2003 Chevrolet Silverado 1500 HD electrical system problems
30 owner complaints filed with NHTSA name the electrical system on the 2003 Chevrolet Silverado 1500 HD — 30% of all complaints for this model year.
What owners report
“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…”
filed Aug 7, 2020
“The instrument panel cluster will stop working. No gauges, speedometer, or tachometer. Usually occurs after vehicle has been driven, turned off and restarted. Know of several people having/had the same issue with this year model. Sometimes the cluster will become active again while driving, but…”
filed Jul 16, 2020
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
This service bulletin provides information for dealers/technicians on OnStar Module 2G Sunset Information.
23-NA-001 · Service Bulletin/Repair Instructions · issued Mar 28, 2025Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to…
General Communication · Service Campaign · issued Aug 26, 2024
Electrical System problems in other Silverado 1500 HD years
| Year | Reports | Share |
|---|---|---|
| 2005 Silverado 1500 HD | 8 | 31% |
| 2002 Silverado 1500 HD | 1 | 5% |
Other reported problem areas on the 2003 Chevrolet Silverado 1500 HD
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.