Help with 2005 Chevy Astro

[1hot07gti]

Doing an alarm remote start for my fathers work truck.. the only wire giving me trouble is the tach wire... I cannot find it for ****.. if anyone can possibly tell me a good location to grab a tach wire..i tried tachless and bumpin crank time and everything nothing is working so i have to grab tach... i cant get to fuel injectors because of how motor sits... so thats out the window... and i couldnt find the wire on pcm...according to tech sheet it was white at pcm... if anyone knows any place else to grab this wire it would be greatly appreciated...

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