The 2003-2006 Chevy Silverado 1500 is a testament to rugged flexibility and robust capability. Yet, one area often overlooked in maintaining this classic beast is its lighting system. Given that the factory-installed halogen bulbs can fade over time, it's essential to keep your Silverado's lights at their peak performance for safety and aesthetics.

This guide is designed to help you find the right bulb size and LED lighting upgrades for your 2003-2006 Chevy Silverado 1500. Once you learn the right bulb size, you can upgrade the LED bulbs for your Chevy Silverado 1500 for better brightness.

2003-2006 Chevy Silverado 1500 Bulb Size Reference

Here's a comprehensive bulb size chart for your 2003-2006 Chevy Silverado 1500.

Important Note: While this chart offers a general overview of bulb sizes, it is essential to prioritize accuracy by double-checking your vehicle's owner's manual or examining the existing bulbs before getting any replacements. This precaution will help ensure the correct bulb size is selected for your specific vehicle model.

LED Lighting Upgrades for 2003-2006 Chevy Silverado 1500

LED lighting is a fantastic upgrade for your Silverado 1500, offering brighter, cleaner light for better visibility and a modern look. Compatible bulb sizes for LED upgrades are the same as those listed in the chart above.

At SEALIGHT, we offer top-quality LED products for the lighting component of your Chevy Silverado 1500. Below we have picked some popular LED upgrades:

Headlight bulbs

The low beam headlight of 2003-2006 Chevy Silverado 1500 is 9006 and the high beam size is 9005. If you've found your factory halogen headlights underwhelming, casting dim, yellowish light that barely illuminates the road, an LED upgrade will transform your driving experience.

For the absolute brightest option available, consider the SEALIGHT S7S 9005/9006 LED Headlight Bulbs. This powerhouse combo delivers an impressive 66,000 lumens per set (16,500 lumens per bulb) at 260 watts, making them SEALIGHT's brightest LED headlight offering.

Find more LED headlight bulbs here >>

Fog light bulbs

Fog lights serve a specific purpose: they illuminate the road immediately in front of your vehicle during adverse weather conditions like fog, heavy rain, or snow. Your 2003-2006 Silverado 1500 uses 9145 bulbs (also compatible with 9140 and H10) for its front fog lights.

For a dramatic improvement in fog-cutting performance, we recommend the SEALIGHT XF3 H10/9145 LED Fog Light Bulbs. These are SEALIGHT's brightest fog light offering in the Xenower series, delivering 12,000 lumens at 60 watts per pair. That represents an 800% brightness increase over stock halogen fog lights.

Shop all Fog light bulbs here >>

Backup Lights and Brake Lights

The backup lights and brake lights of the 2003-2006 Chevy Silverado 1500 use the 3157 bulb.

For an effective upgrade, look no further than these SEALIGHT® 3157 LED Brake Light Bulbs.

Final Words

Above is the bulb size chart for the 2003, 2004, 2005, and 2006 Chevy Silverado 1500. We hope it is helpful if you're looking for a replacement bulb for your truck but don't know the correct bulb size.

Upgrading Chevy Silverado 1500's lighting system with SEALIGHT's range of LED products can significantly improve your driving experience. From brighter headlights to powerful fog lights and more visible brake lights, these LED upgrades provide a host of benefits that make them worth considering. Safe travels!