I have a 98 blazer with 183,000 on iut. Hasnt given me any problems until recently. My door alarm will get very high pitched and it enables the security system. When I go to start the truck, it turns over and statrs but dies immediatly. If I pull the TBC fuse under the hood, and put it back in it fixes the problem for a day or so.... Alos, the security light will come on at times, and again if I pull that fuse, it goeas away for a while...Please help im stumped!!!!

GM has Passlock so that is activating. Heres some info and it tells how it works. Probably have to go into the column to fix.
http://www.bypasskit.com/product.aspx?prodid=PLDATA&catid=3#