2003 GMC Sierra

Tiny
ASOLIS
  • MEMBER
  • 2003 GMC SIERRA
Engine Performance problem
2003 GMC Sierra V8 Two Wheel Drive Automatic

reduced engine performance came on in the message center, running fine before, barely moving afterwards
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Tuesday, August 31st, 2010 AT 5:09 PM

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Tiny
WRENCHER1
  • MEMBER
That usually means a problem with the "Drive by Wire" throttle system. It has dual sensors in it and when one malfunctions, it goes to half throttle maximum. Your going to need a professional scan tool, preferably a GM tool to be able to diagnose it properly.
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Tuesday, August 31st, 2010 AT 5:28 PM

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