The 2021 Buick Enclave uses a mix of LED and halogen-style bulb listings depending on the lighting position, so this page helps you verify bulb sizes by location before you buy replacements. Whether you are changing an exterior signal light, an interior map light, or a cargo-area lamp, matching the bulb to the correct position is the easiest way to avoid fitment mistakes.
For the 2021 Buick Enclave, many forward and rear lighting functions are listed as LED, while a few serviceable bulbs still use common replaceable sizes such as 921, 168/917, 194/7441, and 7444NA. Because trim level, lighting package, market, and body style can affect the exact setup, it is smart to confirm the bulb position on your vehicle and compare it with the chart before ordering.
Fitment can vary on the 2021 Buick Enclave, especially between trims and lighting packages, so do not assume every bulb is the same across all versions. Some positions are factory LED assemblies, which may require replacing the complete unit rather than a simple bulb, while others use standard replaceable bulbs. If you are considering an aftermarket LED conversion for a halogen location, check polarity, connector style, and space inside the housing. It is also a good idea to remove the installed bulb and compare the number printed on the base before purchasing, since the same model year can use different bulbs in different markets or configurations.