If it has a 4.3L engine the temp sensor is located next to the thermostat housing.
Haynes makes a manual with the wiring schematic for the O2 sensor on a 1991 Chevy Blazer S10. The manual can be found at most book stores.
Remove the tail gate then replace water temperature sensor.
It has 1 coolant sensor, 1 temperature sensor
You won't find one. The 1991 Chevy S10 doesn't have a MAF sensor.
The idle sensor on a 1991 S10 4.3 can be located at the engine bay.
The temp sensor for the ECM (engine control module) is next to the thermostat housing.
The 1993 Chevy S 10 Blazer 4.3 liter engine temperature sensor can be grounded to the engine block. You can use the temperature sensor retaining bolts to ground the temperature sensor.
The VSS is located in the top left hand side of the transfer case.
The automatic transmission fluid temperature sensor on a 1997 Chevy Blazer S10 is located on top of the transfer case. It is in the engine compartment.
The 1994 S10 uses a MAP sensor, not a MAF sensor. We need to know size engine you have in that S10.
If it is a Vortec it will be inside the tube running from the intake to the air filter it is a rubber hose with this stuck in it!
1991 Chevy s10 how to replace outside window weather strip