I had dealer do it. I had other work at same time so I am not sure of cost w/o looking up in my files. I thought car ran slightly better after change. I have twin turbo and maintenance page in manual said after 60,000 miles.
Seeing as how plugs last a very long time nowadays, daughter has 135k on her original '05 Impala V6 plugs, I submit not a whole lot of XTS's have undergone spark plug replacement. I have 28k mi. on my '13. My mechanic said if it ain't broke don't fix it on plugs. I know the turbo motor has a shorter maintenance interval.
The service manual says yes, remove intake manifold for engine bank 1 (that's the rear) ignition coil replacement. Have you removed the intake manifold cover and had a look? Front plugs 2, 4, and 6, look easy to access. Rear plugs 3 and 5 look like a maybe w/o intake manifold removal. Plug #1 and it's respective coil pack is hiding under an extension of the intake manifold. Hard to even get a photo of it. The ruler in photo #1 is pointing at the extension. Photo #2 shows the #1 coil pack hiding under that piece. Photo #3 shows #5,3 and 1 coil packs with the last photo of the engine with the intake cover removed. Interested to know how it works out for you as it looks kind of tight in the back.I have a 2013 XTS and I need to do a spark plug change. Has anyone does this themself ? Does the intake NEED to come off? Thanks!
At least you don't have to lift the body off like you do on a Ford F150 for a spark plug change.Its $700.00 for the dealer to replace 6 spark plugs... 3hr labor charge to remove and reinstall the intake manifold. I am disappointed that GM would design the engine parts in such a way to prevent the normal owner from performing this basic maintenance item. I believe easily changing the spark plugs in my car is a right protected by the constitution... lol
I just changed my spark plugs I got a 2014 xts platinum & I changed #1 & #2 coil packs & buddy it runs like a champ I literally woke it up . It took about 1 hour & yes the ones in the back is under the intake . & get you a new set of upper gaskets & please get ACDCO coast in parts $ 100.00I have a 2013 XTS and I need to do a spark plug change. Has anyone does this themself ? Does the intake NEED to come off? Thanks!
Hello, I have a 2014 XTS Vsport. I recently changed the spark plugs yesterday. It was not hard at all. It took some time but not hard to do at all and there is a definite improvement in performance and MPG. I can walk you through with pictures if needed.