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Reduced Engine Power Message


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32 replies to this topic

#31 Eljefe8669

Eljefe8669

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  • Name:Charles A Williams
  • Location:Arizona
  • Drives:2004 gmc sierra 2500hd gas

Posted 05 September 2016 - 05:10 PM

I buy around 100 chevy trucks a year so I am very familiar with this issue.
 
99% of the time the reduced engine power is due to the gas pedal. I always replace that first. 
 
Second is wiring going to the TB itself. Dorman makes a kit with a new harness and TB motor. I have never seen the motor fail but I have found two bad harness connections.
The third is the TAC Module on the firewall driver side. I have only seen a TACs Module fail once.
 
Replace the gas pedal and im sure all will be fine.



#32 Eljefe8669

Eljefe8669

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  • Name:Charles A Williams
  • Location:Arizona
  • Drives:2004 gmc sierra 2500hd gas

Posted 05 September 2016 - 05:11 PM

I have replaced the throttle body and none of the wires appear to be loose but I do have a new harness. So the next step could be the gas pedal sensor correct?

#33 SpartanAutoworx

SpartanAutoworx

    GM Truck Salvage King ;)

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  • Name:Erik
  • Location:St.Louis
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  • Drives:LSA Swapped 2500HD Silverado with Prior Salvage Title -_-

Posted 06 September 2016 - 11:01 PM

Replace the entire gas pedal. Its around $60 brand new wholesale from GM. Not sure what list is on it.


GMT-800 Parts and Factory Module programming specialist  :pimp:

2004 Silv2500 2WD LSA Swap with LSX Precision Adapters and Front Runner Kit

2001 SIlv2500 2WD Turbocharged by LSX Precision with LSX Precision Turbo Manifold 

 





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