Crankshaft Gear Crankshaft timing gear or toothed pulley for the timing drive CLOYES "S505" - Not availableCHEVROLET - Blazer S10, S10, Astro, C30, C3500, P30, C10, C20, C1500 Suburban, C2500, Express; GMC - Safari, Savana 2500, Jimmy