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Cadillac 7840274 Switch,Dimmer Pivot

1982-1989 Cadillac

Customer Questions & Expert Answers (3)
7840274 GM Switch,Dimmer Pivot Illustration 1 of 1
  • Part Description
    SWITCH, Headlamp Dimmer
  • Manufacturer
    General Motors
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine Cadillac
    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
    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
    1982-1985 Cadillac Eldorado6 Cyl 4.1L, 8 Cyl 4.1L, 8 Cyl 5.7L DieselBIARRITZ, COMMERCIAL CHASSIS, ELDORADO
    1982-1986 Cadillac Fleetwood6 Cyl 4.1L, 8 Cyl 4.1L, 8 Cyl 5.0L, 8 Cyl 5.7L Diesel, 8 Cyl 6.0L2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 2 DOOR RWD, BROUGHAM 4 DOOR, BROUGHAM 4 DOOR RWD, FORMAL LIMOUSINE, LIMOUSINE
    1982-1985 Cadillac Seville6 Cyl 4.1L, 8 Cyl 4.1L, 8 Cyl 5.7L DieselSEVILLE
  • Customer Questions & Expert Answers

    Q:
    Will this part number fit my car?
    A:
    You can Select Your Vehicle to check if 7840274 fits your vehicle.
    Posted and answered by GM Parts Specialist Syed
    Q:
    How do you disconnect the negative battery cable for the 1983 Buick Skylark when working on the Wiper Switch? Posted by Logan K.
    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. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Raul / Aug 26, 2022
    Q:
    How do you remove the Headlight Switch in the 1982 Oldsmobile Cutlass? Posted by Gisela G.
    A:
    Disconnect the negative battery cable and remove the cluster pad assembly. Then, remove the retaining screws and pull away the switch. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Bob / Feb 08, 2026

Genuine GM Part 7840274, the Right Choice

To ensure reliability, purchase GM part # 7840274 Switch,Dimmer Pivot. It is sometimes referred to as Cadillac Dimmer Switch, Cadillac Headlight Switch, Cadillac 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 Cadillac Brougham, Deville, Fleetwood models.

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