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GM 7840274 Switch,Dimmer Pivot

1982-1991 GM

Customer Questions & Expert Answers (15)
GM 7840274 Switch,Dimmer Pivot
  • Part Description
    SWITCH, Headlamp Dimmer
  • Manufacturer
    General Motors
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Product Specifications
  • Vehicle Fitment
  • Customer Questions & Expert Answers
  • Product Specifications

    BrandGenuine GM
    Manufacturer Part Number7840274
    Part DescriptionSWITCH, Headlamp Dimmer
    Other NamesHeadlamp Dimmer Switch, Wiper Switch
    Item Dimensions5.7 x 3.9 x 3.8 inches
    Item Weight0.70 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU7840274
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California’s Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    1982-1987 Buick Century4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 3.0L, 6 Cyl 3.8L, 6 Cyl 4.3L DieselCUSTOM 2 DOOR, CUSTOM 4 DOOR, CUSTOM STATION WAGON, LIMITED 2 DOOR, LIMITED 4 DOOR
    1982-1984 Buick Electra6 Cyl 4.1L, 8 Cyl 5.0L, 8 Cyl 5.7L Diesel2 DOOR, 4 DOOR, COUPE 2 DOOR, ELECTRA ESTATE WAGON, LIMITED 2 DOOR, LIMITED 2 DOOR RWD, LIMITED 4 DOOR, LIMITED 4 DOOR RWD, SEDAN 4 DOOR
    1982-1989 Buick Estate Wagon6 Cyl 3.8L, 6 Cyl 4.1L, 8 Cyl 5.0L, 8 Cyl 5.7L DieselCUSTOM 2 DOOR, CUSTOM 4 DOOR, ELECTRA ESTATE WAGON, ESTATE WAGON, LIMITED 2 DOOR, LIMITED 2 DOOR COLLECT SP EDIT, LIMITED 4 DOOR, LIMITED 4 DOOR COLLECT SP EDIT
    1988-1990, 1982-1985 Buick Lesabre6 Cyl 3.8L, 6 Cyl 4.1L, 8 Cyl 5.0L, 8 Cyl 5.7L DieselCUSTOM 2 DOOR, CUSTOM 4 DOOR, ELECTRA ESTATE WAGON, ESTATE WAGON, LIMITED 2 DOOR, LIMITED 2 DOOR COLLECT SP EDIT, LIMITED 4 DOOR, LIMITED 4 DOOR COLLECT SP EDIT
    1982-1987 Buick Regal6 Cyl 3.8L, 6 Cyl 4.1L, 6 Cyl 4.3L Diesel, 8 Cyl 5.0L, 8 Cyl 5.7L Diesel2 DOOR, 4 DOOR, REGAL, STATION WAGON
    1982-1985 Buick Riviera6 Cyl 3.8L, 6 Cyl 4.1L, 8 Cyl 5.0L, 8 Cyl 5.7L DieselCONVERTIBLE COUPE, RIVIERA, T TYPE
    1982-1985 Buick Skylark4 Cyl 2.5L, 6 Cyl 2.8L2 DOOR, 4 DOOR, CUSTOM 2 DOOR, CUSTOM 4 DOOR, LIMITED 2 DOOR, LIMITED 4 DOOR
    1987-1989 Cadillac Brougham8 Cyl 5.0LBROUGHAM 4 DOOR RWD
    1982-1985 Cadillac Commercial Chassis8 Cyl 4.1L, 8 Cyl 6.0LCOMMERCIAL CHASSIS
    1982-1984 Cadillac Deville6 Cyl 4.1L, 8 Cyl 4.1L, 8 Cyl 5.7L Diesel2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 4 DOOR, FORMAL LIMOUSINE, LIMOUSINE
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  • Customer Questions & Expert Answers

    Q:
    Will this part number fit my car? Posted by GMPartsGiant Specialist
    A:
    You can Select Your Vehicle to check if 7840274 fits your vehicle.
    Posted by GMPartsGiant Specialist
    Q:
    How do you disconnect the negative battery cable and remove the switch on Buick Skylark,Oldsmobile Omega and Pontiac Phoenix? Posted by Customer
    A:
    To disconnect the negative battery cable, remove the instrument panel bezel, disconnect the wiring at the steering column, and remove the wiper switch. To reinstall, follow the reverse order of the removal procedure.
    Posted by GMPartsGiant Specialist
    Q:
    How do you install the headlight switch for the 1985 Buick Century? Posted by Customer
    A:
    Push the switch straight in being careful not to damage prongs on the new switch, tighten screws, connect the battery cable, and check operation.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Headlight Switch
    Q:
    How do you remove the wiper switch on 1975-77 models of the 2015 Buick Regal? Posted by Customer
    A:
    Insert one or two narrow bladed screw drivers into each of the two slots within the switch face immediately above the knobs and bend the retaining clips downward or break them off, then rotate the top of the switch outward to remove.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Wiper Switch
    Q:
    How do you reinstall the switch for the 1982 Buick Skylark? Posted by Customer
    A:
    To reinstall the switch, you need to follow the reverse of the removal procedure.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Headlight Switch
    Q:
    How do you remove the headlight switch on 1975-79 models of the 1976 Buick Regal? Posted by Customer
    A:
    Remove the screws securing the headlight switch in place. Disconnect the multiple electrical harness from the switch, and remove.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Headlight Switch
    Q:
    How do you remove the wiper switch on the 1982 Buick Century? Posted by Customer
    A:
    Insert one or two narrow-bladed screwdrivers into each of the two slots within the switch face immediately above the knobs and bend the retaining clips downward or break them off, then rotate the top of the switch outward to remove.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Wiper Switch
    Q:
    How do you remove the steering column trim cover for the 1983 Buick Skylark? Posted by Customer
    A:
    Remove it from the underside of the dash.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Dimmer Switch
    Q:
    How do you disconnect the negative battery cable for the 1983 Buick Skylark? Posted by Customer
    A:
    To disconnect the negative battery cable, you need to remove the instrument panel bezel, disconnect the wiring at the steering column, and remove the switch.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Wiper Switch
    Q:
    What should you do to reinstall the negative battery cable of the 1984 Oldsmobile Omega? Posted by Customer
    A:
    To reinstall the negative battery cable, you should follow the reverse order of the removal procedure.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Wiper Switch
    Q:
    What should you do after pushing the switch out of its mounting hole and lifting it up and out through the opening for the 1980 Pontiac Phoenix? Posted by Customer
    A:
    After pushing the switch out of its mounting hole and lifting it up and out through the opening, you should disconnect the switch from its wiring connector.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Headlight Switch
    Q:
    How do you remove the lighting switch in the 1989 Oldsmobile Cutlass? Posted by Customer
    A:
    Start by disconnecting the negative cable at the battery.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Headlight Switch
    Q:
    How do you complete the installation for the 1982 Pontiac Phoenix? Posted by Customer
    A:
    Reverse the removal procedure described in paragraphs 1 through 6.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Dimmer Switch
    Q:
    How do you reinstall the switch of the 1982 Oldsmobile Omega? Posted by Customer
    A:
    To reinstall the switch, you need to follow the reverse of the removal procedure.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Headlight Switch
    Q:
    How do you remove the steering column trim cover of the 1984 Oldsmobile Omega? Posted by Customer
    A:
    Remove it from the underside of the dash.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Dimmer Switch
    If you have any questions about this product, please don't hesitate to ask us. We will be happy to help you!

Genuine GM Part 7840274, the Right Choice

To ensure reliability, purchase GM part # 7840274 Switch,Dimmer Pivot. It is sometimes referred to as GM Dimmer Switch, GM Headlight Switch, GM Wiper Switch. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific Buick Century, Lesabre, Regal models. It fits Cadillac Brougham, Deville, Fleetwood. It also fits Chevrolet Blazer, Impala, Malibu. This also fits GMC C2500, K1500, Suburban.

GMPartsGiant.com is a leading supplier of genuine GM parts and accessories such as GM 7840274 Switch,Dimmer Pivot. You're certainly in the right place if you're searching for the great cost-effective OEM GM parts. Look no further than our vast inventory of genuine GM parts offered at unbeatable online prices, all of which are backed by the manufacturer's warranty. Not to forget, our hassle-free return policy and quick delivery service ensure a smooth shopping experience for you. For detailed GMC parts information, click here.

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