Where is the speed sensor location on my 2001 gmc sierra 2500

SOURCE: 2007 gmc sierra 2500 IAT sensor

Well, the IAT (Intake Air Temperature) sensor is located on the air intake duct between the filter and the throttle body (Assuming you have the 6L motor). The wires are easily visible at the plug that connects the sensor to the wiring harness. That's the easiest place to access them.

SOURCE: mass air sensor and intake air temperature sensor

They are not the same thing but the air temp sensor is made into the mass air sensor

SOURCE: where is the 4x4 encoder motor sensor located on my 03 sierra

the encoder motor sensor is inside the encoder motor. the encoder is located at the transfer case. Remove the encoder and by part number 88962315 this is the sensor. you will have to retime the motor after
hope this helps

SOURCE: 2003 gmc sierra duramax 2500

Problem with Diesel Fuel System. Gmc 2002 duramax 2500 HD 4x4 will start 

SOURCE: where is oil pressure sensor located on 2001 dodge 2500 cummins?

Hello mhak330: My name is Roger and I can give you the answer to your question. Locate the ECM on the drivers side of the engine.look for the bottom bolt holding the ECM. To the right of the bolt you should see the oil pressure sender unit. Should you need further help please just ask. Please rate the quality of your answer. This way we know you received helpful information. Thank You for using Fix Ya. Roger