My ABS light, TRAC OFF light, check engine light, passenger airbag light, and service traction system light are on. I HAVE NO IDEA WHY! Its a 2002 monte carlo ls and i need some help with these. Also, when i get up to about 40mph, my car shimmys/shakes. Anyone know why any of these happen?

 

The CEL can be read for free at most auto-parts stores. Get that checked out.

The ABS/TRAC and Service lights are most likely a wheel-hub assembly gone bad.

The airbag light needs to be properly checked out, something could have come unplugged however.

 

well, you were wrong about the wheel hub. just wasted 140 on that

 

Did you have it scanned to find out which wheel hub was bad? There are four of them. Any one of them (from what I understand) can go bad and cause those lights to come on.

 

Seriously, you can't just throw money at parts and assume. I gave you the most likely scenarios to get checked out.

I am not sitting with an ABS code reader in your car telling you exactly what is wrong. Just gave you the most common reasons for each problem.