If that S10 has a 4.3 engine, I find it best to remove the distributor to gain better access to the oil pressure sensor.
If it is a 1997 S10 4.3, with the engine running, remove the fuel pump relay, if the engines stops running, the oil pressure sensor is bad.
knock sensor
it is under the distributor.
Remove the tail gate then replace water temperature sensor.
It is not an oil level sensor it is an oil pressure sensor. It just unscrews.
Locate the crank sensor behind the vibration damper (crankshaft pulley). Unplug the wire harness connected to it. Remove the small bolt holding the sensor in place. Remove the sensor.
To drain the oil on a 1991 Chevy S10 Blazer, located the oil pan drain plug. Use a wrench to remove the plug and the oil will flow into the receptacle you have provided.
It is about 3 inches long with an electrical connector on the end of it. It is back by the right hand side of the distributor. Hard to see.
The 1994 S10 uses a MAP sensor, not a MAF sensor. We need to know size engine you have in that S10.
Drain oil from oil pan, remove oil filter through access door unde raditator.
Depends on which motor? On the 4.3 v6 it is next the dist.