Two problems related to horn assembly 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 returning home from a 2 week vacation (30 miles from home) slowed down to make a right turn on a city street in woodland, CA, the truck just shut down, no steering, no brakes, no engine, total electrical shutdown. It was everything I could do to make the turn and pull to the right. At the time I was pulling my 2009 bighorn fifth wheel trailer. It was a scary time. I finally stopped, lucky there was no cars parked on the right near the curb. I put the transmission in neutral and restarted the engine. Then we continued the trip home to winters, CA. I took the truck to imler diesel in sacramento to check the engine out. They replaced the injectors which we had agreed to do prior to making the two week trip. The next trip was to bodega bay on January 14, 2014. We traveled about 100 miles. Again we were pulling our fifth wheel trailer. Slowing down from 55 mph to 15 mph, preparing to make a left turn in doran beach park at bodega bay, the truck shut down again. I came so close to hitting a tree. Oncoming traffic stopped just in time as the speed limit at 55 mph seemed to see what was happening giving me time to restart and move off the highway. My wife and I were both shaken up a bit, but also feeling very lucky not having a crash. We continued home 4 days later. We parked the truck. The milage was 143579 at the start of the trip and 143819 at end. I have not used the truck since. I do not feel it is safe to drive. I was lucky twice, don't know if I want to risk a third try. Looking back, the shutdown did happen two other times but I was not pulling the fifth wheel trailer, I can't remember the dates. Chevrolet lt 2500 hd 4x4 diesel 2003 truck.
I've had it less than 1 year, and has under 90,000 miles. I left my house and got 1/4 mile down the street and the entire cab of the truck filled with smoke. Had to call 911 and have the fire department come to the scene. An electrical fire above the head liner killed the electronics in the entire vehicle. No lights, power seats, radio, dash cluster, external lights and signals, horn, windows,nothing works, engine wont start. The fire appears to have started next to the on star speaker in the headliner.