Originally Posted by red041500
thanks for the FAST response , is it normal that ive never seen the light for my mds ? i asked the service guy about it and he looked at me like im stupid
.... i know there was a thread about the light and i know mine is a early 09 but i know the light is there , but NEVER comes on when driving.
my MDS light comes on all the time in the city or cruising speed on the highway. are you sure your truck is MDS equipped, is it an option or a regular install? I also have 3.92 gears I will go for a run tomorrow at 70mph and check the MPG and RPMs.