So I guess it's time to check the rubber brake lines then, eh? Never thought of that. Strange how vac. will make the radio display dim. Guess it's taxing the motor and it dips a little. Figured it was a ground issue.

So how flaky are the PCM's in these things? I'd bet this one is still stock.

Might wander over to my GMForum and search through the Bonneville section for some reading material.

I figure even if I have to put $100 into it, then it's all good seeing as how the car was free to me.