Driving down the highway at normal rate of speed, the engine light came on and then started blinking and I loss power in the engine. After about 10-15 seconds, the engine light went off and the engine regained power. A few minutes later, the same thing occurred. In the mornings when the engine was cold, the engine would sputter when idling and the check engine light would come on. The dealership mechanics found the problem to be the cam shaft lobe being scored causing piston #5 to misfire. The dealership told me that there are 12,000 backlogged requests for this part. In other words, there is a known defect in the cam shaft. The price of repair is over $4000. This needs to be a mandatory recall by the manufacturer!! 12,000 back logged requests for this part? Really? This is a safet issues because of the engine power loss while driving down the highway. My truck was in the shop at the dealership for 41 days. Ridiculous.