thanks!