One problem related to underhood wiring has been reported for the 2004 Chevrolet Silverado 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Chevrolet Silverado 1500 based on all problems reported for the 2004 Silverado 1500.
February 20, 2010 I smelled a burning electrical smell. After a quick look under the dash on the passenger side I found smoldering wires from the wiring harness that is attached to the heater fan. The wires run from the heater fan motor to the resistor. The resistor is also damaged. The wires had to be replaced as well as the resistor. The parts dealer said that this part frequently must be replaced on this model truck and they keep at least 30 in stock just for this reason. This vehicle only has 63,575 miles on it. As a result, I was unable to use my heater or defroster which resulted in being very cold on my drive home from work at 6am and I could not defrost my windshield to see properly.