Phillips 1003B2 Dome Light Bulb - Rear

Phillips 1003B2 Dome Light Bulb Overview

The Phillips 1003B2 is a standard interior dome light bulb built for clear, direct cabin illumination. It uses a 12.8V rating, 12.03W output, a BA15s base, and a twist-type, 2-contact design for applications that call for this style of dome light bulb.

Phillips Standard - Twin Blister Pack is the brand’s value-focused line for everyday lighting needs. For drivers servicing older Chevrolet, GMC, Ford, Dodge, Pontiac, Buick, Cadillac, and Jeep interiors, this line provides a straightforward OE-style replacement option for dome light service.

• Part number 1003B2 for interior dome light replacement
• 12.8-volt clear bulb for cabin lighting
• BA15s base with twist-type, 2-contact configuration
• Single-filament design with 12.03W wattage
• Direct replacement style for many classic and late-model domestic vehicles
• Cross-reference: 73858

Detailed Product Description

Phillips 1003B2 is a clear dome light bulb intended for interior lighting circuits that use a BA15s base and twist-lock style retention. The bulb’s 12.8V specification and 12.03W draw make it a practical choice for restoring factory-style cabin light output in vehicles such as the Chevrolet C1500, Silverado 1500, GMC Jimmy, Ford Mustang, Dodge Charger, and Pontiac Grand Prix. If you are searching for a dome light bulb for a 1993-2001 Chevrolet Silverado 1500 or a 1987-1993 Chevrolet S10, this part number 1003B2 is a direct reference point for the application.

Vehicle Fitment Highlights

• Fits 1993-2001 Chevrolet C1500, N/A
• Fits 1999-2001 Chevrolet Silverado 1500, N/A
• Fits 1989-1997 GMC Jimmy, N/A
• Fits 1964-1969 Ford Mustang, N/A
• Fits 1970-1974 Dodge Challenger, N/A
• Fits 1971-1987 Pontiac Grand Prix, N/A
• Fits 1973-1991 Cadillac Fleetwood, N/A
• Fits 1987-1993 Chevrolet S10, N/A

Common Uses

• Restores dim, burned-out, or intermittent dome lighting
• Replaces a cracked or darkened interior bulb
• Addresses poor cabin visibility at night
• Supports interior light service on older GM, Ford, Dodge, and Chrysler vehicles
• Helps return factory-style illumination in dome light housings

Installation Notes and Tips

Verify the bulb base type, contact layout, voltage, and wattage before installation. This bulb uses a twist-type BA15s configuration, so it should be matched to the original dome light socket design. Confirm the vehicle’s interior lamp housing and bulb specification against the application listing for your Chevrolet C1500, GMC Sonoma, Ford Thunderbird, or similar fitment before replacement.

Quality Assurance

Phillips Standard lighting is positioned as a value-oriented replacement line for everyday automotive applications. The 1003B2 part number is built to meet the listed electrical and base specifications for interior dome light service.