Where is the location of crank sensor on 2001 8.1 liter Chevy suburban?

The crank sensor on a 2001 Chevy Suburban 8.1L is located on the passenger side of the engine block, near the bottom of the engine, typically near the flexplate or flywheel. It's usually a fairly straightforward location, but access can be somewhat tight. You'll likely need to get under the vehicle to see it clearly.

Important Note: While the general location is as described above, the exact positioning can vary slightly depending on the specific engine configuration and any aftermarket modifications. A repair manual specific to your year and model Suburban would give you the most precise location and visual aid. Using a repair manual is highly recommended before attempting any repair or sensor replacement.