Right. They continued to use that stereo in the Trans Sport and Grand Am.
The point of my picture was to show that a 94-99 Bonneville Stereo can be installed in a 1992 or 1993 Bonneville. That is to be done using the procedure (for jwikoff)
What you have is a stereo out of a different Pontiac. Did you have the steering wheel control wire going to pin No. 6 on the auxillary harness or did it go to a different wire?
You may have a stereo not compatible with your steering wheel controls... But I would try plugging the light green wire into the other pins on the auxillary harness as a check.
If that doesn't work, the other thing you may be able to do is put the correct resistors into the steering wheel controls. But we have to know what those are! We need the wiring diagram from the car you removed the stereo from.
1999 540iA Sport
Former 93 SSEi Owner
Former 89 SE Owner