I appreciate all the info that people have put on here. I have an 03 Olds Alero, and I"ve been dealing with this problem for quite some time. It got worse and worse, until I was finally having to reset my system 2-3 times per week. I stumbled upon this forum, and I decided to follow the resistor route that many have suggested. I followed the following steps:
1) Started car and cut yellow wire (Security light came on)
2) Measured resistance. I'm not sure if it was me or the multimeter, but I was having a hard time getting a good reading. My best estimate was ~1500 ohms.
3) I installed a 1500 ohm resistor between the yellow wire and the black wire and put everything back together.
4) I started the car, and my security light is still on. I guess it is in bypass mode, and the resistor I installed wasn't close enough to the value it was looking for.
So, my question is how do I force the BCM to reset when it is already in bypass mode? I followed the normal procedure that I used to follow when the car wouldn't start (put key in "On" position and wait 10 mins), but that didn't do anything. Any suggestions?
Thanks!