So I have a 2006 trailblazer making some very small tweaks to. When I try and write in the truck it times out. If I take the pcm out and use a bench tester I can write works fine. How do I go about fixing this? Do a full system scan with a scan tool not dtcs in any sytem. I can read in truck. I can watch data in truck. Just cant write.
Home made set up very proud of myself that this worked.20240301_135332.jpg