Pontiac Problems? Ask a Mechanic for Answers ASAP
Here are directions :
You have to pull on the line at the same time you have the 2 tabs squeezed in
You should be able to squeeze the outside edge of the plastic insert and pull the line out:
Press down on the plastic insert that is on the line itself while pulling filter and line apart.
The only other connection GM used requires a quick disconnect tool- but it is a metal connector: