Two problems related to alternator/generator/regulator have been reported for the 2003 Chevrolet Silverado 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Chevrolet Silverado 1500 based on all problems reported for the 2003 Silverado 1500.
1) brake line rusted and had to be replaced. 2) a new battery was installed only to be totally dead within 1 week 3) alternator replaced as that was thought to be the problem 4) finally found the problem and it is the abs system as the modulator / pump for this system would continually run even when the vehicle was turned off.
I have a 2003 silverado that has been having rough idling issues. The truck doesn't idle rough everyday,but when it does the voltage fluxuates between 10-14 volts. Before this started happening it stayed at a steady 14 volts. Now the voltage is dropping and the rpm's are dropping to around 200-300 rpms then some times it will die in motion. I have replaced the alternator and had the battery tested they are good. There was low fuel pressure so I replaced the pump,still nothing is helping. . Read more...