06 Monte front fender = 06 impala fender?
 

My son's 06 Monte Carlo got hit in the left front fender. There are very few of that gen in the junk yard near me, but at lot of the same vintage impalas. I know the hood is the same for both cars , what about the fender?

Negative. The Impala doesn't have the same fender sculpturing, and more importantly, the shapes of the doors aren't the same.