Chevrolet Cobalt high beam and low beam headlight bulbs both utilize a 9007 bulb size. The replacement chart covers vehicle production years spanning 2005 to 2010.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Chevrolet Cobalt uses the 9007 bulb for both high beam and low beam headlights across the 2005-2010 model years.
The 9007 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments to serve both the high beam and low beam functions within one housing.
Because both beam positions share the same 9007 bulb, the Cobalt's headlight system is a single-bulb-per-side design rather than a separate-bulb arrangement for each function.
The 9007 operates on a 12-volt electrical system and draws 65 watts on the high beam filament and 55 watts on the low beam filament.
The 9007 uses a PX29t base, which is a specific connector type. Bulbs with a different base type are not physically compatible with this socket, regardless of wattage or voltage rating.
The 9007 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning production of this bulb type follows a defined technical specification rather than varying by manufacturer.
The 9007 is sometimes confused with the 9004 bulb, which shares a similar dual-filament design but has a different wattage rating and a non-interchangeable base configuration.