Where do i find a knock sensor a 1993 gmc sierra

https://www.google.com/search?q=Where+is+the+crankshaft+sensor+on+the+2005+yukon+denali&biw=1364&bih=650&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwi4veC_rvzQAhWLw1QKHYQKCDQQsAQIGQ#tbm=isch&q=Where+is+the+door+lock+relay+located+on+a+1993+gmc+sierra+sle

Hope this helps

Between the abs, transmission,engine, air bags , seatbelts, way to many to count off hand,what sensors are you asking about?

I believe the 93 Sierra has only one O2 sensor. It is in the manifold on the drivers side. This assumes the 5.7L motor.

do not need

under the intake plentium right in the middle of the valley between the heads. bad for wires getting corroded and rusted. it holds water in the knock sensor holes, you can buy the harness

Check manifold pressure sensor if present.
Check MAF sensor.
Check water temperature sensor.
Check O2 sensor.

Oxygen sensor[s],map sensor and fuel pressure regulator.Although you should have a check engine light "on" with any sensor malfunction.I would look at fuel lines for a leak under vehicle.

make sure they sold you the!! right 1 first off! and make sure the wire has continuity to the plug on each and and is securely fastened to the sensor also check to see if you knocked a wire off at the ignition module that controls the dwell

I will be able to tell you. Just need to know if 2x4 or 4x4 and if it is 1500,2500, or 3500

Autozone.com and free registration = full free online repair manual

the knock sensors are located below the intake plenum,or,upper intake manifold as some call it, they screw into the lower intake, the front one is sensor 1, the rear is sensor 2. it is wise to change both if you have some miles.since you are going to be buying a gasket set to do this job.the sensors are cheaper than the gaskets.