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Home >> GMC >> 1994 >> C3500 HD 7.4 N, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 7.4L >> Trouble Code Charts >> Code 35, Idle Speed Error >> Throttle Body

July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Throttle Body

Remove IAC and inspect bore for evidence of IAC valve dragging.

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