See also:

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 ...

Fluids
Proper fluid levels and approved fluids protect the vehicle’s systems and components. See Recommended Fluids and Lubricants for GM approved fluids. • Engine oil and windshield washer ...

Services Not Included in Roadside Assistance
• Impound towing caused by violation of any laws. • Legal fines. • Mounting, dismounting or changing of snow tires, chains, or other traction devices. • Towing or services for vehicles dr ...