Additional Maintenance and Care
Your vehicle is an important investment and caring for it properly may help to avoid future costly repairs. To maintain vehicle performance, additional maintenance services may be required. It is recommended that your dealer perform these services — their trained dealer technicians know your vehicle best.
Your dealer can also perform a thorough assessment with a multi–point inspection to recommend when your vehicle may need attention. The following list is intended to explain the services and conditions to look for that may indicate services are required.
See also:
OnStar Additional Information
Transferring Service
Push to request account transfer
eligibility information. The Advisor can assist in canceling or removing account
information. If OnStar receives information that vehicle ow ...
Engine & Transmission
The CTS comes standard with a 3.0-liter V-6 engine, but our test car's
optional 3.6-liter V-6 and six-speed automatic transmission are a special pair
among drivetrains. The transmission's shifts a ...
Seat Position
To adjust the seat:
- Move the seat forward or
rearward by moving the
horizontal control forward or
rearward.
- Raise or lower the front or rear
part of the seat cushion by
moving the fr ...






