me too... i've done this on a 04 tahoe also..... ok try it and hope it works this time around....
you have to add the resistor as the diagram above (50w 6 ohms) on the turn signal wire.... the BCM thinks the bulb is burned out thats why it blinks fast....I finally got this wired up and installed. It works great except that when the brakes and turn signal (either left or right) are both activated (e.g., sitting at a traffic light with the signal on and the brakes applied), the lights flash at twice the normal speed. I suspect that when the power from the turn signal is off, the power from the brake is restored to the lights. I think I need to retard the return of the brake relay when the taillight isn't supplying power to the brake relay. Any suggestions?
The term "Parking Lights" is kinda misleading. While yes, they are parking lights, they are mainly used as nightime running lights (when you drive your TB at night). So it's a good idea to do this mod as well.Thanks for the quick response. Im gonna try to get this done over the weekend. I could care less about the quad parking lights, I just want the quad turns and brakes.:tiphat