2006 1500 front shocks

[turbostar]

It's time to replace the front shocks on my 2006 Silverado 1500 lt. The Haynes manual mentions a possibility that the truck could have a "suspension control system" ,and the shocks are different if so equipped. Before I order shocks I want to make sure I order the right ones. Haynes says "unlock and unplug the electrical connector from the top of the shock absorber" when removing those with a suspension control system. I see no connector but I really don't know if I'm looking in the right location. Anyone know if there is a code for this mysterious suspension control system? And maybe is there something on the dash to indicate if the truck has that system? The owners manual has nothing that would tell me if the truck has the system. Any info is appreciated.