How to Replace Throttle Position Sensor GMC Yukon

*Check out the tools we used below. If the video was helpful, please give it a "thumbs up" and consider subscribing to the channel.*
This video goes over how to replace a throttle position sensor on a 2008 GMC Yukon with a 5.3 motor. This should be the same process for any (3rd Generation) 2007-2014 GMC Yukon with a 5.3. When you get a PO122 code like we had, it means that the throttle position sensor has a low circuit input and the voltage is below the sensor's anticipated range. A throttle positioning sensor is activated when the vehicle's accelerator is pushed. The throttle position sensor is then used to measure how to open the throttle valve, and therefore controlling the correct amount of air flow going into the engine intake manifold. Signs of a bad throttle positioning sensor would be a check engine light, idle surges, stalling for no reason, hesitation while accelerating etc.
Tools needed:
Socket Set - - amzn.to/3siaIJg
Screw Driver Set -- -- amzn.to/3SbtyMX
Hand Cleaner -- -- amzn.to/3jkXlBk
Rubber Gloves -- -- amzn.to/35STq6Q
Shop Towels -- -- amzn.to/3y2KwzR
Parts:
Throttle Position Sensor - -amzn.to/3QdvT7x
These are the tools we used or something that’s similar. There are many manufacturers and various prices. It's a good idea to buy the better tool with the best warranty and easiest in case of tool failure.
Disclaimer:
The Auto Teacher assumes no liability for property damage or injury that happens as a result of any of the information contained in this video. Any information learned from this video is to be used at your own risk. The Auto Teacher recommends safety first! Protective gloves, safety glasses and jack stands are highly recommended. These tutorials are made strictly to help people with their car projects and are given to provide factual information we’ve learned over the past 40 years working on cars. We do not guarantee any particular result or any particular warranty. Any injury, loss or damage contained by the viewer while attempting to follow the video’s instructions is solely the viewer’s fault and not The Auto Teacher.

[@unknownunknown797]

Good job brother 2007 yukon Today's code/ cleared P1123 was the air mass flow sensor cleaning

[@TheAutoTeacher]

Glad it helped!

[@dannyb8504]

Mines throwing a P0121 code but my buddy was telling me that after you change out the throttlebody that you have to get it programmed or else it idles at 2000 RPM it has to relearn is that correct or no???

[@miker0257]

Do you have to reprogram the throttle body after doing this?

[@lofolofy355]

Great work

[@TheAutoTeacher]

Glad it helped!

[@edwinaquino9291]

You dnt need to calibrate the tps?

[@TheAutoTeacher]

Not usually needed, but if deemed necessary the easiest way to reset your throttle position sensor is to unhook the negative cable from your battery for up to five minutes or to remove the fuse for your ECM.

[@INTERCEPTED__]

So me putting wd40 on rag to clean my throttle body on 08 suburban wasn’t a good thing?

[@INTERCEPTED__]

I had a high idle call myself trying to cleaning it , it was normal then the needle would drop down (at idle) then shut down … had a cold front in Louisiana so I have to jump it tomorrow or Saturday and try to look at ya videos and figure it out

[@TheAutoTeacher]

Cleaning the throttle body properly will help improve the idle, acceleration, fuel efficiency, and any potential issues with stalling. Use a throttle body cleaner that is specifically made for this application and use a toothbrush and a rag. Depending on mileage and condition it might be necessary to actually remove the throttle body.

[@TheAutoTeacher]

I'm sure it works, but using a throttle body cleaner that was specifically made for this application would do a better job.