Do I "NEED" the special 32mm to remove the oil filter?
 

We can't seem to get it off with a pipe wrench.

It just seems to keep slipping off.

I'd highly recommend getting the proper socket, you don't want to mess up the oil filter cap, it would really ruin your day. Head to your local auto parts store, the sockets are not that expensive, and it'll pay for itself the first time you use it.

"right tool for the right job"
i got mine!

I'm going another route than previous responders.....

Since you are emphasizing "NEED", I will say MAYBE NOT. If you are VERY careful a crescent wrench or water pump pliers will work. It really depends on how tight the previous person tightened it.

When reinstalling, it only takes something like 25 Ft# to install (according to GM spec.). Someone will correct me if this is wrong. That's a little more than hand tighten. But most people are gorilla's and crank it down.

The real "problem" is starting the thread correctly when reinstalling.....then just a quick snap of the wrist with the wrench will do it.

My first oil change was using this method. I have since purchased a socket of the correct size.

Having the correct tool is handy, however.

Ok i did like you said and i got the part for $9

But the cap wont come off.

I looked up a video and it was a counter clockwise removal, but its not budging!

So now im thinking we could have used the pipe wrench.

Am i doing something wrong?

Are some reverse thread?

Im pretty sure the last person really tigtened the hell out of it....its not coming off, even with the correct socket :(

I guess the first thing that comes to mind....are you turning/exerting force in the correct direction?

Or maybe "they" cross-threaded it.

That thing must really be tight. Plus its made of plastic. Is there a chance that it was cross-threaded the last time it was installed.
I would go ahead and get a replacement cap. Since you have already had a wrench slip on it, may as well get a new one.
As far as getting the old one off. Maybe a short handle pipe wrench? Plus lots of muscle.
After removal, check the threads in the housing(engine) for damage. When installing new cap be sure to put a coat of oil on the new O-ring.
Good Luck.

I am turning in a counter clockwise motion

Then yes, it should come off...