I just bought a used 2008 HHR. Occasionally, when there is a passenger, the "airbag on" light will start flashing, flash for a while and then stop. The passenger's seat belt is fastened the whole time.

 

You might want to check the electrical connectors under the seat, as a starter. GM vehicles are notorious for having a problem with these connectors. Assure they are secure by PROPERLY releasing the 2 parts of the connector (check to assure all the male and female pins are straight and making contact), then reinserting tightly. Afterward, drive with a passenger for a while to assure the light stays off.

 

Before you do anything with the connector under the seat, disconnect your NEGATIVE battery cable for a minumum of thirty minutes to allow the SRS system to dissipate stored voltage which can cause an accidental airbag deployment.

Or better yet, take it to a professional, accidental SRS deployments can severely injure you, or kill you.

 

The seat belt is fastened all the time? meaning somebody is sitting in the seat?

Or, do you think fastening the belt on an empty seat does something? Doesn't anymore.

 

Hey bluesqueezebox,

Sorry to hear about the flashing airbag light in your HHR. If you would like any support while getting this diagnosed we are happy to help! Feel free to reach out via PM with your name, contact information, VIN, current mileage, and involved dealership.

Sincerely,

Jonathan A.
Chevrolet Customer Care