See also:

Radio(s)
VOL/ : Press to turn the system on and off. Turn to increase or decrease the volume. FM/AM: Press to select between FM or AM. : Press to select XM™, if equipped. TUNE/TONE: Turn to select ...

OnStar Overview
If equipped, this vehicle has a comprehensive, in-vehicle system that can connect to a live Advisor for Emergency, Security, Navigation, Connection, and Diagnostic Services. The OnStar system ...

Powertrain
The XLR's Northstar V-8 VVT is a 90-degree, DOHC, four-valves-per-cylinder engine featuring an aluminum block and cylinder heads, and a valvetrain configuration with roller finger followers. The e ...