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 the vehic ...

Safety and security
As with all vehicles built on GM's new full-size SUV platform, the '07 Yukon family features a 360-degree safety system designed around the pillars of occupant protection, driver control and perso ...

Using the “Dial” or “Call” Command
1. Press and hold for two seconds. 2. Say “Dial” or “Call.” 3. Say the entire number without pausing, or say the name tag. Once connected, the person called will be heard through the audio ...