1998 Pontiac Bonneville Plastic elbow above water pump is c

No need to remove the intake manifold
line come from the back and go through the pulley housing and out to the intake
remove belt ,removing the pulley and housing and that should allow you to remove and replace the defective lines
I would replace them all
Make sure you have the parts on hand
if you like post a picture just to be sure we are talking about the same plastic elbow

Thanks, we are talking about the same thing. I just didn't realize there would be other lines to replace also. Good to know before I tear into it.