John P. just leveled up his 2017 GMC Sierra 2500! ![]()
He installed the Conductor’s Special 844 Nightmare Edition Train Horn Kit with the Shocker XL Train Horn Mount and a 220 PSI Digital Air Pressure Gauge, and now his truck is sounding louder, meaner, and ready to turn heads everywhere! ![]()
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From city streets to open highways, John’s setup delivers insane power and precision—this Sierra is not just a truck, it’s a statement. ![]()
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#TrainHornLife #HornBlasters #Conductor844 #NightmareEdition #ShockerXL #TruckMods #GMC #Sierra2500 #LoudAndProud #TruckEnthusiast






