If you are refering to the temp blend door actuator, it is located behind the dash on top of the HVAC box. The dash assembly must be removed to gain access.
The 1997 Chevrolet blazer actuator switch is located on the firewall in the engine compartment. The switch is on the passenger side of the engine compartment.
under the battery plate
The oil pressure switch on a 1998 Chevy Blazer is on the side of the engine block. It is located above the oil filter.
Located under right kick panel
The vacuum switch/actuator for the fan shutter is under the dash directly below the radio . IT is NOT easy to get to.
where is the fuel pump inertia switch located on a 2000 blazer
They were not used on Chevy trucks.
On a 1998 Chevy Blazer, the parking brake switch is located on the top of the parking brake assembly. There are 3 bolts that hold the switch to the parking brake assembly.
under the battery,those are crappy if you want more info on how to go to S10forum.com,in the 4x4 section they have a manual switch that's better.
Under your battery tray
on the front axel
There is no "kill switch" on that Chevy Blazer.