Knowledge Base Article
Had a diagnosis test 2 times today the first shows an emissions problem, and my engine light on I was losing power in my car would stop or stall. Ran a second one on my returning trip (engine light) was off after 2 days on. Onstar sent both reports to email. Second one hrs later and all showed no problems. Stalling and no power is a problem and what power I had was less than 21 mph or on the side of the road.