Unfortunately there are several places for the leak to come from. The scan tests only reveals the origin of the problem. You will need to have a repair center perform a smoke test to diagnose the problem before anyone can give you an accurate estimate.
RepairPal Certified shops can diagnose and repair your 2006 Chevrolet Equinox. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
it was the gas cap a new gas cap fix it