GMC Sierra 2500HD 2021 Bulb Size

Bulb size chart

Fog Light Bulb Front - 5202 LED
Headlight Bulb High Beam and Low Beam - D5S
Back Up Light Bulb - 921
Brake Light Bulb - 7443
Center High Mount Stop Light Bulb - 921
License Plate Light Bulb - 2825
Parking Light Bulb - 7443
Side Marker Light Bulb Rear - 194
Tail Light Bulb - 7443
Turn Signal Light Bulb Front - 7443
Turn Signal Light Bulb Rear - 7443
Trunk or Cargo Area Light - 921

5202 LED Bulbs

Used for: Fog Light Bulb Front

BEAMTECH 5202 Led Fog Light Bulb,H16(European Type,Not Japan vehicles)

BEAMTECH 5202 Led Fog Light Bulb,H16(European Type,Not Ja...

The BEAMTECH 5202 Led Fog Light Bulbs come in a set of 2 bulbs, each equipped with 6 SEOUL Z8Y19 high power CSP chips. These bulbs have a lower power consumption compared to halogen bulbs, resulting in energy savings while providing a greater light output. Each bulb has a power of 30w, emitting a Xenon White color at 6500K. With a lumen rating of 800 lms and a voltage range of 12V to 24V, these bulbs have a lifespan of over 10,000 working hours. They offer a 320-degree lighting angle, delivering an impressive emitted light effect. The bulbs feature a Cold Pressed Aluminum Heat Sink that provides 35% higher heat reduction. Their advanced design prioritizes heat protection and ensures consistent brightness output. The efficient spacing and aviation aluminum heatsink guarantee maximum LED bulb longevity. These bulbs are designed to be compatible with various fitment sizes and feature a non-polarity design, allowing for easy installation through a simple Plug & Play process. Their meticulously engineered beam angularity matches that of halogen bulbs while delivering superior lighting results.

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View all 7 replacement options for size 5202 LED →

D5S Bulbs

Used for: Headlight Bulb High Beam and Low Beam

Philips D5S Standard Authentic Xenon

Philips D5S Standard Authentic Xenon

POWERFUL LIGHT FROM XENON HID BULBS OFFER MAXIMUM SAFETY: Xenon HID (High Intensity Discharge) headlight bulbs offer twice as much light* for safer driving in all conditions while consuming 50% less power. The intense white light produced by the Xenon HID lamps is comparable to daylight. Studies have demonstrated that xenon automotive lighting helps drivers to concentrate on the road and to distinguish obstacles and road signs much faster than traditional lamps. *Compared to standard halogen bulbs

$99.00

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View all 10 replacement options for size D5S →

921 Bulbs

Used for: Back Up Light Bulb, Center High Mount Stop Light Bulb, Trunk or Cargo Area Light

View all 14 replacement options for size 921 →

7443 Bulbs

Used for: Brake Light Bulb, Parking Light Bulb, Tail Light Bulb, Turn Signal Light Bulb Front, Turn Signal Light Bulb Rear

AUXITO 7443 LED Bulbs - Red

AUXITO 7443 LED Bulbs - Red

Upgrade your vehicle's brake lights with confidence, as the AUXITO 7443 LED Bulbs offer ultra-brightness and a safer lighting solution. These bulbs utilize advanced LED technology to deliver an intensified illumination that surpasses traditional incandescent bulbs. Enjoy a noticeable upgrade in brightness, making your brake lights highly visible and ensuring a safer driving experience for you and those around you. Say goodbye to complicated installations, as the AUXITO 7443 LED Bulbs are designed for a direct fit. Simply replace your existing bulbs with these LED counterparts, saving you time and effort. Additionally, these bulbs have versatile applications, making them suitable for various lighting functions beyond brake lights. Illuminate your turn signals, tail lights, or other compatible applications with the same confidence and superior brightness. Reliability is key, and the AUXITO 7443 LED Bulbs offer stable use and a longer lifespan. Built with quality and durability in mind, these bulbs provide a consistent lighting performance that you can rely on. Enjoy peace of mind knowing that these bulbs will last longer, saving you from frequent replacements and ensuring a stable and reliable lighting solution for your vehicle.

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View all 20 replacement options for size 7443 →

2825 Bulbs

Used for: License Plate Light Bulb

View all 12 replacement options for size 2825 →

194 Bulbs

Used for: Side Marker Light Bulb Rear

View all 21 replacement options for size 194 →

This page helps you verify the bulb sizes for the 2021 GMC Sierra 2500HD by lighting position, so you can match the correct replacement before you buy. Whether you are changing a headlight, tail light, license plate lamp, or a small interior or cargo bulb, checking the exact socket location is the easiest way to avoid ordering the wrong part.

For the 2021 GMC Sierra 2500HD, the listed bulb types include D5S for the headlight high beam and low beam, 7443 bulbs in several exterior positions, 921 bulbs for the center high mount stop light, cargo area light, and back up light, plus 194 and 2825 bulbs for specific rear and plate lighting locations. This makes it easier to compare the bulb chart with the light that needs service on your truck.

Fitment can vary by trim, body style, market, and lighting package on the 2021 GMC Sierra 2500HD, so it is smart to confirm the installed bulb before placing an order. Some trucks use halogen-style setups in certain positions, while others may have LED or upgraded factory lighting that changes the replacement method. If you are considering aftermarket conversions or LED replacements, make sure the bulb base, connector, polarity, and housing space are compatible. When possible, remove the old bulb and compare it directly to the replacement to confirm the exact match.

FAQ

What headlight bulb does the 2021 GMC Sierra 2500HD use?

The listed headlight bulb for both high beam and low beam on the 2021 GMC Sierra 2500HD is D5S.

What bulb size is used for the front fog lights?

The front fog light bulb listed for this truck is 5202 LED.

Which bulb fits the rear brake light on the 2021 Sierra 2500HD?

The brake light bulb listed is 7443.

What bulb does the front turn signal use?

The front turn signal light bulb listed for the 2021 GMC Sierra 2500HD is 7443.

What bulb size is used for the rear turn signal?

The rear turn signal light bulb listed is 7443.

What is the tail light bulb size?

The tail light bulb listed for this model is 7443.

What bulb fits the parking light?

The parking light bulb listed is 7443.

What bulb is used for the rear side marker light?

The rear side marker light bulb listed is 194.

What bulb fits the license plate lights?

The license plate light bulb listed is 2825.

What bulb size is used for the center high mount stop light?

The center high mount stop light bulb listed is 921.

What bulb fits the back up light?

The back up light bulb listed is 921.

Does the 2021 GMC Sierra 2500HD use the same bulb in multiple locations?

Yes. The 7443 bulb appears in several exterior positions, and the 921 bulb is listed for more than one function, so it is important to match the bulb to the exact lighting position.

Why should I check the installed bulb before buying a replacement?

Because trim level, lighting package, body style, and market can change the exact fitment. Checking the installed bulb helps confirm the correct base and type before purchase.

Can I switch to LED bulbs on this truck?

In some positions, yes, but fitment depends on the housing and electrical setup. If you choose LED replacements, verify compatibility, beam pattern, and whether any additional parts are needed.

GMC Sierra 2500HD Bulb Size by Year