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Discussion Starter #1 (Edited)
Anyone know where I can find a copy of the wiring harness diagrams and ECM pinout in digital format for my 05 LLY?

FYI: Tach signal is ECM black plug "middle" pin 63 Lt Blue wire. Complements of the guys over at PPE.

CORRECTION: Correct pick up for the tach is C3 "gray" ECM plug, Pin 37, white wire.

:cool:

-K
 

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Is this what your looking for?

C1





C2





C3

 
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Discussion Starter #3
You Rock !!

:rockin

Thanks

-K
 

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do you have the schematic for C3?
 

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Pages for C3 ECM Harness added ;)
 

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awesome...where do you get these?
 

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Discussion Starter #7
Just edited my post above on the tachometer pick up info.

The diagrams above list 2 possible "engine speed" wires; plug C3, pin 37, white wire is the one to go with when adding a aftermarket tach on the 04-05 LLY.

Hope this saves someone a few hours in the future.

-K
 

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Thanks

Thanks so much Jonesy181 for the ECM info. I am sure the stealerships want to keep such info to themselves. Thanks again!
 

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This needs to be made a sticky! good info to keep close at hand!
 
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