The Chevrolet Avalanche side marker utilizes a 194 bulb size for illumination purposes across all listed vehicle configurations. Data provided for the specific lighting component covers the period from 2007 through 2013.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Chevrolet Avalanche uses the 194 bulb for both front and rear side marker positions across the 2007-2013 model years.
The 194 is classified as a miniature wedge bulb, designated T10 in the international bulb sizing system, where "T" refers to the tubular shape and "10" indicates the width in eighths of an inch.
The 194 bulb operates at 12 volts with a power draw of 3.78 watts, placing it among the lower-wattage bulbs used in automotive exterior lighting applications.
The wedge base design of the T10 format means the bulb is held in its socket by the tension of the base itself rather than by a separate metal contact pin, which is a common trait in low-current marker and courtesy light applications.
The 194 carries ANSI standardization recognized in both the United States and Canada, meaning the specification is consistent across North American vehicle applications.
Because the Chevrolet Avalanche (2007-2013) uses the same 194 bulb in all four side marker positions, front and rear replacements draw from a single bulb type, reducing the number of distinct part numbers required for a full side marker service.
The T10 wedge format is shared across a wide range of vehicle makes and models, though fitment into a specific socket depends on the socket housing design of the individual vehicle rather than the bulb specification alone.
At 3.78 watts, the 194 bulb produces a relatively low light output, consistent with its regulatory role as a position and conspicuity marker rather than a primary illumination source.