Uploaded November 2022 | Updated September 2026, 4 days ago

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2009 GMC Sierra with a crank no start that several techs unable to diagnose but they are sure it's a Crank sensor signalling issue. Looks like they are right.
This video will be available for a limited time here just so the shop can watch the video on this channel- otherwise it will be on my paid content channel at schrodingersboxqm.com (Schrodingers Box Quantum Mekanix).
Download our free book while you are there!!
The Diagnosis and Understanding: Ignition Systems video is here: schrodingersboxqm.com/diagnoseunderstand-ignition-sys-pt1