See also:

With Selective Ride Control
1. Move the shift lever to the left from D (Drive). The vehicle will be in Sport Mode. The gear indicator in the DIC will still display a D for Drive, and the SPORT MODE ON message will be ...

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 ...

Maintenance When Trailer Towing
The vehicle needs service more often when pulling a trailer. See Scheduled Maintenance for more information. Things that are especially important in trailer operation are automatic transmission ...