[Tyler Townsley]

Originally Posted by Merlot566jka

Hey guys, how does the lt5 get its crank trigger pulse for the icm?

The LT 5 is not a GM derived design is is a LOTUS design with very little copied from existing GM ignition designs.
The timing notiches are cast into the crank and picked up from a sensor.
Here is an explaination from the service manual.

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Tyler