Pontiac 6000 Dome Light Bulb Size

The Pontiac 6000 dome light requires a 561 bulb size for proper illumination within the interior cabin area of the vehicle. Data for the bulb covers the 1982 to 1991 range of production for the specified automobile.

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
1990-1991	561
1982-1984	561

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	561

Other Locations

Additional Notes

The Pontiac 6000 uses the 561 bulb for the dome light across all listed model years, spanning 1982-1984 and 1990-1991.
The 561 is a festoon-type bulb, meaning it is cylindrical in shape and makes electrical contact through metal caps at each end rather than through a base socket.
The 561 bulb has a length of 44mm, which is the critical fitment factor for festoon bulbs, as the housing must hold the bulb under slight compression between its two contact points.
The 561 operates at 12 volts and 12 watts, which is consistent with standard automotive electrical systems.
The 561 carries ANSI standardization recognized in both the United States and Canada, meaning the specification is consistent across North American markets.
Festoon bulbs are not interchangeable with wedge-base or bayonet-base bulbs, as those types rely on fundamentally different contact and retention mechanisms.
When replacing a festoon bulb, the length of the replacement must match the original, as a shorter bulb will not maintain contact and a longer one will not seat properly within the housing.