The Chevrolet HHR side marker utilizes a 194 bulb size for illumination purposes within the lighting assembly. Data for the specified component covers the range from 2006 through 2011.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 194 bulb is the sole bulb size listed across all side marker positions on the Chevrolet HHR, covering both front and rear applications for the 2006-2011 model years.
The 194 bulb follows the ANSI standard recognized in the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared across compliant manufacturers.
The 194 is classified as a miniature wedge bulb, designated T10 in the international bulb nomenclature system. The T10 designation refers to the tubular glass envelope width, expressed in eighths of an inch, placing it in the small-format category common to parking and marker lamp applications.
The wedge base design means the bulb is held in its socket by the tension of the base itself rather than by a bayonet or screw mechanism, which is a standard trait of T10 miniature bulbs used in low-current automotive positions.
The 194 operates at 12 volts, consistent with the standard electrical system voltage of conventional passenger vehicles.
At 3.78 watts, the 194 draws a low current load, which is typical for side marker lamps that serve a visibility and signaling function rather than primary illumination.
Because the same bulb size applies to both the front and rear side marker positions on the Chevrolet HHR, a single 194 bulb serves as a direct replacement for either location without substitution.