Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2003 Chevrolet Silverado 2500 owners, lightly cleaned up (personal details are redacted by NHTSA).
Drove vehicle and noticed fan blower was not working, located fuse for blower, pulled and verified fuse is OK. Put fuse back in checked blower and fan was working. The next day my husband drove the vehicle for approx.10 min and smoke started billowing out from under the dash (pass. Side). He turned around, came home and we used a fire extinguisher to put out the fire under the glove box and also covered by a plastic covering not quickly able to be removed. Disconnected the batteries and removed the cover exposing the wiring. We can see the wiring and relay that have melted. Called GM (11/3, 9 - 10 bus. Days to respond), the vehicle is over warranty coverage, because I don't feel that a 5yr vehicle should just catch on fire. GM responded with a denial because of ma laws but I live in me so they are looking into it again with the cs rep that handles me. …
Tl contact owns a 2003 Chevrolet Silverado 2500 hd. While driving approximately 40 MPH the speedometer began to display a speed of 10 MPH. As a result the vehicle was involved in a crash. A police report was filed. A passenger in the other vehicle was injured. The vehicle was towed to an independent repair shop where the body damages were repaired but the failure was not diagnosed. The contact also stated that the fuel gauge and the speedometer intermittently displayed an improper reading. The failure mileage was 90,000 and the current mileage was 104,000. The VIN was unavailable.
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.
Tl* the contact owns a 2003 Chevrolet Silverado 2500. While driving 40 MPH, the reduced engine power light illuminated on the instrument panel. The vehicle stalled in the middle of the highway, but the contact was able to pull over to the side of the road. The vehicle was taken to an independent mechanic where it was diagnosed, but not repaired. The manufacturer was notified of the failure. The failure mileage was 195,000.
Instrument cluster panel of all gauges including speedometer and gear selection ' gauges can quit working with no warning , leaving the driver unaware of speed or distance traveled. Also not knowing what position the gear selector is in . ( park, neutral , drive etc. ) could allow the vehicle to drift away on it own with no one behind the wheel when not being driven . Can happen at any moment , any place !
At about 80,000 miles brake failure due to rusted through brake lines.a leaking fuel line was replaced due to rust. Grounding cable to the engine block needed to be replaced due to excessive corrosion. Exhaust system from engine block to tail pipe has been replaced, including both manifolds, due to rust. The front and rear bumpers are rusting through. None of these defects have resulted in any accidents.
The speedometer and tachometer were acting erratically, speedometer would read 110 MPH at normal highway speed, the tachometer would read 0- 1000 RPM at normal highway speeds, had to send cluster for repair. Main grounding strap was broken due to excessive corrosion and replaced after being towed to dealer. Air bag service light is on intermittently while driving, problem to be resolved.
Tl* the contact owns a 2003 Chevrolet Silverado 2500. The contact stated that the blower motor malfunctioned and would not operate using the first three settings. The blower would only operate in the number four and five settings due to an electrical shortage. The vehicle was not diagnosed nor repaired. The manufacturer was not notified of the failure. The failure mileage was 65,500.
When I turn the left turn signal on, it sometimes works and sometimes it doesn't. Sometimes it turns both turn signals on like the hazards. If I have my cruise set and use the left turn signal, it shuts the cruise off. Tr
The speedometer in my 2003 Chevrolet Silverado 2500hd suddenly stopped working. The normal speed shown now is over 120 MPH while moving or stopped. On rare occasions the speedometer will register a lesser speed for a short period of time but the normal speed shown is 120 MPH or higher. The odometer works without a problem as well as all other electrical functions of the speedometer other than actual speed. Per my most recent contact with a general motors dealer service department (mr. Goodwrench) that dealer is seeing an average of one similar vehicle per day with the same problem. Not knowing the actual traveling speed of the vehicle will certainly lead to traffic accidents and injuries if this has not already happened. I've now had two estimates to repair the speedometer. The first estimate was in 12/2004 and the estimate was $1,000.00+ and approximately 6 weeks in the shop. …
Electrical complaints in other Silverado 2500 years
Frequently asked questions
How common are electrical problems on the 2003 Chevrolet Silverado 2500?
NHTSA has 86 complaints about the electrical system of the 2003 Chevrolet Silverado 2500, 19% of the model year's 449 complaints. The component named most often is instrument cluster/panel (37 mentions).
Is there a recall for 2003 Chevrolet Silverado 2500 electrical problems?
No. NHTSA lists no electrical system recall for the 2003 Chevrolet Silverado 2500. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2003 Chevrolet Silverado 2500 electrical problems start?
Half of the complaints with a recorded mileage happened before about 72,000 miles, and 4% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 3 fires and 1 injury to electrical system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.