- 2015 Buick Lacrosse
Check Engine light came on. Recieved text/email for Emisions System. Check has cap and ensured proper fit. Light went off the next day and came back on 3 days later. Research says bad gas cap and/or evap unit under hood. Anyone else delt with this fault? How severe is it and what should I do first to resolve. Thx in advance for the assist. Happy Turkey Day.