I would definitely check them for operation first. Transitions from one model year to the next may not be perfect, and some holdover parts could happen - ie the 04connections for the auxiliary gauges could have still been in the parts bin for some of the first 05s.
If the 04 gauges are not operational, your dealership should be installing the 05 gauges.
Ray
If the 04 gauges are not operational, your dealership should be installing the 05 gauges.
Ray