Yea the address lines are switched on the chip but if you can flash segments then you can read them out as well (the theory i'm trying to prove). Nothing super top secret here, just a small hurdle. The Seed/Key is GM's built in security you need to authenticate to read/write over the Class-II data line. I'll know within 4 days if it's successful or not because that's the max time the 256x256 algorithm script could take to run with the built in delays. I started a brute force Seed/Key search against the 6.5 OBD2 PCM last night. I'll be grabbing one soon if I get thru the security because the R/W is too slow without a 4x connection. Make posts that actually helpful for the community instead of pushing away business.:Īn AVT-85x cable can be had for around $250 that will do the J1850 PWM switching between 1x and 4x. Don't jump down my throat when you had the same outlook on an issue at one point. Here's you proposing the same challenge against a vendor's pricing, by the way. Please share your tuning testimonials.I've been around for awhile and never heard of your 6.5 tuning expertise. I'll admit that as long as someone proves it's a limit of the PCM and not a limit of the TunerCats implementation. The only thing I was wrong about is that you can only write the 6.5 PCM and not read it.

Now, this is geared toward single users and shops. Can also buy files from vendor(s) and edit them if they aren't locked. HPT - 8 Credits Included - Comes with Cable - You can then create files and write them. This forum is geared toward single users since vendors don't share their proprietary knowledge (with good reason usually). I apologize for calling your cable a ripoff, but as you mentioned, it's not suited for single users. This thread isn't complaining about you 's generalizing how tuning has evolved over the years and become more accessible.

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