GM Air Distributor & Windshield Defroster Push-Type Retainer (GM # 11589289) - Package of 20 GM Air Distributor & Windshield Defroster Push-Type Retainer Head Diameter: 18mm, Stem Length: 17.5mm Panel Range: 2.0mm - 4.5mm, Fits Into 6.5mm Hole GM # 11589289 Buick Enclave, Chevrolet Equinox, Chevrolet & GMC S & T Trucks, GMC Acadia and Pontiac Torrent 2008 - 02