I brought my truck in 12/11. Told it would be 3 weeks to 3 months b/o. Spoke to the service manager, told me he will keep calling around to find one, also wrote GM and the NTSBA. Got useless emails from GM. Long story short the Chevy dealer called on New Year’s Eve and said the truck was all set! Scary part is GM still emailed me for a couple of weeks after that saying the part was still b/o until I finally told them I got it back. Tells me GM doesn’t seem to know what is going on. So far so good with truck, fingers crossed.