2005 Cadillac CTS
Does my 2005 Cadillac have a north star engine it has the
3.6L in it and is misfiring a common problem
Any car can misfire if the plugs are old or a coil goes bad. How long has it been since you had a tuneup?
No. Your 2005 Cadillac w/ 3.6L does not have a Northstar engine. As Full_of_Regrets said, try a simple tune-up. Could be a bad wire (Spark Plug) too.
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