How to service and repair the headlamp dimmer switch on Buick Regal?

Service and repair of the headlamp Dimmer Switch starts with setting the lever to the middle off position while disconnecting the negative Battery Cable. Disabling the sir system enables removal of the Steering Wheel followed by the steering column trim covers. Remove the wire harness straps belonging to the steering column then separate the multifunction and turn signal and hazard switch assembly connector from the sir coil assembly connector. Remove the screws securing the multifunction, turn signal and hazard switch assembly from the steering column tilt head assembly to extract the assembly from the bulkhead connector. Additionally, detach the multifunction and turn signal and hazard switch connectors out of the bulkhead connector and extract the assembly. You should apply a small flat-blade tool against the electrical contact to position the multifunction, turn signal, and hazard switch assembly onto the steering column where the electrical contact rests on the turn signal canceling cam. Order the installation by screwing the assembly to 7 nm (62 inch lbs.) then connect the bulkhead connector to its assembly and finalize the connection with the sir coil assembly. The wire harness assembly needs to be reinstalled to the steering column wire harness straps before checking the lever position is center or off. Then add the Steering Wheel and steering column trim covers. The sir system becomes operational after enabling it along with negative Battery Cable reconnection.

OEM Buick Dimmer Switch

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43 Dimmer Switches found

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Buick Turn Signal Switch Part Number: 12450067
$173.81 MSRP: $311.76
You Save: $137.95 (45%)
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Product Specifications
- Other Name: Switch, Headlamp Dimmer; Multi-Function Switch; Multi Purpose Switch
Fits the following Buick Models:
- Rainier | 2004-2007 | CXL, CXL Plus | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS
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Buick Turn Signal Switch Part Number: 88963625
$331.20 MSRP: $518.32
You Save: $187.12 (37%)
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Product Specifications
- Other Name: Switch Assembly, Turn Signal & Headlamp Dimmer, Wiper & Washer (W/Lever); Multi Purpose Switch
- Replaces: 26081121, 26067715, 26085929
Fits the following Buick Models:
- Century | 1997-2004 | Custom, Limited | 6 Cyl 3.1 L GAS
- Regal | 1997-2004 | 25th Anniversary Edition, GS, GSE, LS, LSE | 6 Cyl 3.8 L GAS
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Buick Dimmer Switch Part Number: 7838234
$45.38 MSRP: $67.54
You Save: $22.16 (33%)
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Product Specifications
- Other Name: Multi Purpose Switch; Headlamp Dimmer Switch; Switch, Headlamp Dimmer
Fits the following Buick Models:
- Commercial Chassis | 1991-1992 | Base | 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS
- Electra | 1989, 1984-1987 | Estate Wagon, Limited, Park Avenue | 6 Cyl 4.1 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L DIESEL
- LeSabre | 1984-1990 | Collector's Edition, Custom, Estate Wagon, Limited | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L DIESEL
- Riviera | 1984-1985 | Base, Luxury, T-Type | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L DIESEL
- Roadmaster | 1991-1992 | Base, Estate Wagon, Limited | 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS
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Buick Turn Signal Switch Part Number: 12450066
$131.50 MSRP: $246.94
You Save: $115.44 (47%)
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Product Specifications
- Other Name: Switch Assembly, Turn Signal & Headlamp Dimmer, Wiper & Washer (W/Lever); Multi Purpose Switch
Fits the following Buick Models:
- Rainier | 2004-2007 | CXL, CXL Plus | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS
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Buick Headlamp Switch, Black Part Number: 84867416
$6.73 MSRP: $10.54
You Save: $3.81 (37%)
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Product Specifications
- Other Name: Switch Assembly-Dimmer *Black; Switch, Headlamp Dimmer
Fits the following Buick Models:
- Enclave | 2022-2024 | Avenir, Essence, Premium | 6 Cyl 3.6 L GAS
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Buick Dimmer Switch Part Number: 26035239
$9.22 MSRP: $14.44
You Save: $5.22 (37%)
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Product Specifications
- Other Name: Switch, Dimmer; Multi Purpose Switch; Headlamp Dimmer Switch; Switch, Headlamp Dimmer
Fits the following Buick Models:
- Commercial Chassis | 1993-1996 | Base | 8 Cyl 5.7 L GAS
- Roadmaster | 1992-1996 | Base, Collector's Edition, Estate Wagon, Estate Wagon Collector's Edition, Limited, Limited Collector's Edition | 8 Cyl 5.7 L GAS
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Buick Switch Assembly-Dimmer Part Number: 26463938
$55.01 MSRP: $82.98
You Save: $27.97 (34%)
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Product Specifications
- Other Name: SWITCH ASM-DIMR
Fits the following Buick Models:
- Enclave | 2025 | Avenir, Preferred, Sport Touring | 4 Cyl 2.5 L GAS
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Buick Switch Assembly-Dimmer Part Number: 26463937
$55.01 MSRP: $82.98
You Save: $27.97 (34%)
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Product Specifications
- Other Name: SWITCH ASM-DIMR
Fits the following Buick Models:
- Enclave | 2025 | Avenir, Preferred, Sport Touring | 4 Cyl 2.5 L GAS
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Buick Switch, Headlamp Dimmer Part Number: 26376513
$70.15 MSRP: $104.40
You Save: $34.25 (33%)
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Product Specifications
- Other Name: Switch Assembly-Parking Brake *Backen Blackk
Fits the following Buick Models:
- Envision | 2024-2025 | Avenir, Preferred, Sport Touring | 4 Cyl 2.0 L GAS
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Buick Turn Signal Switch Part Number: 1999446
$50.81 MSRP: $60.05
You Save: $9.24 (16%)
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Product Specifications
- Other Name: Switch Assembly-Turn Signal & Headlamp Dimmer & Cruise Control; Multi Purpose Switch
Fits the following Buick Models:
- Century | 2005 | Custom, Limited, Special Edition | 6 Cyl 3.1 L GAS
- LaCrosse | 2005-2009 | CX, CXL, CXS, Super | 6 Cyl 3.6 L GAS, 6 Cyl 3.8 L GAS, 8 Cyl 5.3 L GAS
- Lucerne | 2006-2011 | CX, CXL, CXL Special Edition, CXS, Super | 6 Cyl 3.8 L GAS, 6 Cyl 3.9 L FLEX, 6 Cyl 3.9 L GAS, 8 Cyl 4.6 L GAS
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Buick Turn Signal Switch Part Number: 88964579
$201.53
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Product Specifications
- Other Name: Switch Assembly, Turn Signal & Headlamp Dimmer, Wiper & Washer (W/Lever); Multi Purpose Switch; Combination Switch
- Replaces: 26067714, 26081120, 26085928
Fits the following Buick Models:
- Century | 1997-2004 | Custom, Limited | 6 Cyl 3.1 L GAS
- Regal | 1997-2004 | 25th Anniversary Edition, GS, GSE, LS, LSE | 6 Cyl 3.8 L GAS
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Buick Dimmer Switch Part Number: 26019660
$50.34 MSRP: $74.92
You Save: $24.58 (33%)
Product Specifications
- Other Name: Switch, Headlamp Dimmer; Multi Purpose Switch; Headlamp Dimmer Switch; Switch
Fits the following Buick Models:
- Commercial Chassis | 1992 | Base | 8 Cyl 5.7 L GAS
- Roadmaster | 1992 | Base, Estate Wagon, Limited | 8 Cyl 5.7 L GAS
- Skylark | 1991, 1986-1989 | Base, Custom, Gran Sport, Limited, Luxury Edition | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L GAS, 6 Cyl 3.3 L GAS
- Somerset | 1986-1987 | Custom, Limited, T-Type | 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L GAS
- Somerset Regal | 1985 | Base, Limited | 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L GAS
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Buick Dimmer Switch Part Number: 26035567
Product Specifications
- Other Name: Switch, Dimmer; Multi Purpose Switch
- Replaces: 26000904
Fits the following Buick Models:
- Electra | 1985-1988 | Limited, Park Avenue, T-Type | 6 Cyl 3.0 L GAS, 6 Cyl 3.8 L GAS, 6 Cyl 4.3 L DIESEL
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Buick Dimmer Switch Part Number: 26035244
Product Specifications
- Other Name: Switch, Dimmer; Windshield Washer Switch; Multi Purpose Switch
- Replaces: 07841239, 7841239
Fits the following Buick Models:
- Century | 1984-1990 | Custom, Estate Wagon, Limited, T-Type | 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 3.0 L GAS, 6 Cyl 3.3 L GAS, 6 Cyl 3.8 L GAS, 6 Cyl 4.3 L DIESEL
- LeSabre | 1986-1988 | Base, Custom, Limited, T-Type | 6 Cyl 3.0 L GAS, 6 Cyl 3.8 L GAS
- Skylark | 1984-1985 | Custom, Limited, T-Type | 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS
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Buick Dimmer Switch Part Number: 26035242
Product Specifications
- Other Name: Switch, Dimmer; Multi Purpose Switch; Headlamp Dimmer Switch; Switch, Headlamp Dimmer
Fits the following Buick Models:
- Roadmaster | 1996 | Collector's Edition, Estate Wagon Collector's Edition, Limited Collector's Edition | 8 Cyl 5.7 L GAS
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Buick Dimmer Switch Part Number: 1995263
Product Specifications
- Other Name: Panel Dimmin; Multi Purpose Switch
Fits the following Buick Models:
- LeSabre | 1997-1998 | Custom, Limited | 6 Cyl 3.8 L GAS
- Riviera | 1995-1999 | Base | 6 Cyl 3.8 L GAS
- Skylark | 1990 | Base, Custom, Gran Sport, Luxury Edition | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS, 6 Cyl 3.3 L GAS
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Buick Turn Signal Switch Part Number: 25761901
Product Specifications
- Other Name: Switch, Headlamp/Fog Lamp/Turn Signal; Multi Purpose Switch
Fits the following Buick Models:
- Lucerne | 2006-2011 | CX, CXL, CXL Special Edition, CXS, Super | 6 Cyl 3.8 L GAS, 6 Cyl 3.9 L FLEX, 6 Cyl 3.9 L GAS, 8 Cyl 4.6 L GAS
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Buick Headlamp Switch Part Number: 1995996
Product Specifications
- Other Name: Switch Assembly-Headlamp Dimmer & Turn Signal; Windshield Washer Switch; Multi Purpose Switch
Fits the following Buick Models:
- Skylark | 1994-1995 | Custom, Gran Sport, Limited | 4 Cyl 2.3 L GAS, 6 Cyl 3.1 L GAS
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Buick Wiper Switch Part Number: 7844704
Product Specifications
- Other Name: Switch, Wiper Pulse, Dimmer Pivot; Windshield Washer Switch; Multi Purpose Switch
Fits the following Buick Models:
- Skylark | 1984-1985 | Custom, Limited, T-Type | 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS
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Buick Turn Signal Switch Part Number: 26057323
Product Specifications
- Other Name: Switch Assembly, Turn Signal & Headlamp Dimmer, Wiper & Washer (W/Lever); Multi Purpose Switch
Fits the following Buick Models:
- LeSabre | 2000-2002 | Custom, Limited | 6 Cyl 3.8 L GAS

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Buick Dimmer Switch

Choose OEM Dimmer Switch, you're making the optimal decision for superior quality and perfect performance. You can feel confident because each component goes through stringent quality checks. Every part is carefully built to comply with Buick's factory specifications. You'll enjoy a smooth, worry-free installation that fits just right. At ChevyPartsDeal.com, you'll find it easy to get top-quality OEM Buick Dimmer Switch. You can shop at highly competitive prices and protect your budget. All our genuine Buick parts include a dependable manufacturer's warranty. You'll also appreciate our straightforward return policy and swift delivery services for extra convenience.

Buick Dimmer Switch allows drivers to switch between bright and dim beams at a touch of a flicker in order to have a better view of the night. Buick dates back to 1903 and continues to trudge with comfort cabins and serene highway etiquette. The company combines vintage craftsmanship with silent tuning and thus, you can hear the chatter along the highway becoming quiet as the suspension goes through junk pavement. Such drivers that blend tradition and technology are considered to be true to themselves, not showoff. The badge will move to electric without abandoning comfort in concept models like the Wildcat EV. The long journeys remain easy due to the spacious seats, well-designed dashboard and controls that are in reach. Buick continues to upgrade cabins to fit the new lifestyle but remain pocket friendly. The Dimmer Switch is within the steering column giving current through heavy circuits causing low beams to hum until a quick click redirects the current to high filaments. Since the switch will switch the loads safely, the bulbs will last longer and there will be no need to drain batteries on dark trips to work. Weatherproofed contacts roll off grit, and the Dimmer Switch is able to respond to thousands of switches without that mushy feel and flicker. It has a smaller size, fits in without slicing wiring harnesses.

Buick Dimmer Switch Parts and Q&A

Turn Signal Switch
88963625
Q: How to service and repair the headlamp dimmer switch on Buick Regal?
A:
Service and repair of the headlamp Dimmer Switch starts with setting the lever to the middle off position while disconnecting the negative Battery Cable. Disabling the sir system enables removal of the Steering Wheel followed by the steering column trim covers. Remove the wire harness straps belonging to the steering column then separate the multifunction and turn signal and hazard switch assembly connector from the sir coil assembly connector. Remove the screws securing the multifunction, turn signal and hazard switch assembly from the steering column tilt head assembly to extract the assembly from the bulkhead connector. Additionally, detach the multifunction and turn signal and hazard switch connectors out of the bulkhead connector and extract the assembly. You should apply a small flat-blade tool against the electrical contact to position the multifunction, turn signal, and hazard switch assembly onto the steering column where the electrical contact rests on the turn signal canceling cam. Order the installation by screwing the assembly to 7 nm (62 inch lbs.) then connect the bulkhead connector to its assembly and finalize the connection with the sir coil assembly. The wire harness assembly needs to be reinstalled to the steering column wire harness straps before checking the lever position is center or off. Then add the Steering Wheel and steering column trim covers. The sir system becomes operational after enabling it along with negative Battery Cable reconnection.