2002 GMC Sonoma driveline chatter and bad vibration

Started w/ chatter from underneath somewhere been doing it for quite a while. Just recently starting making alot of noise underneath.I sat in the back of truck while someone else drove looked in between the cab & bed and could see drive shaft move side to side. I replace center support bearing could still hear light chatter drove about 70 miles now back to same clunking back and forth loud noise. The shop that pressed bearing on said u joint looked fine(driveline is 2 peace & has 3 u joints). Thanx