sold out quick view Call for Availability Priority Valve (GMF1073) MSRP: $875.00 This is the Height Control Leveling Valve, also know as the Priority Valve. 1981-1998 Silver Spirit, Silver Spur, Mulsanne, Turbo R Pre Arnage Models 1980-1989 (VIN 1001-28000) CORE CHARGE $150 When returning core, please insure with... Call for Availability