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I have had the oil changed at the dealer a couple of times. I finally decided to do it myself.
Bad decision.
But anyway, here is what I learned, in case anybody is interested.
The oil drain plug has a 10mm head. This is bad. In my uneducated opinion. Its too small, and so if over-tightened you may have trouble removing it. And that's what happened to me - the dealer cranked the plug in too tight, so when I put my 10mm socket on it and tried to remove it, it rounded off the head and did not move. (I was using a cheap autozone 10mm socket, not a quality 6 sided socket, for the record)
I finally got a pair of vice grips and clamped them, NOT on the head, but on the rim around the head which is the size of a quarter. When I did that, I was able to remove it easily. But to be honest, this method was not exactly the first one that occurred to me, and I wasted probably 5 hours messing with it.
I am putting in a new, NON GM oil drain plug I bought at Autozone, which has a 1/2in head on it. I anticipate it will be MUCH easier to remove a couple years from now when I do this again.
Oh, the size of the drain plug is M14-1.5
This means the diameter of the plug is 14mm, and the thread-to-thread distance is 1.5mm. The length of the plug isn't specified.
I actually ordered some plugs from amazon and will look at them when I get them. One is magnetic. I may wait and use it. Right now the car is sitting up on ramps, no oil, no filter, no drain plug installed, waiting for me to finish the job. I'm lucky and have a second car, so I can leave it like this until I get the new stuff (premium oil filter ordered because they only have a standard filter at autozone).
Please see attached pictures.
Bad decision.
But anyway, here is what I learned, in case anybody is interested.
The oil drain plug has a 10mm head. This is bad. In my uneducated opinion. Its too small, and so if over-tightened you may have trouble removing it. And that's what happened to me - the dealer cranked the plug in too tight, so when I put my 10mm socket on it and tried to remove it, it rounded off the head and did not move. (I was using a cheap autozone 10mm socket, not a quality 6 sided socket, for the record)
I finally got a pair of vice grips and clamped them, NOT on the head, but on the rim around the head which is the size of a quarter. When I did that, I was able to remove it easily. But to be honest, this method was not exactly the first one that occurred to me, and I wasted probably 5 hours messing with it.
I am putting in a new, NON GM oil drain plug I bought at Autozone, which has a 1/2in head on it. I anticipate it will be MUCH easier to remove a couple years from now when I do this again.
Oh, the size of the drain plug is M14-1.5
This means the diameter of the plug is 14mm, and the thread-to-thread distance is 1.5mm. The length of the plug isn't specified.
I actually ordered some plugs from amazon and will look at them when I get them. One is magnetic. I may wait and use it. Right now the car is sitting up on ramps, no oil, no filter, no drain plug installed, waiting for me to finish the job. I'm lucky and have a second car, so I can leave it like this until I get the new stuff (premium oil filter ordered because they only have a standard filter at autozone).
Please see attached pictures.


