Cadillac STS The newest installation of the performance sedan from Cadillac, having replaced the Seville

? about spark plugs

  #1  
Old 04-07-2014, 07:37 PM
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i know the recommended plug is the ac delco platinum. in my search i found the ac delco platinum and then i found the ac delco professional platinum. same number on both. is there a difference? and which one should i use for my 2002 sts? thanks for the help
 
  #2  
Old 04-10-2014, 06:22 PM
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Same part number equals same part, warranty should be the same. I would go with best price
 
  #3  
Old 05-01-2014, 12:35 AM
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I put new plugs on my 97 sts tonight ... They were ac delco and really cheap and my car is running so much better and improved gas mileage. The part # for the ones i got is R42LTS
 
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