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GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15133
Experience:  GM Grand Master Technician 2007. 14 years experience.
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1994 Chevy silvrado the check engine soon light come on in

Customer Question

1994 Chevy silvrado the check engine soon light come on in idle only have replaced the IAC and the code still says 35 replaced wiring harness as well 3rd one reset each time still comes back have taken to shop and still says IAC possible bad ECM?
JA: Does the light stay on, or does it blink?
Customer: stays on til I start driving then goes off
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: have replaced the IAC and the code still says 35 replaced wiring harness as well 3rd one reset each time still comes back have taken to shop and still says IAC
JA: Anything else you want the mechanic to know before I connect you?
Customer: could it be bad ECM
Submitted: 4 months ago.
Category: Chevy
Expert:  AZTechBrian replied 4 months ago.

Hello. Were the IAC passages cleaned out?

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