98 GMC Sierra


98 GMC Sierra Mechanic's Assistant: What year is your GMC? 1989 Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far? I changed my idle control value and it still won’t start <b...

98 GMC Sierra Mechanic's Assistant: What year is your GMC? 1989 Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far? I changed my idle control value and it still won’t start Mechanic's Assistant: Have you checked the battery, particularly the terminal connections? Are they corroded? Yes they are not corroded

Automotive Expert
Hi I'm Bart. I'll be helping you today. So is this an 89 or 98?

It is a 89
Automotive Expert
So will it not start at all or just not idle?
Automotive Expert
Phone call session started
Automotive Expert
Based on our conversation, I suspect the IAC is not being controlled by the ECM or there is another underlying issue with the [engine](/topics-engine-chevy/).

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