Screw Size :M8-1.25Across Flats :13MMFlange Diameter :17MMOverall Height :8MMFinish :PhosphateOEM Number :(11514518 ; 11507036 ; 11502609 ; 11501889)GM :2019: Sierra 3500 HD, Sierra 2500 HD, Sierra 15002018: Sierra 3500 HD, Sierra 2500 HD, Sierra 15002017: Terrain, Sierra 3500 HD, Sierra 2500 HD, Sierra 1500, Acadia Limited2016: Terrain, Sierra 1500, Savana 3500, Savana 2500, Acadia2015: Terrain, Sierra 1500, Savana 3500, Savana 2500, Acadia2014: Terrain, Sierra 1500, Savana 3500, Savana 2500, Acadia2013: Terrain, Savana 3500, Savana 2500, Acadia2012: Terrain, Savana 3500, Savana 2500, Acadia2011: Savana 3500, Savana 2500, Acadia2010: Savana 3500, Savana 2500, Acadia2009: Acadia2008: Acadia2007: Acadia2005: Envoy XUV2004: Envoy XUV1999: K3500 Pickup, K2500 Pickup, K1500 Pickup, Jimmy, C3500 Pickup, C2500 Pickup, C1500 Pickup1998: K3500 Pickup, K2500 Pickup, K1500 Pickup, Jimmy, C3500 Pickup, C2500 Pickup, C1500 Pickup1997: K3500 Pickup, K2500 Pickup, K1500 Pickup, Jimmy, C3500 Pickup, C2500 Pickup, C1500 Pickup1996: K3500 Pickup, K2500 Pickup, K1500 Pickup, Jimmy, C3500 Pickup, C2500 Pickup, C1500 Pickup1995: K3500 Pickup, K2500 Pickup, K1500 Pickup, Jimmy, C3500 Pickup, C2500 Pickup, C1500 Pickup1994: K3500 Pickup, K2500 Pickup, K1500 Pickup, C3500 Pickup, C2500 Pickup, C1500 Pickup1993: K3500 Pickup, K2500 Pickup, K1500 Pickup, C3500 Pickup, C2500 Pickup, C1500 Pickup1992: K3500 Pickup, K2500 Pickup, K1500 Pickup, C3500 Pickup, C2500 Pickup, C1500 Pickup1991: K3500 Pickup, K2500 Pickup, K1500 Pickup, C3500 Pickup, C2500 Pickup, C1500 Pickup1990: K3500 Pickup, K2500 Pickup, K1500 Pickup, C3500 Pickup, C2500 Pickup, C1500 Pickup1989: K3500 Pickup, K2500 Pickup, K1500 Pickup, C3500 Pickup, C2500 Pickup, C1500 Pickup1988: K3500 Pickup, K2500 Pickup, K1500 Pickup, C3500 Pickup, C2500 Pickup, C1500 Pickup