New RoadMAX serpentine belt.  This is a stock replacement belt.  This is a 4-rib belt, for the a/c compressor.  This belt fits the following application, using stock pulleys and components (non-reduction):

04-07 LS6/LS2 CTS-V

NOTE : Our belt listings are for stock/factory pulley and bracket configurations.  If you have an aftermarket setup, bracket, or pulley, you will need to consult with the manufacturer of those parts to see the correct length belt you need.