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Message: <blockquote data-quote="Starflare5" data-source="post: 25372" data-attributes="member: 2419">Hello there,    What year is your Equinox exactly? This could be multiple issues depending on the year. For example: 2005s and 2006s had severe issues with the Body control module suddenly failing, and therefore, would cause a security issue and not allow the vehicle to start. 2007s and 2008s had issues with the ECMs and throttle body's failing over time. If there is a way for you to get the error codes also, that can also help tell you the issue. I hope this helps.Starflare5.</blockquote>