i added this factory nav to my suburban, been around the block on this one
you'll need the delphi gm nav unit, not the denso. also, you'll have to watch out for the lux version vs non lux version of the nav units. your GP should take the non-lux unit (the factory amp would not be controlled by class II data in a non-lux situation)
aside from making fitment changes (if any) the wiring should actually plug right in and be good to go, since the gp's didnt use that dock-n-lock connector on the radio.
