Contact via WhatsApp only. . The parts are removed from a 2011 Sierra, 5.3 engine, original first removal. Original cylinder heads, clean and intact. Complete short block, crankshaft, pistons, connecting rods, camshaft, lifters. Only one cylinder is damaged and needs machining. Rockers Pushrods Intake manifold Injectors and fuel rails Water pump Coils Valve covers Injectors and fuel rails Original exhaust manifolds (headers) Crankshaft pulley Oil pan ——— Located in Riyadh. Parts available for disabling the DOD system. . Contact via WhatsApp only.