Anyony know a good auto repair forum? I have been having an ongoing problem with my GMC 1500. 5.7L auto 2wd. It has a miss at hgh way speed. I'll be cruising along them it just misses, sometimes for a few seconds but usually just for a second. The check engine sign comes on if it is a long miss. The code says its the throttle position sensor. Changed it and it still misses. Changed the fuel pump, filter. I have changed the cap, rotor, plugs, and wires. I need to know what would cause a throttle position sensor code besides the sensor?