Question about GMC Sierra 2500HD

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Hi I have a 2004 Gmc Sierra 2500 HD. Ive been reading these forums for a while and triing to solve my reduced Engine issues. I have replaved The throttle body and map/baro sensor along with the OEM pig-tail harness for the throttle body. After I thought all the codes were cleared everything went crazy now the truck imediatly goes to reduced engine power and also runs on after the key is off.

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Take it to a dealer their is a software problem with the ECU ?? what exactly i have no idea sorry for my incompetence here but so many variables involved with a complex mass of silicon chips inside the ECU that i would have no idea whats wrong without the manufacturers CORRECT SOFTWARE for fault finding ,perhaps one of the specialists that repair ECUs might be able to help

Posted on Sep 02, 2010

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Posted on Jan 02, 2017

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