This mod adds many new truck sounds, as listed below.
It also includes three new air horn options.

– Low air pressure warning alarm
– Blinker switches
– Blinker on/off relay
– Engine brake switch
– Light switches
– Window wipers
– Power windows up/down (WIP)
– Power window up/down button clicks
– Altered wrong-gear grinding sounds
– Trailer attachment sounds (air and clunks)
– Trailer detachment sounds (air and clunks)
– Gear shifter sounds
– Parking brake applied sound (credit to Coyote Man)
– Parking brake released sound
– Air brake sounds and hisses (credits to Coyote Man and Nemaiko)
– Three new air horn options:
– Hadley 37-inch Round
– Ship Horn (sound credit to mortalmjc)
– Train Horn (sound credit to mortalmjc)

Credits: TAG HEAVY HAUL