The ses light comes on when the truck drops to an idle. The brake light will also come on occasionaly. The brakes feel fine and there is plenty of fluid in the resivior. Any help would be greatful. Thanks in advance

Go to kennedydiesel.com. Look under tech tips for 6.5 engines. It will tell you how to read codes off of the computer. That will help us point you in a direction why that pesky light is coming on.