Gm Seed key algorithms

Post by **antus** » Wed Aug 03, 2022 3:38 am

I think efilive keys should be standard, so it was probably locked by the tuner. just boot it in recovery mode and do a read in pcmhammer and look at the word at 0x4002 or 0x6002.

VX L67 Getrag · Post by **VX L67 Getrag** » Thu Aug 04, 2022 8:40 am

Ahh cool thanks heaps for that info Antus!

[email protected] · Post by **[email protected]** » Thu Dec 15, 2022 3:21 pm

Hi,

I have problems with a seed/key for Saab and Opel ESP unit models around 2008. I have 2 pairs but can`t find any algo match. Anyone that have this? Seed request is level 0x27 03

seed 0x1E3A key 0xBDFF
seed 0xBB55 key 0x1890

If any one have something let me know

Regards Micke

Gatecrasher · Post by **Gatecrasher** » Thu Dec 15, 2022 8:11 pm

27 03 is DVT access. Those were only ever used internally at GM, so I don't think the algos ever got out in the wild.

[email protected] · Post by **[email protected]** » Fri Dec 16, 2022 12:13 pm

Gatecrasher wrote:27 03 is DVT access. Those were only ever used internally at GM, so I don't think the algos ever got out in the wild.

Oki strange they use it for this cars

The TechII calculate it.

Post by **antus** » Fri Dec 16, 2022 12:23 pm

a similar approach as documented in post #1 but on the saab card might get results.

Gatecrasher · Post by **Gatecrasher** » Fri Dec 16, 2022 2:20 pm

Well that's interesting. GMs own documentation says it's for manufacturing.

This is the requestSeed level for enabling vehicle manufacturing specific device control restrictions (as opposed to having service device control restrictions enabled).

Sounds like someone needs to get into one of those Tech2 cards and dig out the algo.

[email protected] · Post by **[email protected]** » Fri Dec 16, 2022 2:59 pm

Gatecrasher wrote:Well that's interesting. GMs own documentation says it's for manufacturing.

This is the requestSeed level for enabling vehicle manufacturing specific device control restrictions (as opposed to having service device control restrictions enabled).
Sounds like someone needs to get into one of those Tech2 cards and dig out the algo.

I have cards with DB extracted from bin if someone like to dig

Thats not my biggest skills:-(

Post by **Tazzi** » Sat Dec 17, 2022 1:23 am

[email protected] wrote: Oki strange they use it for this cars The TechII calculate it.

Is it used at any point for updates or programming sequences with GMs online techline?

[email protected] · Post by **[email protected]** » Sat Dec 17, 2022 6:14 am

Tazzi wrote:
[email protected] wrote: Oki strange they use it for this cars The TechII calculate it.
Is it used at any point for updates or programming sequences with GMs online techline?

GM online techline i don`t know what it is. The seed/key is used when you re config ESP unit. Se can logg.

Gm Seed key algorithms

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