0 0 2014 Mack GU400 Cab Wiring Harness $600 USD (USED) Mack GU400 Engine Model: CUMMINS ISL From: FIREWALL Transmission Type: AUTOMATIC To: FRONT ABS ConditionUsedFits To Make(s)MackFits To Model(s)GU400Stock Number25907536 MLS Number14019796CategoryCab Wiring Harnesses Last Updated12/6/2025 LocationDes Moines, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info