Abstract: A vehicle brake line de-icing device for deicing the air brake lines of a tractor trailer or the like. The device is compact with a reservoir having flat sides for best chosen fit and/or mounting. The reservoir can selectively pivot and lock in differing rotational positions on the tubes on each end that are affixed to gladhand connectors for communicating with those on a vehicle. To thaw the brake lines, the user releases air through the brake lines and thereby circulates the antifreeze therethrough. This process thaws the brake lines in approximately 5 to 7 minutes, as opposed to an expensive 2-hour service call.