I assume you mean the sensors related to the SIR (airbag) system?
There are two discriminating sensors left and right, just in front of the radiator along the crossmember, and one arming sensor module above the transmission, at the center of the transmission crossmember.
No inertia switch.
Gm does not use inertia switches.
No.
my 92 is in the trunk.
what's the problem
The 1992 Chevrolet Astro Van ECM can be tested with a diagnostic tester. Most auto mechanic shops have diagnostic testers.
No, it does not have an inertia switch.
GM vehicles are not equipped with an inertia switch.
No, Dodge does not use inertia/reset switches.
Inertia switch is at the right rear side behind a panel just between the back seat and the tail gate.(inside the car)
you need to remove the window motor then you can just move it by hand,my 92 astro van is the same way
I have a 92 Astro van with 197,000 miles. I have had nothing major go wrong with it. It has served me well. I also have Astro 2004 AWD with 191,000 miles with very few problems. I also know someone with 1996 Astro with 287,000 mile, doesn't look like much, but, works well.