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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.Attachment 143475
What brand is your aftermarket radio/chime adapter?
(p.s.: https://forum.hptuners.com/forumdisp...-Tuning-Engine)
So I did do some reading about that. The truck came with an aftermarket radio. I had a draw problem a few months ago so all that got removed. I no longer have door chime. Dose the factory radio have to be on the bus system for some reason? I didn’t want to put in the I6 topics. seamed more like a bus problem?? Maybe common problem amongst chevy??
Did you resolve this issue?
about 4 times a year I have to repin customer DLC's cause they won't read. Maybe the pins are worn out at the DLC.
06 Trailblazers are usually pretty solid about reading/ writing.
No, I’ve just been using the bench tester. I may start pulling fuses for other control modules. On some other forms/Facebook groups this was the fix. Some even clam it was a tsb for the trailblazer but can’t seem to find that tsb. It’s a problem with too much chatter on the class 2 line I assume. It will read the pcm fine. Erase the pcm fine but won’t write.