I have a 2005 G6 and none of the power windows work with the exception of the passenger front (right front) and it only works with the right front switch and not the driver's switch. I saw that member Peters1919 posted this same problem last year but a resolution wasn't posted. I have changed out the driver's side switch assembly but that didn't help. I also checked the fuses and all look good. I checked the accessory voltage coming from the BCM to the driver's side switch (C1) and it measures about 8 Volts when the plug isn't plugged into the switch. As soon as I plug it into the switch, the voltage drops to about 4 Volts. Any help would be greatly appreciated.