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Google great for looking, not so good for finding. Cannot locate P/N and parts stores say no longer available. Any other choice? Know now early 1990s have vacuum pump with speed sensor,but nobody shown availability. Is this cam driven? I cannot even find a .picture. HELP!

OK I googled it too, But looking

Get this where? GM product? What years/models? Have you done this yourself? Where did you get your vaccum pump with speed sensor? Thanks

Thanks, but wrong connector. I'm talking connector C4, engine rpm signal.

Vac pump with speed sensor in it? No idea such a thing exists. What year diesels have this feature?

Thanks, but I'm talking about connector C4, not C5. I have the installation guide, but it doesn't address diesels.

Hello all! I see many threads on M1008 4L80e conversions, but they all lack detail. Maybe everyone writes a check, but I do my own. SO.... Have 4L80e and GM Supermatic Controller. Problem is, where to get needed input signals. How, specifically do I get the following. 1. throttle position...