Some weird issues on a 02 Duramax

[JohnC]

Hey guys. We have a 02 2500HD Duramax at our store. This has been an issue for a while, and I'm not the one that drives it everyday so it doesn't really bother me. However the last few weeks I have driven it more, and it really bugs me now. The emergency brake light, and the ABS light will come on and stay on for a long period of time. I haven't found anything that would trigger them to come on. I was wondering if anyone knew if it was a sensor that is bad, or going bad. It doesn't seem to have any affect on the truck just the lights stay on.

Also the tow/haul button on the shifter doesn't seem to work anymore. It was working fine, and now nothing. I haven't tore the steering column cover apart to see if maybe a wire has broke or come loose, just thought I would see if anyone else has had a similar problem, and narrow down my search.

Thanks.