See also:

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 ...

Time Shifting (Radio with CD/DVD and MEM)
The radio with the MEM time shift feature can rewind 20 minutes of XM content. While listening to the radio, the content from the current channel is always being buffered. Press   to pause t ...

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 ...