Chevrolet Uplander Back Up Light Bulb Size

The Chevrolet Uplander back up light utilizes 3157 and 2458 bulb sizes for the lighting components. Data for the specified vehicle covers the range from 2005 through 2008.

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
2005-2008	3157

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3157

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Additional Notes

The Chevrolet Uplander uses the 3157 bulb for the back up light across the 2005-2008 model years.
The 3157 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard shared across the United States and Canada.
The 3157 is a dual-filament bulb, meaning it contains two separate filaments within a single housing, each operating at a different wattage.
The two filaments in the 3157 operate at 27W and 7W respectively, with the higher-wattage filament typically serving the primary function and the lower-wattage filament serving a secondary role.
The 3157 operates on a 12-volt electrical system, which is consistent with standard automotive voltage.
The bulb follows a T25 wedge form factor, a designation that refers to its physical housing shape and base type.
Because the 3157 is a dual-filament bulb, substituting it with a single-filament equivalent would result in the loss of one of its two electrical functions.
The ANSI standardization of the 3157 means the bulb is widely produced by multiple manufacturers to the same specification, making cross-brand substitution generally reliable provided the ANSI designation matches.