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2009 gmc sierra 5.3 2WD idles at 3000 rpm after cleaning TB…

Customer Question
2009 gmc sierra 5.3...

2009 gmc sierra 5.3 2WD idles at 3000 rpm after cleaning TB and same after replacing TPS.

Mechanic's Assistant: How many miles are on the car? What size is the engine?

139,111 5.3L

Mechanic's Assistant: Are you fixing your Sierra yourself? What have you tried so far?

Clear whatever code, run at idle for 3 mins, shut off engine for 60 secs, let idle again.not done the drive cycle since at 3000 rpms, ecm will not let tranny/engine go into Drive

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Thats it

Submitted: 8 months ago.Category: GMC
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Answered in 14 minutes by:
11/9/2017
GMC Mechanic: Gary, ASE Certified Technician replied 8 months ago
Gary
Gary, ASE Certified Technician
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Satisfied Customers: 18,019
Experience: GCM master tech over 25 years
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Welcome! My name is ***** ***** I will do my best to assist you with this problem.

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GMC Mechanic: Gary, ASE Certified Technician replied 8 months ago

any codes set ?

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Customer reply replied 8 months ago
The initial code was P0121
GMC Mechanic: Gary, ASE Certified Technician replied 8 months ago

any codes now ?

it was not idle this high until the throttle body was touched ?

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Customer reply replied 8 months ago
Correct.code was thrown, code erased with autozone scanner.Throttle body cleaned, high RPM, TPS replaced. Still high RPM.
GMC Mechanic: Gary, ASE Certified Technician replied 8 months ago

at this point the issue has to be the throttle body itself or the connector at the throttle body causing this issue

at this point it best to replace the throttle body and connector at the throttle body that should fix this issue you are having

please dont forget to rate me here at Justanswer you can always get me back for FREE for any follow up any time with this question even after you rate me here at Justanswer if you have any questions please ask as i do not get credit for my work until you rate me here at Justanswer
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GMC Mechanic: Gary, ASE Certified Technician replied 8 months ago

how are you making out ?

please dont forget to rate me here at Justanswer

you can always get me back for FREE for any follow up any time with this question even after you rate me here at Justanswer

if you have any questions please ask as i do not get credit for my work until you rate me here at Justanswer

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