I have a 2000 chevrolet blazer with an airbag light on,wondering where the module is located physically and how to reset it,replace, if i should,etc...

If the Airbag light is on then unless the battery was disconnected you have a fault in the Airbag system and the control module turned on the warning light. There is no reset for a fault, you must read the code with a scan tool and repair the problem and then the light will go out.

normally if a car has been in a bump and the air bags deployd a new air bag moduel is needed thats why it cannot be reset

The airbag in your vehicle is an important safety device, and the airbag module ensures the proper functioning of your vehicle's air bag. If this module is not functioning properly, your airbag may not deploy during a crash. When there is a malfunction, your airbag module warning light will illuminate on your vehicle's dash. You will need to have the airbag assembly checked out by a qualified mechanic, but once that is done, you can reset the warning light and airbag module unit. If you've never done this type of job before, it should only take you 5 minutes.

1. • 1 Open the hood and loosen the retaining nut on the negative cable wire cable clamp using a socket wrench.
     
   • 2 Slide the cable clamp off the negative battery terminal.
     
   • 3 Wait 3 to 5 seconds and reconnect the battery terminal. Tighten the retaining nut using a socket wrench. Once the power is restored, the airbag module should be reset.
     
   • 4 Verify that the module has been reset by turning the ignition key to the "II" position and checking to make sure that the airbag light does not illuminate.
     

Check the crank sensor first.

if the light is on there is a fault in the airbag system and the control module has turned the airbag system off until the system is repaired, there are about a 2 dozen problems that cause the light

reset the battery wait about five minutes before hooking it up...this is sounding like a computer problem.

The passenger side airbag is a lot easier then driver side. Take the glove box out and you will see two 10mm bolts holding it in place. When you open the passenger side front door, remove the panel on the side of the dash and you will see yellow connectors.The 1 closest to the front is attached to the air bag, it is clipped into the frame. Just pull it loose and take it out and your done. For the Driver side, it takes a skinny T27 to remove the two star bolts, then just disconnect the horn red clip and ground and install new airbag. The module is located under the passenger seat, underneath the carpet. Kinda stupid but thats where its at. You also need to replace the front impact sensor located behind the grille on the back side of the metal bar to each side. Follow the hood latch down. Also just to make sure, you know to disconnect the battery before you do all this. You don't want new airbags to accidentally deploy.

This is common on the beetle. More than likely it's diagnostic trouble code 00591 E24.
It will need to be reset with vagcom or vcds software. A few known trouble areas on the beetle that trigger this light are the seat belt buckles and the wire connectors under the seat. I've seen the connectors get loose and not make contact, and in one case the wires severed from sliding the seat. You might check this before you clear and reset.
Good luck...i hope this helps.

somtimes you can take the ground cable off battery for a minute and it will reset check engine light

check the crankshaft sensor