See also:

Transmission Messages
DIFFERENTIAL HOT, REDUCE SPEED (CTS-V ONLY) This message displays and a chime sounds if the differential fluid temperature exceeds 150°C (300°F). Driving aggressively or at high speeds can ...

Installing the Crossrails
A. Crossrails B. Siderail Cover Before installing the crossrails (A), remove the siderail covers (B). Pull straight up on the rear of the siderail cover. Store covers flat, do not stack it ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the v ...