Q: dashboard lights and stalling problem

My dashboard lights haven't been working very well lately. They are getting worse every week. When I turn the key to the on position my dash lights will come on, but other times it can take anywhere from 2 minutes to 40 minutes to come on. They don’t come on when I try to start my car and it only cranks, starts for a few seconds then stalls. I bought a new battery, a new GM ignition switch, new GM ignition passlock – just the sleeve that goes over the ignition key. I tried programming the car by following the GM guide. Then I started my car and kept the key in the on position until the security light went out, but that light never went out. I had the car on in the on position for 40 minutes. So nothing has helped my car start any faster. I ordered a GM passlock security bypass kit. I wonder if this will help. Do you what could be causing this, and how I can fix it? It's so frustrating!