Why does my Silverado Sierra have high idle?
Why does my Silverado Sierra have high idle? Cleaned the throttle body and went to put it back on and start it with out the intake attached to the throttle body. It idled funny so I shut it off. How to troubleshoot an automotive engine high idle? The troubleshooting procedure for high and low idle conditions are similar, which are included in the following: Step 1 - If the check engine or service engine light soon has illuminated retrieving the diagnostic trouble codes could lead you in the right direction of what the problem is, or is related too. How...