no i dont have one i checked for it i didnt know if you had the stealth switch you dont have a T/S
I'm going from fuzzy memory here, so double check what I'm saying. There is a remote dimmer module somewhere under the dash, AC Delco p/n D1509B. It is a transistor circuit that controls dash illumination when the lights are on. I believe (again, double check me here) that when it fails the dash lights work only when the headlight switch is off. The factory service manual has the complete troubleshooting sequence I think. Note that this module is NOT the dimmer switch-- it is separate. Rockauto has them for about $30. They're used on a bunch of GM vehicles from mid-80s on up, so you can probably find one in the boneyard if you want a cheap one as a "try-and-see" part.
I think what he's saying is when his lights are off, his cluster lights up but when he turns his lights on, his cluster turns off. I think it mite be something to do with the dimmer switch, but I don't knowWhats exactly happening...when u turn ur lights on...the dash doesnt light up??