JMS FuelMAX (GM) question Forum Index › Forums › General Discussion – JMS › JMS FuelMAX (GM) question This topic has 1 reply, 1 voice, and was last updated 8 years, 11 months ago by jayno20. Viewing 0 reply threads Author Posts 08/04/2016 at 12:10 pm #200 jayno20Participant Never mind, I got my answer from JMS themselves… “The green light on a gm unit is going to be on all the time, the unit is specially programmed for gm due to the fact that the gm cars have power to the fuel pump controller at all times.” Author Posts Viewing 0 reply threads You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In