How do you replace a front heater core in 1999 b3500 dodge van?

  1. Remove the grille panel, the cowl grille support panel, the right headlamp assembly, and the right radiator core support assembly.
  2. From inside the vehicle, remove the glove box bin, the right spot cooler duct, and the lower instrument panel skirt.
  3. Through the glove box opening and from under the instrument panel, remove the screws and nuts that secure the heater-A/C housing to the dash panel.
  4. Remove the screws that secure the flange connection between the heater-A/C housing and the blower housing.
  5. Separate the heater-A/C housing from the blower housing, and carefully remove the heater-A/C housing from the vehicle.