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CTS 3.6L 2012
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14 Posts
Discussion Starter #1
Hi guys,
I just wanted to share with you that replacing the spark plugs on the 2013 3.6 CTS is an easy job, but I thought it worthwhile because all the info I found before I did the job, including all the YouTube clips, showed that one had to either remove the plenum chamber completely, or at least partially, and in many clips there was some messing around with a difficult to reach bolt close to the bulkhead. I may have missed something, but anyway, here is my contribution.
Anyway, there is NO NEED to remove the plenum; in fact the only things that need to be moved out of the way are a couple of hoses. The access to the plugs is very good and there are no obstructions.
I've posted a clip here: https://youtu.be/hV7QyhPKq7A
I apologize for the amateurish quality of the video, but all the relevant technical tips and details are there.
Hope this helps.
 

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Go ahead, blame me. Everybody does 馃檮
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10,124 Posts
Plenum removal is necessary on non-DI engines.
 

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'12 CTS Performance Sports Wagon AWD
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3,029 Posts
Yup, as a previous owner of an Ly7 non-di engine I assure you THAT engine you had to remove the intake plenum for. This 2012 does look like it will be much easier when I get around to changing the plugs.
 
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