Chevrolet Silverado Daytime Running Light Bulb Size

Additional Notes

• The H11 is a single-filament halogen bulb operating at 12V and 55W, built to the ECE standard used in Europe and worldwide, though it also carries approval for use in the United States. Its base type is PGJ19-2, a designation that refers to the physical connector and pin configuration that must match the vehicle's socket.
• The 4114 follows the ANSI standard, which governs bulb specifications in the United States and Canada. Unlike the H11, it carries two filaments within a single housing, a construction associated with bulbs that serve more than one lighting function or intensity level. It operates at 12V.
• The Chevrolet Silverado used the 4114 bulb for daytime running lights across the 1999-2006 model years, representing the earlier generation of this fitment.
• Starting with the 2007 model year, the Silverado transitioned to the H11 bulb for daytime running lights, a fitment that continued through 2013 without variation across trims.
• For the 2014 Chevrolet Silverado, the H11 specification applies exclusively to the 2500 HD and 3500 HD variants. This trim-specific restriction means the H11 fitment does not apply universally across the full 2014 Silverado lineup.
• Because the H11 and 4114 use different base types and filament configurations, they are not interchangeable with each other. Installing the wrong bulb type risks an improper fit or incompatibility with the socket and wiring.
• The PGJ19-2 base of the H11 is a keyed connector, meaning orientation and pin placement are fixed. A bulb with a different base designation will not seat correctly in an H11 socket even if the outer housing appears similar in size.
• The dual-filament construction of the 4114 distinguishes it as a specialty application bulb under ANSI classifications, a category that typically indicates the bulb was engineered for a specific use case rather than general-purpose lighting.