All, for the last couple of weeks, my truck is running good some days, and less good others....I can tell a difference in power (approx 10-20%)....on bad days it feels flat....

A. It's not the fuel, as it happens on the same tank of gas
B. Temps have been fluxuating +/- 20 degrees...but I dont think there's any consistancy.

Is the AC Sensor Wire Chaffing (from another post) applicable for 05's...

Could it be a short on some other wire/elec? / Fuel Pump issue?

I'll take it to the dealer, but we all know where that leads (nowhere)....what could I have them check? Any thoughts appreciated.

 

might want to check the AC sensor wire. I opened mine up and checked it just incase, no chaffing, but I did wrap up the wire with electrical tape and then put it in wire loom just to be safe.
I haven't heard of any 05 with wire chaffing problem but there's always a first.