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spark plug's on 2003 Cadillac CTS

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
where r they located
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2003 cts spark plug installiation
http://s306.photobucket.com/albums/nn244/04deveni/CTS%20Spark%20Plug%20Change/
do i have to use ac-delco? because everywhere i go they keep telling me i have too. also when i was looking up the spark plugs shown in your install i find that it says i cant use that model. it says use model 5344. i have the 04' V6 3.6L