i had that same problem with my 97 cavilier. it was a real pain to remove. i ended up going back to auto zone after 2 hr’s of failed attempts to remove the line. you dont need a quick diconnect tool. it can be done with a small pry bar or a flat head screw driver. The guy at auto zone helped me. it looked like all he did was push the line in toward the filter and pryed back the black plastic piece away from the filter. becareful not to break the plactic piece on the line. as for the clear plastic piece on the new filter just remove it. i apologize for not being able to be more specific. but i did not remove it i just watched him do it. we ended up replacing the filter in the parking lot.