maybe someone can tell me what this is. in my '82 k5 5.7L, i found an open-ended hose hanging behind the brake pedal. same type hose as the larger vaccum lines underhood. it runs back behind the dash insulation, so i can't see if it passes through the firewall. i'll check under the hood better tomorrow when i have sun and no rain, hopefully. is it maybe a drain for a/c condensation? bad location, if so.