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Old 01-21-2010, 05:16 PM   #6
zen
 
Drives: 2011 CTS CPE & 2010 2LT/RS CGM
Join Date: Jun 2009
Location: Nevada
Posts: 337
Is it a manual or automatic. If I remember there were some that had bad valve lifters that were replaced. I believe there is a bulletin about it.

If it is an automatic trans it could be a problem with the AFM (DOD) which uses different lifters in the center 4 cylinders. Blue smoke would be caused by bad lifters and or seals.
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