Got in my 04 Tahoe this evening, started it right up, drove it literally 2 blocks away. Parked it fished for about 30 minutes. Started it up, noticed my AC blower wasn't working all the sudden, also my ABS light is on now, along with the brake light and I'm getting a service 4wd message and push button 4wd selectors aren't lighting up. Everything was fine. It had been a little over a week since I had drove it. I've checked every fuse and they're good. I disconnected the battery for 10-15 minutes and issue is still there. Also the brake light doesn't come on right away. It takes about 10 seconds for it to come on after I start it. It seems to drive fine but I don't want to drive it too far with the service 4wd message coming up so I guess my question is any idea what is causing all these things to happen all at once and any solution to fix it. Troubleshooting tips would be helpful as well. Thanks in advance!