GM has no intention of getting the airbag recall completed. I have been fighting GM (by phone) and the dealer for months requiring a lot of wasted time. Nothing is done. The blame is always passed on. They say not to call them until they call. What good is a required recall if there is no redress for the problem? I even performed all the tests in the service bulletin and told them so they would know what my 08 needed. Is there not a legal requirement for GM to service ans fix the problem? God forbid that the lack of service for this issue would resulr in injury or death of a passenger in an accident.
I understand your frustration. GM does have an obligation to resolve this problem and they have begun the process. That's where it gets complicated.
Adding the "reinforcement" is a simple process, provided your sensor is not broken. They test the system and if it is working, install the reinforcement. If the sensor mat is broken, you need to wait for the parts to be received. (This may be longer if you're in Puerto Rico.)
The availability of the replacement sensor mat appears to be the hold up. If you're one of the lucky ones that received a sensor early in the recall, you're set. If not it appears you're going to wait for a while. That begs the question "why wouldn't replacement parts be available?"
About 25 years ago U.S. car companies started demanding that their suppliers pay for tooling. The supplier of a sensor, for example, adds some to their piece price to recover the cost of the tooling, usually over the period of a couple of years. If they sell enough sensors, they get their money back. But what if that car company goes bankrupt and leaves the supplier with a bunch of unpaid bills for sensors they've delivered and haven't been paid for? If the supplier isn't one of the "big fish" they won't ever get paid. Since they owned the tooling they can scrap it for whatever they can get for it or opt to hold onto it.
If the supplier is asked to make more sensors in the future, the supplier is in control as they own the tooling and want to get paid back for everything they were owed at the time of the bankruptcy. Or they could tell the car company to pound salt where the sun doesn't shine and the car company has to have someone else build tooling (which can take an extended period of time) and validate their new sensors.
This is CRITICAL step. GM already has a potential liability issue. If the "new" sensors are not carefully validated, they could just be replicating the existing risk or actually INCREASING the risk with the new sensors.
I wouldn't say GM is resisting correcting the problem nor are they intentionally dragging their feet. They're not rushing it either - both for valid risk reasons and, of course, costs.