I have changed all the fuses that might apply, changed bulbs & checked the wiring... Why the turn signals & brake lights at the sametime? Is there a common denominator??? I would appreciate any help!!!

Thanks,
Bill

Did you check all the fuses and relays under the hood as well?

Yeah, I checked the larger fuses under the hood. I have not replaced any of the relays though. I called the dealer and he said it sounded like a wiring problem...but would that affect both rear brake lights & turn signals??? The tail lights & third brake light still work. Thanks for the reply, this is driving me nuts!
Bill

Well, I guess I will have to take it to the shop to get tested. I am beginning to think it is probably the turn signal switch. But that is just a guess. I appreciate the responce... :)

It's your relay switch located in your fuse box on side panel of drivers side. I had same problem with my 3500 last year...it is no wiring problem.