I have the same truck and had the same problem. since it has 4-wheel disk brakes there are drum brakes in the rear as well. on the back side of the brake system (inside the wheel) there is a little dust cap (kind of a long oval shape) that you can take out to get to your e-brake adjuster knob. the left side is a little harder to get to but take that cap off and turn that knob about 8 clicks with a small screw driver it should tighten your e-brake. its not that hard or you can have your local brake shop do it. good luck. post of you have any other questions.thats what i thought. thanx for the reply.