The typical bulb size for the front headlight side marker on a 2004 Chevy Silverado 1500 is a 194 wedge bulb (also listed as W2.1x9.5d). This is the common size used for the amber marker on the front fender, though there can be variations by trim or production run, so it should be verified on your exact vehicle.
Bulb size and base for the 2004 Silverado 1500 front side marker
The 194 wedge bulb is the most common choice for the front side marker lamp on this truck. It is a single-filament wedge-based bulb, designed to provide the amber color required by the marker lens. Some replacement catalogs label it as W2.1x9.5d.
How to confirm the correct bulb on your vehicle
To ensure you order the right bulb, verify by inspecting the bulb in place and using official catalogs or VIN-based parts lookups. Here are steps to confirm:
- Open the hood and locate the front fender headlight-side marker; remove the marker lens to access the bulb.
- Carefully remove the bulb and read the base stamping or compare the base to known wedge types (194/W2.1x9.5d).
- Cross-check the part number in a GM parts catalog or retailer database using your VIN, as some variations may occur by production batch or trim.
- If in doubt, take the old bulb to a parts store to match the base and brightness.
After verifying, install a new 194 wedge bulb and test the indicator to confirm amber color and proper operation.
Notes on variations and replacements
While the 194 wedge bulb is typical, some aftermarket replacements or dealer service notes might reference alternative sizes. If your vehicle has replaced lenses or non-stock wiring, the marker could use a different bulb. Always rely on the actual bulb you remove or the official parts listing for your exact VIN.
Summary
In most 2004 Chevy Silverado 1500s, the front headlight side marker uses a 194 wedge bulb (W2.1x9.5d). Verify by inspecting the bulb or checking the GM parts catalog. If you are replacing aftermarket or non-stock components, consult the manufacturer's specifications to ensure compatibility.