OnStar Services

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Used Cadillac CTS-V Models
The current CTS-V represents the model's second generation and was introduced for 2009. It has received no significant changes since then. Produced from 2004-'07, the first-generation Cadillac CTS ...

Service Vehicle Messages
SERVICE A/C SYSTEM This message displays when the electronic sensors that control the air conditioning and heating systems are no longer working. Have the climate control system serviced by ...

Increasing Speed While Using Cruise Control
If the cruise control system is already activated, . Press and hold the +RES button on the steering wheel until the desired speed is reached, then release it. . To increase vehicle speed in small ...