GMC Sierra LED Lights

GMC Sierra headlight bulbs are not available for all models and years. While some newer models offer factory-installed LED headlights, many earlier models come with halogen lamps. However, there are a number of aftermarket LED headlight options available for GMC Sierra models from 2007 through 2025. These upgrades typically feature plug-and-play installation, increased brightness, and modern styling.

Yes, you can absolutely upgrade your GMC Sierra's factory halogen headlights to LEDs. There are a variety of LED headlight conversion kits on the market designed specifically for different years and models of the Sierra, usually with a plug-and-play design that is easy to install and requires no modifications to the vehicle.

GMC Sierra headlight bulb replacement is a relatively simple thing to do, so you know, a lot of people can do it.

1. Open the hood and locate the headlight assembly.
2. Remove the dust cover (if present).
3. Unplug the wiring harness.
4. Twist and remove the old bulb.
5. Insert new bulb (do not touch glass).
6. Reconnect the wiring and replace the cover.
7. Test the headlights.

Don't forget to make sure your new bulb type matches the model year of the Sierra.

This is a relatively common question, and bulb sizes for the GMC Sierra depend on the model year and the specific lamps you are referring to (i.e., headlights, fog lights, brake lights, etc.). Below is a general guide to common bulb sizes by location, using the 2014-2018 GMC Sierra 1500 as an example.

2014–2018 GMC Sierra 1500 Headlight Bulb Sizes

Low Beam Headlight: H11

High Beam Headlight: 9005

Fog Light: H11

Front Turn Signal: 3157NA

Rear Turn Signal: 7440 / 7443

Brake Light: 7443

Reverse Light: 921

License Plate Light: 194

Cargo Light (bed light): 912 / 921

The average lifespan of a quality GMC Sierra-specific LED headlight is usually around 30,000 hours, which is more than 30 times that of a stock halogen bulb (about 1,000 hours). But the actual lifespan depends on the thermal design and brand quality. For example, RIMTHIN's LED bulbs have a better quality of life and can last up to 50,000 hours.

There are several possible reasons why your GMC Sierra headlights may be flickering:
1. Circuit problems: loose wires or poor contact, resulting in erratic current flow.
2. Bulb problems: poor or impending bulb contact.
3. Battery or generator failure: Unstable voltage may cause flickering.
4. LED light driver problem: If the headlight is an LED, the driver's power supply may be unstable or damaged.
It is recommended to check the circuit, bulb, and battery system and get it checked by a service professional if necessary.

LED bulbs perform well in rain and fog. In rain, their brighter output improves visibility on wet roads, while in fog, LED bulbs with a yellowish tint (3000K-4300K) cut through the fog more effectively than cool white LEDs. Proper beam patterns also reduce glare and enhance road illumination.

This one saddening thing, the common causes of GMC Sierra headlight failure may be the following:

1. burnt out bulbs: the most common cause is expired or damaged bulbs.
2. Blown fuse: A blown fuse in the circuit can prevent the headlights from working properly.
3. Wiring problems: Poor contact or damaged wires can cause an interruption in current flow.
4. Faulty relay: The relay that controls the headlight switch may be faulty, preventing it from turning on.
5. Insufficient battery power: Low battery power or unstable voltage may also affect the headlight working.

So we need to check these parts regularly to make sure they are functioning properly so that we can avoid such bad things from happening.