LOCATION OF THROTTLE POSITION SENSOR IN DENALI

2006 GMC Envoy

Tiny

teschofield

October, 16, 2011 AT 6:07 PM

Check engine light on
took car to Auto Zone and they said the code P0121 is the throttle position sensor
car skips or bucks from time to time while driving

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4 Answers

Tiny

Jacobandnickolas

October, 16, 2011 AT 6:09 PM

It is on the throttle body.

Tiny

Wrenchtech

October, 16, 2011 AT 6:30 PM

This truck has a "drive by wire" system and the TPS is internal to the electronic throttle body assembly and is replaced as a complete unit. You are looking at a job, probably well over $500 and it will require some sophisticated diagnosis to confirm if that's what it really needs.

Tiny

darrenvertrees

August, 16, 2012 AT 3:44 AM

Wrenchtech I will have to say that I do not agree at all, the ac delco part can be purchased on ebay for around 130 and can be installed in fifteen minutes, im glad I dont run my shop how you described this, I can sleep at night and I wouldnt charge anything over $200 for this simple procedure including the learning procedure for the new TB

Tiny

Wrenchtech

August, 16, 2012 AT 9:43 AM

Well, Darren, you keep buying your parts on E-bay. That should work out real well for you. Since this question is a year old, I expect this problem got resolved without your bad advice.

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