OnStar Services

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CD/DVD Player
The CD/DVD player can play CDs, DVD—As, MP3/WMA CDs, MP3/WMA DVDs, and DVD—Vs. The CD/DVD player will not play 8 cm(3 in) discs. Care of CDs and DVDs Sound quality can be reduced due to disc ...

Interior Quality & Comfort
The CTS' cabin quality has held up well since this generation first hit the road as a 2008 model, and it's still competitive against newer entrants like the 535i and M37. Among the highlights are ...

Body Component Lubrication
Lubricate all key lock cylinders, hood hinges, liftgate hinges, and the steel fuel door hinge unless the components are plastic. Applying silicone grease on weatherstrips with a clean cloth ...