Two problems related to check engine light on have been reported for the 2003 Chevrolet Silverado 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Chevrolet Silverado 2500 based on all problems reported for the 2003 Silverado 2500.
While driving, the check engine light comes on and "reduced engine power" is illuminated on the dash. Stepping on the gas does nothing. The vehicle just coasts along and runs rough. I have to pull over and shut it off for a few seconds. Sometimes it doesn't clear the problem right away and needs to be restarted several times. There is no rhyme or reason as to when this happens. It happens almost every day, on busy expressways or on main roads and side roads. The gas pedal loses communication with the throttle body. This is nerve wracking when driving 65 mph on the expressway and all of a sudden the vehicle wont respond to stepping on the gas pedal. Trying to get over several lanes to the side of the road is dangerous when there is no acceleration. It is also bad when on a busy, main road, the vehicle "acts up". I have to pull over, blocking traffic, until I can get it going again.
Vehicle remains running but shows power reduction. Check engine light comes on and stays on. You have to pull over, shut it off, press the arrow button on the steering wheel for a few second and restart. This happened on i35 at 70mph 4 times in 40 miles yesterday.