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. Radiator Injectors and fuel rails Water pump Coils Injectors and fuel rails Original exhaust manifolds (headers) Crankshaft pulley Oil pan ——— Located in Riyadh. Also available parts for disabling the DOD system. Contact via WhatsApp only.