Thread: official switchback/led bulb hyperflash fix and sidemarker flash delete.

Originally Posted by GPOBD

I have been looking yet found no luck to how to do this to a 2004 grand prix.. I can't find the flasher and multiple websites say different things.. Its built in the hazard button, its not modifiable, its under the dash, someone halp!

This is for the 97-03 GP's. 04+ does the flashing through the BCM. Not sure if you can tweak it at all.