Does anyone here know of an aftermarket Crank Sensor for our trucks? I recently purchased/installed on on my 2004 Dodge Cummins and it made a WORLD of difference in economy and responsiveness. Not sure if the same concept would work on a Vortec, but who knows. BTW, it works by advancing the timing by 2 degrees.
Here's the link.

http://www.rokktech.com/_mgxroot/page_10437.html