I've been troubleshooting my 2005 Trailblazer 4.2 I6 Low Beam issue. Great threads by the way! Long story short. I have no Battery 12V to pin 2 on the HDM. If I run battery 12V to pin 4 I still have no low beams. However, if I run 12V to either low beam fuses I get low beams on left and right. Am I correct to assume my fuse block is toast? I'm also starting to have instrument cluster issues with the stepper motors as well as a fuel level sensor error code to boot.The low beam issue was intermittent at first but now permanent. The fuel level code comes and goes when it feels like it. I also have a rough idle/near stall while in rush hour traffic. Any help would be great!