Windshield Washer Fluid Reservoir Cap for Buick Roadmaster 19540420

Multi-application brake light switch for GM vehicles. Compatible with Buick (Century, Enclave, LaCrosse, LeSabre, Lucerne, Park Avenue, Rainier, Regal, Rendezvous, Terraza), Cadillac (CTS, Deville, DTS, Eldorado, Escalade, Seville, SRX, STS), Chevrolet (Avalanche, Blazer, Camaro, Caprice, Cavalier, Colorado, Corvette, Equinox, Express, Impala, Malibu, Monte Carlo, S10, Silverado, Suburban, Tahoe, Trailblazer, Traverse), GMC (Acadia, Savana, Sierra, Yukon), Hummer H2/H3, Oldsmobile, Pontiac, and Saturn models from 1982-2017. OEM part number 19540420. New, reliable replacement.