tamss13 Posted November 13, 2011 Report Share Posted November 13, 2011 I have an 2006 CTS I purchased it from a friend since the engine was blown and he couldn't afford to fix it. I originally taught I was purchasing a 2004, but realized it was an 2006. My question is instead of rebuilding the engine or replacing with the same engine. I would like to up-grade to a more sporty engine. Could someone give me suggestions what to expect or if this can be done. Would like to go to an LS6 engine. I believe I would have to change out the trans and the rear-end, any help would be great. Link to comment Share on other sites More sharing options...
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