1995 Other Chevrolet Models timing

Engine Performance problem
1995 Other Chevrolet Models V8 Four Wheel Drive Automatic

yea on a 95 chevy 2500 4x4 how can u tell if ur timing chain jumped tha truck well idle for about 20 second it sputters real bad if u put it to the floor it cuts outs and dies if u try to put it in drive it dies ive change distrubtor wires rotor spark plugs coil fuel filter