i just got my 98 bonneville a month ago and delco radio had no display so i bought a aftermarket radio and harness clip and radio works but no sound noticed the clip did have all the wires the car clip had
should i straight wire the speakers if so i need a wire diagram or at least the colors i also have the bose package if that helps

Try here:

http://www.the12volt.com/installbay/...d/Pontiac.html

There is a built in amp that needs to have the blue wire connected to it to turn it on im sure someone will reply with the color wire that needs to be connected

1998 Pontiac Bonneville Stereo WiringConstant 12V+Orange Switched 12V+Yellow GroundBlack IlluminationGray Dimmern/a Antenna TriggerPower Should be LIGHT GREEN. Can be used for remote amp.AntennaRight Rear Front Speakers4" x 6" DashLeft Front (+)Tan Left Front (-)Gray Right Front (+)Light Green Right Front (-)Dark Green Rear Speakers6" x 9" Rear DeckLeft Rear (+)Brown Left Rear (-)Yellow Right Rear (+)Dark Blue Right Rear (-)Light Blue

i dont have a light blue wire or yellow

that is not the color wires i have

That may be the difference your seeing. My bad I missed the fact that you had a Bose system.

Ok, what color wires do you have?

if anyone is trying this to bose system there is a lone orange wire on factory clip.That is the power to the factory amp i just spliced it in with my acc power (red) wire and everything works great
jammin now!!!

that'* the wire i was talking about just didnt know which color it was glad you got it working