Tan GM truck dash with factory radio plus added idle-speed knob…

The high idle switch is now labeled in a font very similar to the rest of the dash.

Regardless of this switch, the high idle is DISabled if the brake lights are on, or if the shifter is in any gear other than P or N. This truck idles at 730 RPM (off); low is 1070; medium is 1360; hi is 1600.

Owner caption July 2013 · Photo 375 of 401