How can i reset my airbag light on 2005 chevy trailblazer

First you need to have EBCM - electronic brake control module check for DTC'S - diagnostic trouble code's . If the light is on there is a code stored . I think most part stores can do this and for free . After you find out what code is stored , looking up that code in service repair information for diagnostic trouble shooting chart would be next step . There are a few codes too.
DTC C0035 or C0040
DTC C0045 or C0050
DTC C0110
DTC C0131
DTC C0161
DTC C0186
DTC C0196
DTC C0201
DTC C0240
DTC C0241 or P0856
DTC C0244 or P1689
DTC C0245
DTC C0283
DTC C0287
DTC C0290 or C0292
DTC C0455
DTC C0550
DTC C0558

Find the code do the diagnostic's , fix the problem , wiring issue's , a sensor , bad module ,what ever it is . The light will go out then . Here is a sample of code discription .
• DTC C0035 Left Front Wheel Speed Sensor Circuit
• DTC C0040 Right Front Wheel Speed Sensor Circuit

Once you fix the problem you should be able to clear the code with a scan tool, and the light will stay off.

YOU HAVE TO REPLACE WHOLE MULTIFUNCTION SWITCH WITH TURN SIGNAL SWITCH, LIGHT SWITCH, WIPER SWITCH HAS TO BE REPLACED.YOU HAVE TO TURN OFF RADIO FIRST THEN REMOVE NEGATIVE BATTERY CABLE.THEN WAIT 20 MINUTES UNTIL AIRBAG IN STEERING WHEEL DISARM.THEN REMOVE THE MULTIFUNCTION SWITCH LOCATED ON THE LEFT SIDE OF THE STEERING COLUMN.YOUR WIPER SWITCH ON THE MULTIFUNCTION SWITCH.

How do I reset my 2004 trailblazer computer.

Turn the ignition to the "ON" position without starting the vehicle. Press the gas pedal in 3 times, holding it in for 2 seconds each time. When the "Change Oil" light flashes, start the vehicle.

you can clear it by shorting battery cables (disconnected of course). but there IS a reason it came on. it's trying to tell you that you have problem. if it were me, i'd be kinda curious as to what it is before i erased the history...

I have a 06 Z71 and it did the same thing so more than likely your just going to have to buy a new cd player. I would recommend going with an aftermarket cd player because you probably going to spend just as much on another stock unit.

You may have to take your vehicle to a dealer because whenever your airbag light comes on, it could be a computer problem. If possible, I would do it a.s.a.p. because there have been cases where the airbag can potentially go off!! Or never work. I'm not trying to scare you or anything, but you just can't really take these things lightly. Good luck, hope all goes well

turn key on in the run position press gas peddle to the floor 3 times with in 5 seconds the wait ten 10 seconds i do these all the time