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How to Replace Throttle Position Sensor 01-02 GMC Sierra 2500 Truck

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  1. step : Removing the Throttle Position Sensor (0:44)
    • Loosen the clip on the air intake hose.
    • Pull the hose off and set it aside.
    • Use a 15mm socket and ratchet to loosen the tensioner and pull the serpentine belt from the alternator.
    • Remove the bolt on the right and loosen the bolt on the left side of the alternator.
    • Pry up the alternator to access the TPS.
    • Disconnect the TPS.
    • Remove the two T20 torx bolts.
    • Pull the sensor off.
  2. step : Replacing the Throttle Position Sensor (2:48)
    • Push the sensor into place.
    • Replace the two T20 torx bolts.
    • Reconnect the TPS harness.
    • Push the alternator down into place. Use a flat blade screwdriver to help pry it down into place.
    • Replace the bolt. And tighten both bolts on the alternator.
    • Loosen the tensioner to put the serpentine belt back on the alternator.
    • Reconnect the air intake hose.
    • Tighten the clip on the air intake hose.

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Hi, I'm Mike from 1A Auto. I hope this how-to video helps you out and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.

In this video, we're going to show you how to replace the throttle position sensor in this 2002 GM Sierra 2500HD. This particular part is similar in a large variety of GM models, and the only tools you will need for this is a flat blade screwdriver, T20 torx driver, and a 15 mm socket and ratchet. To get to this, we're going to need to remove a couple of things. We'll start off by removing the air intake hose. You just want to use a flat blade screwdriver to loosen this bolt, and then that'll loosen the clip, and you can pull this right off. You just want to set that aside.

Next what you want to do is you want to get a ratchet onto that, which is the tensioner, and then you want to push that back, that'll loosen up your serpentine belt and you can pull it off of the alternator. Now there's two bolts that secure the alternator, and we'll fast forward as he removes the one on the left side. This bolt on the right, we're just going to loosen up.

Now, using a flat blade screwdriver just pry up the alternator and this will give you access to the throttle position sensor, right there. It's held in with two bolts. You just want to disconnect the connector here by pulling back on that tab, and we'll fast forward here as he just removes those two T20 torx bolts that secure the throttle position sensor.

Then, you just want to remove the sensor. It's the old throttle position sensor on the left, the new one on the right from 1A Auto. They're identical. You just want to line up the sensor. As you can see, you just push it into place and then you want to re-insert those T20 torx bolts. He tightens them first by hand and then he uses the driver to tighten the rest of the way. We'll fast forward as he tightens these up.

Reconnect to your sensor by pushing that clip back into place. You want to push your wires out of the way and push the alternator back down. Then, you can see he uses a flat blade screwdriver to just pry that back into position, line up the holes so you can re-insert the bolt. Then you want to re-insert that bolt and tighten it all the way up. We'll fast forward as he tightens this bolt. Then tighten the other bolt.
Now you just want to put your serpentine belt back into place. You want to put the ratchet back onto the tensioner, push it down, and that will allow you to get the serpentine belt back onto the alternator. Then you want to re-connect that air intake, just push it into place. Then using a flat blade screwdriver, tighten up that clip and then you are all set.

We hope this helps you out. Brought to you by www.1AAuto.com, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll free, 888-844-3393. We're the company that's here for you on the Internet and in person.

Tools needed for replacement:

    Ratchets & Related

  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 15mm Socket

  • Star Drivers & Sockets

  • T20 Driver

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GM Throttle Position Sensor

Throttle Position Sensor DIY Solutions

This part replaces:

  • Standard Motor Products TH149T
  • DIY Solutions ESS00574
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