Originally Posted by larry5061
To all you that have turned off the MDS, does your fuel saver light still come on?
I have an 09 1500 and just got my in Tune thought I turned off the MDS but light light still comes on. Need input.
The ECO light doesn't indicate that your MDS is functioning, it's actually totally separate, it simply means you are driving in an efficient manner. IE: light on the pedal.