Festy I appreciate the time you've put into this, I'm definatly in the dark on the "algos"... From what I've read (take with a grain of salt) the "algos" retrieve the potential values +-8 min of trying 2trys @ 10 sec intervals vs. the seed. When I saw the frequency of the bytes t...

Still working on this when I have time, I'm new to VB and making slow but really good progress. I'm Defiantly going to need the BIG BRAINS to fine help fine tune the program, but that's the beauty of OPEN SOURCE. I plan on doing some 411 PCM testing with GMOS this weekend to see what it can do. I'll...

Well... Im not sure about anything at this point I have a 411 PCM from an 02 tahoe Osid# 12216125 Vin# 1GNEK13Z32J171183 (THANKS PlanetHAX) my seed key is 66 7E 14 E7 here are a few more seed/key combos but im not sure if they are reliable source for seed key combos as they may be modded. seed key 3...

Today, got the ELM327 to TX/RX in hyperterminal at 115200 took some coercion but it obliged eventually. I did a lot of hyperteminal testing and I think I've reached the point where I need to turn to software to start doing some of the work for me. Especially because after A0 mode time is short. I'm ...

The bootloader is already in the pcm. You need to unlock the pcm, upload your code to ram, set the bootloader to execute from ram next cycle, then reset the pcm, then talk to your own code on the pcm, and take it from there. I like the info antus i'm still learning every step of the way on this pro...

Jezzab thanks, I think I have a "bootloader" (upload routine) that will work, just need to get the right COM setup in VB (visual Basic) working to test it. If you or anyone has a bootloader for gm obd2 I'd love to check it out. DR. Bob very interesting stuff thanks. Anyway still hard at wo...

Well, got a lot of testing/reading to do to verify messages TX and RX strings and what they mean/do mostly that I don't missstype an entry. The more that's written down the easier it will be to create error and success messages when the FLASH program is developed (crossing fingers). If anyone follow...

Wow thats good info! thanks.

I've scoured the internet in search of an open source PCM flash tool. The closest i've come to seeing one was made by planethax (with help) on this site. I've gathered a treasure trove of information regarding GM obd2 VPW protocol and the intel 28f400B but haven't been able to get my bin. That said,...