He has an 04.check for this relay, then there are 3 more that are needed in the box under the hood, 2 more blue and 1 brown
Correct, and the 04-05 does not have the relay under the dash, just the two under the hood. One of those is for battery power to the trailer; it isn't necessary unless you need to have 12 volts to the trailer, such as for a travel trailer.He has an 04.
The 04-05 only take two under the hood, hence the TSB and adding the two fuse at the BCM. Those are for left/right turn signal and not running lights.
@totrow, When you pulled the fuse, did you check it with a meter or just visual?
These fuse so small, blown fuse sometimes looked intact.