My 98 Suburban has had some brake issues since I bought it. Spent some hours trying to fix it and diagnosed a bad ebcm. Took it into my mechanic buddy and without telling him what I thought, he found the same problem. He says that they are impossible to find a replacement, and even most junkyard...
I Second the turn signal switch. I had a similar problem on my suburban. All of those circuits are run through that switch. If you test for voltage at your lights and have none coming in when its supposed to, you have a problem with the switch or the fuse. 1a auto has a really great how to...