Ever since I went to Efi Live, my high idle disappeared for when its cold outside and I start my truck below a certain temp. Is there just a click on the computer to turn it back on?
Turn the key to run, hold accelerator to the floor, then tap your brake pedal quickly 3 times to turn it on. That's how it works on new ones, its probably the same on an 05 it should say elevated idle on on the DIC if it worked.