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It is part of the throttle body. If you want to replace the throttle position sensors. You will have to replace the throttle body as a unit....Note: There should be two of them in your scan tool data screen.
These are books containing info on repair, service, troubleshooting, parts info, assembling dissemble, removal, error/fault codes, wiring diagrams and everything on any vehicles cars, atv, trucks. forklifts, boats, excavators etc
this is the exploded view of tailgate https://www.gmpartscenter.net/v-2004-gmc-envoy-xuv--sle--4-2l-l6-gas/body--tailgate this is removal and working on an xuv https://www.youtube.com/watch?v=MLQLAD8xOPk
Is your "Service engine soon" light on?? If so, have your vehicle's computer scanned for error codes. If not, Clean or replace the IAC valve (idle air control valve). This unit controls airflow through the engine while the gas pedal isnt pressed or A/C is powered on.
i would say it's long overdue. i would think the manufacturer would recomend changing the trans fluid at 25,000-30,000 miles. the owners manual will have regularly scheduled maintenance routines listed.
Either you have a vacuum leak or electrical issue.
First Inspect all vacuum lines.
Next test engine vacuum (17-21 hg's)
If all a-ok then its electrical and you got your work cut out for ya.Have to probe the circuit to see where its shorting and what its shorting to. I don't think it will be electrical simple because you would be blowing fuses if it was. Sounds more vacuum related..... and thats worse.
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