Shopping for OEM parts and accessories for your GM has never been easier or cheaper. With a network of dealerships fulfilling orders, we ensure that your Headlamp Dimmer Switch (7840274) will be delivered right to your door in a matter of days. All of our parts are genuine OEM parts so we guarantee your Headlamp Dimmer Switch will perfectly fit your 1984-1990 vehicle, and you'll get your parts for less than you would pay at your local parts counter. 

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