I have the exact same problem as your truck. Did you ever find out what caused this and what solved the problem? Please tell me anything you may know because my truck has already been in the garage three times. So far what the garage has done has not solved the problem! Please help!
My truck is a 2002 Chevy Silverado Pick-up Truck. V8, 6.0 liter engine, K2500. 4 Wheel Drive. Automatic. 54,000 miles. Check Engine Soon light is blinking. Code P0300 Random misfire. Light does not come on at all while driving around town. Only comes on when on the highway at over 60 mph. The light blinks for several minutes and then eventually goes out. Then several minutes later it comes back on blinking again. When the light comes on, the truck continues to run smoothly and there is no indication that something is wrong.
Monday, April 20th, 2009 AT 4:27 PM