Airbag LIGHT stays on 2002 Chevy Trailblazer?

Answer 1

I am a shade tree mechanic. You should take your car to a shop to have proper diagnostics run as your problem probably means the trailblazer air bags will not deploy in the event of an accident. If they do deploy order a replacement from http://www.safetyairbags.com/trailblazer-airbags.html In fact, it's almost guaranteed they won't function.

There is only one thing I know of for you to check yourself. First, shut down the vehicle and wait 5 minutes. I believe this will allow the emergency charge for airbag deployment to dissipate, but I could be wrong. Better safe than sorry, right? Now, check fuse #18 under the hood to see if it is blown. If it is, I would strongly suggest having the cause rooted out by a service person. However, a loss of power to the system will cause the dash module to turn on the airbag light and keep it on. Replacing the fuse may just waste the next fuse, but as long as they are the same fuse, try it out. When you turn on the car next time, stay clear of the air bags in case they pop unexpectedly. See why I suggest taking it to a qualified mechanic?

If the fuse is not blown, the next step in the process is connecting a computer capable of connecting with the various modules which is expensive. The $40 computers at wall mart will not do this. A mechanic will have to use that computer to see at what point the system is broken. If the SDM is dead, it will not be communicating with the rest of the system. If for some reason other than the fuse it is not getting power or ground, it will not turn on. These conditions will cause the light to come on and stay on. If the SDM is not dead, there may be some other module or sensor which is not working properly.

Unfortunately this is both an expensive problem, and one that is not normally advisable to folks like us who have to ask for help with it. My guess is if it's the SDM, the problem is in the $500 range. It could go upwards of $1500 depending on what is actually At Fault.