January 1, 2005"I don't have the high idle option, they didn't start installing it until 2004, it is activated by the cruise control."
The high idle kit is something you install yourself. You can buy the wire and pin and install it yourself in about an hour. I live in alaksa and it has gotten down to -35 F this winter and the truck never really gets much above 180 driving on the highway. I can watch my temp guage drop when I come to a stoplight. It has done this since the temps got down to about 10 degrees. I also have the coldfront grille cover it helps a little, not a whole lot though. As long as the cab is warm, I wouldn't fret over the engine temp unless it is below 180. My 2 cents worth!