how many repair hours for lifter replacement? on 2001 Chevrolet Monte Carlo

we have been told we need a lifter replaced on our 2001 chevy monte carlo with a 3.4 v6 motor. about how many hours does the manufacturer suggest this repair should take?
thank you & happy new year!

Asked by for the 2001 Chevrolet Monte Carlo
According to Alldata it takes 5.7 hours for 1 lifter and 6.3 for all lifters.I recommend you change all of them.