2022 Chevrolet Silverado 3500HD Bulb Sizes

Quick Reference

The 2022 Chevrolet Silverado 3500HD primarily utilizes LED lighting from the factory for its exterior lighting, particularly in higher trim levels. On base models (WT, Custom), you may find some halogen bulbs, but even there, many functions are integrated LED units. The advanced lighting systems often mean that individual bulb replacement for headlights, fog lights, and some other exterior functions is not always straightforward, as entire assemblies may need to be replaced. Always verify your specific setup before purchasing replacement bulbs.

OEM Differences: Halogen vs. LED

• Headlights (Low and High Beam): The vast majority, especially LT, RST, LTZ, and High Country trims, come standard with full LED projector headlights. These systems offer superior illumination and longevity. Some base WT models might have halogen projector-style headlights or a mix, but these are less common for the 3500HD. For vehicles with factory LED headlights, the 'bulb' is typically an integrated LED chip within the housing, not a replaceable bulb.
• Fog Lights: Similar to headlights, most 2022 Silverado 3500HD models come with factory LED fog lights, which are part of an integrated assembly.
• Daytime Running Lights (DRL): All 2022 Silverado 3500HD models feature signature LED DRLs built into the headlight assemblies.
• Turn Signals (Front & Rear): Depending on the trim, these can be either incandescent (e.g., 7443K for front, 7440A for rear) or integrated LED units. High Country and LTZ will almost certainly have LED turn signals.
• Brake/Tail Lights: Integrated LED tail light assemblies are standard on most trims, especially higher ones. Lower trims might use conventional incandescent bulbs for brake (7443) and tail functions, but often these are still combined with LED elements.
• Reverse Lights: Typically, these are replaceable incandescent bulbs (921), though some higher trims may feature LED reverse lighting within complex tail light assemblies.
• License Plate, Side Marker, Dome, Map Lights: These are the most common areas to find replaceable incandescent bulbs (like W5W/168 for license plate/side markers, 578 for dome, 194 for map). However, many trims offer LED upgrades for these interior and utility lights directly from the factory or as part of convenience packages.

LED vs. Halogen Upgrade Considerations

If your 2022 Silverado 3500HD came with halogen bulbs in any location, upgrading to LED can provide significant improvements in brightness, color temperature (whiter light), and longevity. However, there are crucial considerations:

• CANBUS Errors (Bulb-Out Warnings): Modern vehicles like the Silverado 3500HD use a CANBUS system to monitor electrical resistance. LED bulbs draw significantly less power than halogen bulbs. When an LED is installed in place of a halogen, the lower resistance can trigger a