Normally 0.044" - make sure it's not the type of plug you can't gap
According to my car mechanic this vehicle has coil overs, not plug wires.
The recommended spark plug gap for a 2000 Chevy Monte Carlo 3.4 V6 is .060"
it is 37
.o44 and some are .043.
0.060
0.060 Inch
.060"
Remove the plug from the bottom of your 2000 Chevy transmission. Allow the transmission to completely drained out. Return the transmission plug to its original position. Fill the transmission with new fluid.
0.040 40 thousandths.
40
.40 gap
1998-2000 2.4L is 0.050