Chevrolet Brookwood HVAC Temperature Control Bulb Bulb Size

The Chevrolet Brookwood HVAC temperature control bulb requires a unique bulb size of 53 for proper installation within the specified interior lighting system. Data for the bulb size covers the range of 1958 to 1961.

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 Type	Shop
1958-1961	53	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 2W.	53	Check Price

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Additional Notes

The ANSI 53 bulb is the sole bulb type specified for the HVAC temperature control illumination of the Chevrolet Brookwood across the 1958-1961 model years.
The 53 bulb operates on a 12-volt electrical system and draws 2 watts, placing it in the low-wattage category suited for instrument and control panel lighting applications.
This bulb uses a BA9s base, a miniature bayonet fitting with a 9mm cap width, which is a common base type in small indicator and panel lighting roles.
The 53 bulb is a single-filament type, meaning it produces one fixed level of illumination with no high or low beam function.
The ANSI 53 designation confirms the bulb meets a standardized specification recognized in both the United States and Canada, establishing consistent physical and electrical parameters across manufacturers.