i have an 09 colorado 4cyl manual. in cold weather it sometimes doesn't start. It act like i'm not pushing down the clutch. meaning lights come on but no start. Oftentimes after five ten minutes it will start up. It is an intermittent problem but has only happened in winter. could this be the clutch safety switch or is there a more likely option? thanks in advance and let me know if there is any more info you need.