Pontiac 6000 Headlight Bulb Size

Pontiac 6000 headlight bulbs utilize 9005 and 9006 sizes for high and low beam functions respectively, with alternative bulb designations H4651, H4652, and H4656 available for replacement applications. The replacement chart covers 1982 through 1991 model years with corresponding bulb size specifications.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

High Beam Headlight

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1990-1991	9005	HB3	Check Price
1982-1984	H4651	H4651	Check Price

Low Beam Headlight

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1990-1991	9006	HB4	Check Price
1984	H4652	H4652	Check Price
1983	H4656	H4656	Check Price
1982	H4652	H4652	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Single-filament halogen bulb with P20d base. 12V, 65W.	9005	Check Price
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H4651	Check Price
ANSI standard (US & Canada). Single-filament halogen bulb with P22d base. 12V, 55W.	9006	Check Price
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit, variant of H4651. Not a replaceable bulb — the entire unit is replaced. 12V.	H4652	Check Price
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H4656	Check Price

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Additional Notes

The Pontiac 6000 uses two distinct headlight technologies across its model years: sealed beam units in 1982-1984 and replaceable halogen bulbs in 1990-1991.
The H4651, H4652, and H4656 are all 4x6-inch rectangular sealed beam units operating at 12V. In sealed beam designs, the lens, reflector, and filament form a single fused assembly, meaning the entire unit is replaced rather than an internal bulb.
The 1983 low beam uses the H4656, while the 1982 and 1984 low beams use the H4652. Although both are 4x6-inch rectangular sealed beam units, they are distinct part numbers and are not confirmed as interchangeable.
The 9005 bulb, used for the high beam in 1990-1991, is a single-filament halogen type with a P20d base, rated at 12V and 65W. The P20d base is a push-in connector with a specific locking tab configuration.
The 9006 bulb, used for the low beam in 1990-1991, shares the same single-filament halogen construction but carries a P22d base and a lower 55W rating. The P22d base is physically different from the P20d, making the 9005 and 9006 non-interchangeable despite their similar appearance.
All bulb types listed across both sub-parts conform to ANSI standards applicable in the United States and Canada.
The wattage difference between the 9005 (65W) and 9006 (55W) reflects their respective roles: higher wattage for the high beam to produce a longer-range light pattern, and lower wattage for the low beam.
The 1990-1991 model years require two separate bulb part numbers for headlight service, one for high beam and one for low beam, as the system uses individual halogen bulbs rather than combined sealed beam units.