GMC Envoy XL License Plate Bulb Size

The GMC Envoy XL license plate light requires 12961 or 168 bulb sizes depending on the specific version of the vehicle. Data for the bulb sizes covers the range from 2002 through 2006.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2004-2006	12961
2002-2003	168

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168

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Additional Notes

The GMC Envoy XL uses two different license plate bulb sizes across its model years, with the 168 bulb fitted to 2002-2003 models and the 12961 bulb fitted to 2004-2006 models.
Both the 12961 and 168 are T10 miniature wedge bulbs, meaning they share the same physical envelope shape and general form factor.
Despite sharing the T10 form factor, the two bulbs differ in their base designations. The 12961 uses a W2.1x9.5d base, while the 168 follows the ANSI standard common across the United States and Canada.
The 12961 is a Philips part number rather than an ANSI or industry-wide designation, which means sourcing equivalent replacements may require cross-referencing against compatible ANSI or manufacturer part numbers.
Both bulbs operate at 12 volts, consistent with standard automotive electrical systems.
The wattage between the two types is nearly identical. The 12961 is rated at 5W and the 168 at 4.9W, a difference of 0.1W.
The 168 bulb is governed by ANSI standards, which defines its electrical and physical characteristics uniformly across compliant manufacturers, making sourcing straightforward from multiple suppliers.
Although both bulbs are T10 wedge types, the differing base specifications between the 12961 and the 168 mean they are not confirmed as interchangeable, and fitment should correspond to the designated model year.